Granvik, Mikael (0000-0002-5624-1888)

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Granvik, Mikael ORCID iD icon

orcid.org/0000-0002-5624-1888

Alternative names

Granvik, M.

Publications (10 of 94) Show all publications

Nucita, A. A., Conversi, L., Verdier, A., Franco, A., Sacquegna, S., Pöntinen, M., . . . Scottez, V. (2025). Euclid: Detecting Solar System objects in Euclid images and classifying them using Kohonen self-organising maps. Astronomy and Astrophysics, 694, Article ID A116.

Open this publication in new window or tab >>Euclid: Detecting Solar System objects in Euclid images and classifying them using Kohonen self-organising maps

Nucita, A. A.

Conversi, L.

Verdier, A.

Franco, A.

Sacquegna, S.

Pöntinen, M.

Altieri, B.

Carry, B.

De Paolis, F.

Strafella, F.

Orofino, V.

Maiorano, M.

Kansal, V.

Vavrek, R. D.

Miluzio, M.

Granvik, Mikael

Testa, V.

Aghanim, N.

Andreon, S.

Auricchio, N.

Baldi, M.

Bardelli, S.

Branchini, E.

Brescia, M.

Brinchmann, J.

Camera, S.

Capobianco, V.

Carbone, C.

Carretero, J.

Casas, S.

Castellano, M.

Castignani, G.

Cavuoti, S.

Cimatti, A.

Congedo, G.

Conselice, C. J.

Copin, Y.

Courbin, F.

Courtois, H. M.

Da Silva, A.

Degaudenzi, H.

Di Giorgio, A. M.

Dinis, J.

Dubath, F.

Dupac, X.

Dusini, S.

Farina, M.

Farrens, S.

Ferriol, S.

Frailis, M.

Franceschi, E.

Fumana, M.

Galeotta, S.

Gillis, B.

Giocoli, C.

Gómez-Alvarez, P.

Grazian, A.

Grupp, F.

Haugan, S. V.H.

Hoar, J.

Holmes, W.

Hormuth, F.

Hornstrup, A.

Hudelot, P.

Jahnke, K.

Jhabvala, M.

Keihänen, E.

Kermiche, S.

Kiessling, A.

Kilbinger, M.

Kohley, R.

Kubik, B.

Kümmel, M.

Kurki-Suonio, H.

Laureijs, R.

Ligori, S.

Lilje, P. B.

Lindholm, V.

Lloro, I.

Maiorano, E.

Mansutti, O.

Marggraf, O.

Markovic, K.

Martinet, N.

Marulli, F.

Massey, R.

Masters, D. C.

Medinaceli, E.

Mei, S.

Mellier, Y.

Meneghetti, M.

Meylan, G.

Moresco, M.

Moscardini, L.

Nakajima, R.

Niemi, S. M.

Padilla, C.

Paltani, S.

Pasian, F.

Pedersen, K.

Pettorino, V.

Pires, S.

Polenta, G.

Poncet, M.

Popa, L. A.

Pozzetti, L.

Raison, F.

Rebolo, R.

Renzi, A.

Rhodes, J.

Riccio, G.

Romelli, E.

Roncarelli, M.

Rossetti, E.

Saglia, R.

Sapone, D.

Sartoris, B.

Schirmer, M.

Schneider, P.

Secroun, A.

Seidel, G.

Serrano, S.

Sirignano, C.

Sirri, G.

Skottfelt, J.

Stanco, L.

Steinwagner, J.

Tallada-Crespí, P.

Taylor, A. N.

Tereno, I.

Toledo-Moreo, R.

Torradeflot, F.

Tutusaus, I.

Valenziano, L.

Vassallo, T.

Verdoes Kleijn, G.

Veropalumbo, A.

Wang, Y.

Weller, J.

Zacchei, A.

Zucca, E.

Bolzonella, M.

Burigana, C.

Scottez, V.

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2025 (English)In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 694, article id A116Article in journal (Refereed) Published

Abstract [en]

The ESA Euclid mission will survey more than 14 000 deg2 of the sky in visible and near-infrared wavelengths, mapping the extragalactic sky to constrain our cosmological model of the Universe. Although the survey focusses on regions further than 15° from the ecliptic, it should allow for the detection of more than about 105 Solar System objects (SSOs). After simulating the expected signal from SSOs in Euclid images acquired with the visible camera (VIS), we describe an automated pipeline developed to detect moving objects with an apparent velocity in the range of 0.1–10″ h−1, typically corresponding to sources in the outer Solar System (from Centaurs to Kuiper-belt objects). In particular, the proposed detection scheme is based on SExtractor software and on applying a new algorithm capable of associating moving objects amongst different catalogues. After applying a suite of filters to improve the detection quality, we study the expected purity and completeness of the SSO detections. We also show how a Kohonen self-organising neural network can be successfully trained (in an unsupervised fashion) to classify stars, galaxies, and SSOs. By implementing an early-stopping method in the training scheme, we show that the network can be used in a predictive way, allowing one to assign the probability of each detected object being a member of each considered class.

Place, publisher, year, edition, pages

EDP Sciences, 2025

Keywords

methods: data analysis, methods: numerical, comets: general, Kuiper belt: general, minor planets, asteroids: general, Oort Cloud

National Category

Astronomy, Astrophysics and Cosmology

Research subject

Onboard Space Systems

Identifiers

urn:nbn:se:ltu:diva-111711 (URN)10.1051/0004-6361/202451767 (DOI)2-s2.0-85217693752 (Scopus ID)

Note

Validerad;2025;Nivå 2;2025-02-24 (u5);

Full text license: CC BY 4.0;

For funding information, see: https://www.aanda.org/articles/aa/full_html/2025/02/aa51767-24/aa51767-24.html

Available from: 2025-02-24 Created: 2025-02-24 Last updated: 2025-02-24Bibliographically approved

Bolin, B., Masci, F., Coughlin, M., Duev, D., Ivezić, Ž., Jones, R., . . . Swain, V. (2025). The Palomar twilight survey of ‘Ayló’chaxnim, Atiras, and comets. Icarus, 425, Article ID 116333.

Open this publication in new window or tab >>The Palomar twilight survey of ‘Ayló’chaxnim, Atiras, and comets

Bolin, B.T.

Masci, F.J.

Coughlin, M.W.

Duev, D.A.

Ivezić, Ž.

Jones, R.L.

Yoachim, P.

Ahumada, T.

Bhalerao, V.

Choudhary, H.

Contreras, C.

Cheng, Y.C.

Copperwheat, C.M.

Deshmukh, K.

Fremling, C.

Granvik, M.

Hardegree-Ullman, K.K.

Ho, A.Y.Q.

Jedicke, R.

Kasliwal, M.

Kumar, H.

Lin, Z.Y.

Mahabal, A.

Monson, A.

Neill, J.D.

Nesvorný, D.

Perley, D.A.

Purdum, J.N.

Quimby, R.

Serabyn, E.

Sharma, K.

Swain, V.

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2025 (English)In: Icarus, ISSN 0019-1035, E-ISSN 1090-2643, Vol. 425, article id 116333Article in journal (Refereed) Published

Abstract [en]

Near-sun sky twilight observations allow for the detection of asteroids interior to the orbit of Venus (Aylos) and the Earth (Atiras) and comets. We present the results of observations with the Palomar 48-inch telescope (P48)/Zwicky Transient Facility (ZTF) camera in 30 s r-band exposures taken during evening astronomical twilight from 2019 Sep 20 to 2022 March 7 and during morning astronomical twilight sky from 2019 Sep 21 to 2022 Sep 29. More than 21,940 exposures were taken in evening astronomical twilight within 31° and 66° from the Sun with an r-band limiting magnitude between 18.0 and 20.8 (5th to 95th percentile), and more than 24,370 exposures were taken in morning astronomical twilight within 31° and 65° from the Sun with an r-band limiting magnitude between 18.2 and 20.9 (5th to 95th percentile). The morning and evening twilight pointings show a slight seasonal dependence in limiting magnitude and ability to point closer towards the Sun, with limiting magnitude improving by 0.5 magnitudes during the summer months and Sun-centric angular distances as small as 31–32° during the spring and fall months. In total, the one Aylo, (594913) ‘Ayló’chaxnim, and 4 Atiras, 2020 OV₁, 2021 BS₁, 2021 PB₂, and 2021 VR₃, were discovered in evening and morning twilight observations. Additional twilight survey discoveries also include 6 long period comets: C/2020 T2, C/2020 V2, C/2021 D2, C/2021 E3, C/2022 E3 and C/2022 P3, and two short period comets: P/2021 N1 and P/2022 P2 using deep learning comet detection pipelines. The P48/ZTF twilight survey also recovered 11 known Atiras, one Aylo, three short period comes, two long period comets, one interstellar object, 45,536 Main Belt asteroids, and 265 near-Earth objects. Additionally, observations from the GROWTH network of telescopes were used to recover the Aylo, Atira, and comet discoveries made during the ZTF twilight survey. Lastly, we discuss the future twilight surveys for the discovery of Aylos such as with the Vera Rubin Observatory which will have a twilight survey starting in its first year of operations and will cover the sky as within 45 degrees from the Sun. Twilight surveys such as those by ZTF and future surveys will provide opportunities for the discovery of asteroids inside the orbits of the terrestrial planets that would otherwise be unavailable in conventional sky survey observations.

Place, publisher, year, edition, pages

Elsevier, 2025

Keywords

Asteroids, Dynamics, Near-earth objects

National Category

Astronomy, Astrophysics and Cosmology

Research subject

Onboard Space Systems

Identifiers

urn:nbn:se:ltu:diva-110303 (URN)10.1016/j.icarus.2024.116333 (DOI)001331420800001 ()2-s2.0-85205319392 (Scopus ID)

Funder

Stockholm University

Note

Validerad;2024;Nivå 2;2024-10-09 (sofila);

Funder: National ScienceFoundation, United States (grants no. AST-1440341 and AST-2034437); Caltech; IPAC; the Weizmann Institute for Science; the University of Maryland; Deutsches Elektronen-Synchrotron and Humboldt University; the TANGO Consortium of Taiwan; the University of Wisconsin at Mil-waukee; Trinity College Dublin; Lawrence Livermore National Laboratories, IN2P3, France; University of Warwick, United Kingdom; Ruhr University Bochum; Northwestern University; the University of Washington; Los Alamos National Laboratories; Lawrence Berkeley National Laboratories

Available from: 2024-10-09 Created: 2024-10-09 Last updated: 2024-12-03Bibliographically approved

Panuzzo, P., Mazeh, T., Arenou, F., Holl, B., Caffau, E., Jorissen, A., . . . Zwitter, T. (2024). Discovery of a dormant 33 solar-mass black hole in pre-release Gaia astrometry. Astronomy and Astrophysics, 686, Article ID L2.

Open this publication in new window or tab >>Discovery of a dormant 33 solar-mass black hole in pre-release Gaia astrometry

Panuzzo, P.

Mazeh, T.

Arenou, F.

Holl, B.

Caffau, E.

Jorissen, A.

Babusiaux, C.

Gavras, P.

Sahlmann, J.

Bastian, U.

Wyrzykowski, Ł.

Eyer, L.

Leclerc, N.

Bauchet, N.

Bombrun, A.

Mowlavi, N.

Seabroke, G. M.

Teyssier, D.

Balbinot, E.

Helmi, A.

Brown, A. G.A.

Vallenari, A.

Prusti, T.

De Bruijne, J. H.J.

Barbier, A.

Biermann, M.

Creevey, O. L.

Ducourant, C.

Evans, D. W.

Guerra, R.

Hutton, A.

Jordi, C.

Klioner, S. A.

Lammers, U.

Lindegren, L.

Luri, X.

Mignard, F.

Nicolas, C.

Randich, S.

Sartoretti, P.

Smiljanic, R.

Tanga, P.

Walton, N. A.

Aerts, C.

Bailer-Jones, C. A.L.

Cropper, M.

Drimmel, R.

Jansen, F.

Katz, D.

Lattanzi, M. G.

Soubiran, C.

Thévenin, F.

Van Leeuwen, F.

Andrae, R.

Audard, M.

Bakker, J.

Blomme, R.

Castañeda, J.

De Angeli, F.

Fabricius, C.

Fouesneau, M.

Frémat, Y.

Galluccio, L.

Guerrier, A.

Heiter, U.

Masana, E.

Messineo, R.

Nienartowicz, K.

Pailler, F.

Riclet, F.

Roux, W.

Sordo, R.

Gracia-Abril, G.

Portell, J.

Altmann, M.

Benson, K.

Berthier, J.

Burgess, P. W.

Busonero, D.

Busso, G.

Cacciari, C.

Cánovas, H.

Carrasco, J. M.

Carry, B.

Cellino, A.

Cheek, N.

Clementini, G.

Damerdji, Y.

Davidson, M.

De Teodoro, P.

Delchambre, L.

Della Oro, A.

Fraile Garcia, E.

Garabato, D.

García-Lario, P.

Haigron, R.

Hambly, N. C.

Harrison, D. L.

Hatzidimitriou, D.

Hernández, J.

Hestroffer, D.

Hodgkin, S. T.

Jamal, S.

Jevardat De Fombelle, G.

Jordan, S.

Krone-Martins, A.

Lanzafame, A. C.

Löffler, W.

Lorca, A.

Marchal, O.

Marrese, P. M.

Moitinho, A.

Muinonen, K.

Nuñez Campos, M.

Oreshina-Slezak, I.

Osborne, P.

Pancino, E.

Pauwels, T.

Recio-Blanco, A.

Riello, M.

Rimoldini, L.

Robin, A. C.

Roegiers, T.

Sarro, L. M.

Schultheis, M.

Smith, M.

Sozzetti, A.

Utrilla, E.

Van Leeuwen, M.

Weingrill, K.

Abbas, U.

Ábrahám, P.

Abreu Aramburu, A.

Ahmed, S.

Altavilla, G.

Álvarez, M. A.

Anders, F.

Anderson, R. I.

Anglada Varela, E.

Antoja, T.

Baig, S.

Baines, D.

Baker, S. G.

Balaguer-Núñez, L.

Balog, Z.

Barache, C.

Barros, M.

Barstow, M. A.

Bartolomé, S.

Bashi, D.

Bassilana, J. L.

Baudeau, N.

Becciani, U.

Bedin, L. R.

Bellas-Velidis, I.

Bellazzini, M.

Beordo, W.

Bernet, M.

Bertolotto, C.

Bertone, S.

Bianchi, L.

Binnenfeld, A.

Blanco-Cuaresma, S.

Bland-Hawthorn, J.

Blazere, A.

Boch, T.

Bossini, D.

Bouquillon, S.

Bragaglia, A.

Braine, J.

Bratsolis, E.

Breedt, E.

Bressan, A.

Brouillet, N.

Brugaletta, E.

Bucciarelli, B.

Butkevich, A. G.

Buzzi, R.

Camut, A.

Cancelliere, R.

Cantat-Gaudin, T.

Capilla Guilarte, D.

Carballo, R.

Carlucci, T.

Carnerero, M. I.

Carretero, J.

Carton, S.

Casamiquela, L.

Casey, A.

Castellani, M.

Castro-Ginard, A.

Ceraj, L.

Cesare, V.

Charlot, P.

Chaudet, C.

Chemin, L.

Chiavassa, A.

Chornay, N.

Chosson, D.

Cooper, W. J.

Cornez, T.

Cowell, S.

Crosta, M.

Crowley, C.

Cruz Reyes, M.

Dafonte, C.

Dal Ponte, M.

David, M.

De Laverny, P.

De Luise, F.

De March, R.

De Torres, A.

Del Peloso, E. F.

Delbo, M.

Delgado, A.

Delisle, J. B.

Demouchy, C.

Denis, E.

Dharmawardena, T. E.

Di Giacomo, F.

Diener, C.

Distefano, E.

Dolding, C.

Dsilva, K.

Enke, H.

Fabre, C.

Fabrizio, M.

Faigler, S.

Fatoviä, M.

Fedorets, G.

Fernández-Hernández, J.

Fernique, P.

Figueras, F.

Fouron, C.

Fragkoudi, F.

Gai, M.

Galinier, M.

Garcia-Serrano, A.

García-Torres, M.

Garofalo, A.

Gerlach, E.

Geyer, R.

Giacobbe, P.

Gilmore, G.

Girona, S.

Giuffrida, G.

Gomboc, A.

Gomez, A.

González-Santamaría, I.

Gosset, E.

Granvik, Mikael

Gregori Barrera, V.

Gutiérrez-Sánchez, R.

Haywood, M.

Helmer, A.

Hidalgo, S. L.

Hilger, T.

Hobbs, D.

Hottier, C.

Huckle, H. E.

Jiménez-Arranz, Ó.

Juaristi Campillo, J.

Kaczmarek, Z.

Kervella, P.

Khanna, S.

Kontizas, M.

Kordopatis, G.

Korn, A. J.

Kóspál, Á.

Kostrzewa-Rutkowska, Z.

KruszyåÃ Â Ska, K.

Kun, M.

Lambert, S.

Lanza, A. F.

Lebreton, Y.

Lebzelter, T.

Leccia, S.

Lecoutre, G.

Liao, S.

Liberato, L.

Licata, E.

Livanou, E.

Lobel, A.

López-Miralles, J.

Loup, C.

Madarász, M.

Mahy, L.

Mann, R. G.

Manteiga, M.

Marcellino, C. P.

Marchant, J. M.

Marconi, M.

Marín Pina, D.

Marinoni, S.

Marshall, D. J.

Martín Lozano, J.

Martin Polo, L.

Martín-Fleitas, J. M.

Marton, G.

Mascarenhas, D.

Masip, A.

Mastrobuono-Battisti, A.

McMillan, P. J.

Meichsner, J.

Merc, J.

Messina, S.

Millar, N. R.

Mints, A.

Mohamed, D.

Molina, D.

Molinaro, R.

Molnár, L.

Monguió, M.

Montegriffo, P.

Monti, L.

Mora, A.

Morbidelli, R.

Morris, D.

Mudimadugula, R.

Muraveva, T.

Musella, I.

Nagy, Z.

Nardetto, N.

Navarrete, C.

Oh, S.

Ordenovic, C.

Orenstein, O.

Pagani, C.

Pagano, I.

Palaversa, L.

Palicio, P. A.

Pallas-Quintela, L.

Pawlak, M.

Penttilä, A.

Pesciullesi, P.

Pinamonti, M.

Plachy, E.

Planquart, L.

Plum, G.

Poggio, E.

Pourbaix, D.

Price-Whelan, A. M.

Pulone, L.

Rabin, V.

Rainer, M.

Raiteri, C. M.

Ramos, P.

Ramos-Lerate, M.

Ratajczak, M.

Re Fiorentin, P.

Regibo, S.

Reylé, C.

Ripepi, V.

Riva, A.

Rix, H. W.

Rixon, G.

Robert, G.

Robichon, N.

Robin, C.

Romero-Gómez, M.

Rowell, N.

Ruz Mieres, D.

Rybicki, K. A.

Sadowski, G.

Sagristà Sellés, A.

Sanna, N.

Santoveña, R.

Sarasso, M.

Sarmiento, M. H.

Sarrate Riera, C.

Sciacca, E.

Ségransan, D.

Semczuk, M.

Shahaf, S.

Siebert, A.

Slezak, E.

Smart, R. L.

Snaith, O. N.

Solano, E.

Solitro, F.

Souami, D.

Souchay, J.

Spitoni, E.

Spoto, F.

Squillante, L. A.

Steele, I. A.

Steidelmüller, H.

Surdej, J.

Szabados, L.

Taris, F.

Taylor, M. B.

Teixeira, R.

Tepper-Garcia, T.

Thuillot, W.

Tolomei, L.

Tonello, N.

Torra, F.

Torralba Elipe, G.

Trabucchi, M.

Trentin, E.

Tsantaki, M.

Turon, C.

Ulla, A.

Unger, N.

Valtchanov, I.

Vanel, O.

Vecchiato, A.

Vicente, D.

Villar, E.

Weiler, M.

Zhao, H.

Zorec, J.

Zucker, S.

Župiä, A.

Zwitter, T.

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2024 (English)In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 686, article id L2Article in journal (Refereed) Published

Abstract [en]

Context. Gravitational waves from black-hole (BH) merging events have revealed a population of extra-galactic BHs residing in short-period binaries with masses that are higher than expected based on most stellar evolution models-And also higher than known stellar-origin black holes in our Galaxy. It has been proposed that those high-mass BHs are the remnants of massive metal-poor stars.

Aims. Gaia astrometry is expected to uncover many Galactic wide-binary systems containing dormant BHs, which may not have been detected before. The study of this population will provide new information on the BH-mass distribution in binaries and shed light on their formation mechanisms and progenitors.

Methods. As part of the validation efforts in preparation for the fourth Gaia data release (DR4), we analysed the preliminary astrometric binary solutions, obtained by the Gaia Non-Single Star pipeline, to verify their significance and to minimise false-detection rates in high-mass-function orbital solutions.

Results. The astrometric binary solution of one source, Gaia BH3, implies the presence of a 32.70a ±a 0.82aM- BH in a binary system with a period of 11.6 yr. Gaia radial velocities independently validate the astrometric orbit. Broad-band photometric and spectroscopic data show that the visible component is an old, very metal-poor giant of the Galactic halo, at a distance of 590 pc.

Conclusions. The BH in the Gaia BH3 system is more massive than any other Galactic stellar-origin BH known thus far. The low metallicity of the star companion supports the scenario that metal-poor massive stars are progenitors of the high-mass BHs detected by gravitational-wave telescopes. The Galactic orbit of the system and its metallicity indicate that it might belong to the Sequoia halo substructure. Alternatively, and more plausibly, it could belong to the ED-2 stream, which likely originated from a globular cluster that had been disrupted by the Milky Way.

Place, publisher, year, edition, pages

EDP Sciences, 2024

Keywords

astrometry, binaries: spectroscopic, stars: black holes, stars: evolution, stars: massive, stars: Population II

National Category

Astronomy, Astrophysics and Cosmology

Research subject

Onboard Space Systems

Identifiers

urn:nbn:se:ltu:diva-106125 (URN)10.1051/0004-6361/202449763 (DOI)001261429100001 ()2-s2.0-85194947351 (Scopus ID)

Note

Validerad;2024;Nivå 2;2024-12-02 (signyg);

Funder: for funder information see Appendix F in https://doi.org/10.1051/0004-6361/202449763;

Full text license: CC BY 4.0

Available from: 2024-06-10 Created: 2024-06-10 Last updated: 2024-12-02Bibliographically approved

Krone-Martins, A., Ducourant, C., Galluccio, L., Delchambre, L., Oreshina-Slezak, I., Teixeira, R., . . . Zucker, S. (2024). Gaia Focused Product Release: A catalogue of sources around quasars to search for strongly lensed quasars. Astronomy and Astrophysics, 685, Article ID A130.

Open this publication in new window or tab >>Gaia Focused Product Release: A catalogue of sources around quasars to search for strongly lensed quasars

Krone-Martins, A.

Ducourant, C.

Galluccio, L.

Delchambre, L.

Oreshina-Slezak, I.

Teixeira, R.

Braine, J.

Le Campion, J. F.

Mignard, F.

Roux, W.

Blazere, A.

Pegoraro, L.

Brown, A. G. A.

Vallenari, A.

Prusti, T.

De Bruijne, J. H. J.

Arenou, F.

Babusiaux, C.

Barbier, A.

Biermann, M.

Creevey, O. L.

Evans, D. W.

Eyer, L.

Guerra, R.

Hutton, A.

Jordi, C.

Klioner, S. A.

Lammers, U.

Lindegren, L.

Luri, X.

Randich, S.

Sartoretti, P.

Smiljanic, R.

Tanga, P.

Walton, N. A.

Bailer-Jones, C. A. L.

Bastian, U.

Cropper, M.

Drimmel, R.

Katz, D.

Soubiran, C.

Van Leeuwen, F.

Audard, M.

Bakker, J.

Blomme, R.

Castañeda, J.

De Angeli, F.

Fabricius, C.

Fouesneau, M.

Frémat, Y.

Guerrier, A.

Masana, E.

Messineo, R.

Nicolas, C.

Nienartowicz, K.

Pailler, F.

Panuzzo, P.

Riclet, F.

Seabroke, G. M.

Sordo, R.

Thévenin, F.

Gracia-Abril, G.

Portell, J.

Teyssier, D.

Altmann, M.

Benson, K.

Berthier, J.

Burgess, P. W.

Busonero, D.

Busso, G.

Cánovas, H.

Carry, B.

Cheek, N.

Clementini, G.

Damerdji, Y.

Davidson, M.

De Teodoro, P.

Dell' Oro, A.

Fraile Garcia, E.

Garabato, D.

García-Lario, P.

Garralda Torres, N.

Gavras, P.

Haigron, R.

Hambly, N. C.

Harrison, D. L.

Hatzidimitriou, D.

Hernández, J.

Hodgkin, S. T.

Holl, B.

Jamal, S.

Jordan, S.

Lanzafame, A. C.

Löffler, W.

Lorca, A.

Marchal, O.

Marrese, P. M.

Moitinho, A.

Muinonen, K.

Nuñez Campos, M.

Osborne, P.

Pancino, E.

Pauwels, T.

Recio-Blanco, A.

Riello, M.

Rimoldini, L.

Robin, A. C.

Roegiers, T.

Sarro, L. M.

Schultheis, M.

Siopis, C.

Smith, M.

Sozzetti, A.

Utrilla, E.

Van Leeuwen, M.

Weingrill, K.

Abbas, U.

Ábrahám, P.

Abreu Aramburu, A.

Aerts, C.

Altavilla, G.

Álvarez, M. A.

Alves, J.

Anderson, R. I.

Antoja, T.

Baines, D.

Baker, S. G.

Balog, Z.

Barache, C.

Barbato, D.

Barros, M.

Barstow, M. A.

Bartolomé, S.

Bashi, D.

Bauchet, N.

Baudeau, N.

Becciani, U.

Bedin, L. R.

Bellas-Velidis, I.

Bellazzini, M.

Beordo, W.

Berihuete, A.

Bernet, M.

Bertolotto, C.

Bertone, S.

Bianchi, L.

Binnenfeld, A.

Boch, T.

Bombrun, A.

Bouquillon, S.

Bragaglia, A.

Bramante, L.

Breedt, E.

Bressan, A.

Brouillet, N.

Brugaletta, E.

Bucciarelli, B.

Butkevich, A. G.

Buzzi, R.

Caffau, E.

Cancelliere, R.

Cannizzo, S.

Carballo, R.

Carlucci, T.

Carnerero, M. I.

Carrasco, J. M.

Carretero, J.

Carton, S.

Casamiquela, L.

Castellani, M.

Castro-Ginard, A.

Cesare, V.

Charlot, P.

Chemin, L.

Chiaramida, V.

Chiavassa, A.

Chornay, N.

Collins, R.

Contursi, G.

Cooper, W. J.

Cornez, T.

Crosta, M.

Crowley, C.

Dafonte, C.

De Laverny, P.

De Luise, F.

De March, R.

De Souza, R.

De Torres, A.

Del Peloso, E. F.

Delbo, M.

Delgado, A.

Dharmawardena, T. E.

Diakite, S.

Diener, C.

Distefano, E.

Dolding, C.

Dsilva, K.

Durán, J.

Enke, H.

Esquej, P.

Fabre, C.

Fabrizio, M.

Faigler, S.

Fatović, M.

Fedorets, G.

Fernández-Hernández, J.

Fernique, P.

Figueras, F.

Fournier, Y.

Fouron, C.

Gai, M.

Galinier, M.

Garcia-Gutierrez, A.

García-Torres, M.

Garofalo, A.

Gerlach, E.

Geyer, R.

Giacobbe, P.

Gilmore, G.

Girona, S.

Giuffrida, G.

Gomel, R.

Gomez, A.

González-Núñez, J.

González-Santamaría, I.

Gosset, E.

Granvik, Mikael

Gregori Barrera, V.

Gutiérrez-Sánchez, R.

Haywood, M.

Helmer, A.

Helmi, A.

Henares, K.

Hidalgo, S. L.

Hilger, T.

Hobbs, D.

Hottier, C.

Huckle, H. E.

Jabłońska, M.

Jansen, F.

Jiménez-Arranz, Ó

Juaristi Campillo, J.

Khanna, S.

Kordopatis, G.

Kóspál, Á

Kostrzewa-Rutkowska, Z.

Kun, M.

Lambert, S.

Lanza, A. F.

Lebreton, Y.

Lebzelter, T.

Leccia, S.

Lecoeur-Taibi, I.

Lecoutre, G.

Liao, S.

Liberato, L.

Licata, E.

Lindstrøm, H. E. P.

Lister, T. A.

Livanou, E.

Lobel, A.

Loup, C.

Mahy, L.

Mann, R. G.

Manteiga, M.

Marchant, J. M.

Marconi, M.

Marín Pina, D.

Marinoni, S.

Marshall, D. J.

Martín Lozano, J.

Martín-Fleitas, J. M.

Marton, G.

Mary, N.

Masip, A.

Massari, D.

Mastrobuono-Battisti, A.

Mazeh, T.

McMillan, P. J.

Meichsner, J.

Messina, S.

Michalik, D.

Millar, N. R.

Mints, A.

Molina, D.

Molinaro, R.

Molnár, L.

Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Eötvös Loránd Research Network (ELKH), MTA Centre of Excellence, Konkoly Thege Miklós út 15 17, 1121 Budapest, Hungary; ELTE Eötvös Loránd University, Institute of Physics, 1117, Pázmány Péter sétány 1A, Budapest, Hungary; MTA CSFK Lendület Near-Field Cosmology Research Group, Konkoly Observatory, MTA Research Centre for Astronomy and Earth Sciences, Konkoly Thege Miklós út 15 17, 1121 Budapest, Hungary.

Monari, G.

Monguió, M.

Montegriffo, P.

Montero, A.

Mor, R.

Mora, A.

Morbidelli, R.

Morel, T.

Morris, D.

Mowlavi, N.

Munoz, D.

Muraveva, T.

Murphy, C. P.

Musella, I.

Nagy, Z.

Nieto, S.

Noval, L.

Ogden, A.

Ordenovic, C.

Pagani, C.

Pagano, I.

Palaversa, L.

Palicio, P. A.

Pallas-Quintela, L.

Panahi, A.

Panem, C.

Payne-Wardenaar, S.

Penttilä, A.

Pesciullesi, P.

Piersimoni, A. M.

Pinamonti, M.

Pineau, F. X.

Plachy, E.

Plum, G.

Poggio, E.

Pourbaix, D.

Prša, A.

Pulone, L.

Racero, E.

Rainer, M.

Raiteri, C. M.

Ramos, P.

Ramos-Lerate, M.

Ratajczak, M.

Re Fiorentin, P.

Regibo, S.

Reylé, C.

Ripepi, V.

Riva, A.

Rix, H. W.

Rixon, G.

Robichon, N.

Robin, C.

Romero-Gómez, M.

Rowell, N.

Royer, F.

Ruz Mieres, D.

Rybicki, K. A.

Sadowski, G.

Sáez Núñez, A.

Sagristà Sellés, A.

Sahlmann, J.

Sanchez Gimenez, V.

Sanna, N.

Santoveña, R.

Sarasso, M.

Sarrate Riera, C.

Sciacca, E.

Segovia, J. C.

Ségransan, D.

Shahaf, S.

Siebert, A.

Siltala, L.

Slezak, E.

Smart, R. L.

Snaith, O. N.

Solano, E.

Solitro, F.

Souami, D.

Souchay, J.

Spina, L.

Spitoni, E.

Spoto, F.

Squillante, L. A.

Steele, I. A.

Steidelmüller, H.

Surdej, J.

Szabados, L.

Taris, F.

Taylor, M. B.

Tisanić, K.

Tolomei, L.

Torra, F.

Torralba Elipe, G.

Trabucchi, M.

Tsantaki, M.

Ulla, A.

Unger, N.

Vanel, O.

Vecchiato, A.

Vicente, D.

Voutsinas, S.

Weiler, M.

Wyrzykowski, Ł

Zhao, H.

Zorec, J.

Zwitter, T.

Balaguer-Núñez, L.

Leclerc, N.

Morgenthaler, S.

Robert, G.

Zucker, S.

Show others...

2024 (English)In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 685, article id A130Article in journal (Refereed) Published

Abstract [en]

Context. Strongly lensed quasars are fundamental sources for cosmology. The Gaia space mission covers the entire sky with the unprecedented resolution of 0.18âÃ Â€ ³ in the optical, making it an ideal instrument to search for gravitational lenses down to the limiting magnitude of 21. Nevertheless, the previous Gaia Data Releases are known to be incomplete for small angular separations such as those expected for most lenses.

Aims. We present the Data Processing and Analysis Consortium GravLens pipeline, which was built to analyse all Gaia detections around quasars and to cluster them into sources, thus producing a catalogue of secondary sources around each quasar. We analysed the resulting catalogue to produce scores that indicate source configurations that are compatible with strongly lensed quasars.

Methods. GravLens uses the DBSCAN unsupervised clustering algorithm to detect sources around quasars. The resulting catalogue of multiplets is then analysed with several methods to identify potential gravitational lenses. We developed and applied an outlier scoring method, a comparison between the average BP and RP spectra of the components, and we also used an extremely randomised tree algorithm. These methods produce scores to identify the most probable configurations and to establish a list of lens candidates.

Results. We analysed the environment of 3 760 032 quasars. A total of 4 760 920 sources, including the quasars, were found within 6âÃ Â€ ³ of the quasar positions. This list is given in the Gaia archive. In 87% of cases, the quasar remains a single source, and in 501 385 cases neighbouring sources were detected. We propose a list of 381 lensed candidates, of which we identified 49 as the most promising ones. Beyond these candidates, the associate tables in this Focused Product Release allow the entire community to explore the unique Gaia data for strong lensing studies further.

Place, publisher, year, edition, pages

EDP Sciences, 2024

Keywords

gravitation, gravitational lensing: strong, methods: data analysis, catalogs, surveys, quasars: general

National Category

Astronomy, Astrophysics and Cosmology

Research subject

Onboard Space Systems

Identifiers

urn:nbn:se:ltu:diva-105779 (URN)10.1051/0004-6361/202347273 (DOI)001271538700001 ()2-s2.0-85194157805 (Scopus ID)

Note

Validerad;2024;Nivå 2;2024-11-28 (sarsun);

Full text license: CC BY 4.0;

Funder: for funder information see Appendix C in https://doi.org/10.1051/0004-6361/202347273

Available from: 2024-06-04 Created: 2024-06-04 Last updated: 2025-04-25Bibliographically approved

Penttilä, A., Muinonen, K., Granvik, M., Gray, Z., Bagnulo, S., Kolokolova, L. & Moreno, F. (2024). Modeling Linear Polarization of the Didymos–Dimorphos System before and after the DART Impact. The Planetary Science Journal, 5(1), Article ID 27.

Open this publication in new window or tab >>Modeling Linear Polarization of the Didymos–Dimorphos System before and after the DART Impact

Penttilä, Antti

Muinonen, Karri

Granvik, Mikael

Gray, Zuri

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2024 (English)In: The Planetary Science Journal, E-ISSN 2632-3338, Vol. 5, no 1, article id 27Article in journal (Refereed) Published

Abstract [en]

We analyze the polarization observations of the Didymos–Dimorphos system before and after the impact by the NASA Double Asteroid Redirection Test spacecraft on Dimorphos. We fit empirical polarization phase curve models and statistically confirm the discovery by Gray et al. about the degree of linear polarization of the system decreasing on the impact and remaining altered for at least 30 days post-impact. With numerical simulations of particles in the geometric optics domain, we estimate the dominant size of the particles either in the regolith of Didymos and Dimorphos or in the impact-driven ejecta cloud to be several hundred micrometers. The observed change between the pre-impact and post-impact systems indicates either a decrease in average particle size of some tens of micrometers or a decreased level of space weathering.

Place, publisher, year, edition, pages

Institute of Physics (IOP), 2024

National Category

Meteorology and Atmospheric Sciences

Research subject

Onboard Space Systems

Identifiers

urn:nbn:se:ltu:diva-104170 (URN)10.3847/psj/ad1757 (DOI)001153641600001 ()2-s2.0-85183945652 (Scopus ID)

Funder

Academy of Finland, 1345115

Note

Validerad;2024;Nivå 1;2024-02-05 (hanlid);

Funder: NASA DART PSP (80NSSC21K1131);

Full text license: CC BY

Available from: 2024-02-05 Created: 2024-02-05 Last updated: 2025-02-07Bibliographically approved

Granvik, M. (2024). Most of Earth’s meteorites come from three young asteroid families. Nature, 634(8034), 553-554

Open this publication in new window or tab >>Most of Earth’s meteorites come from three young asteroid families

Granvik, Mikael

2024 (English)In: Nature, ISSN 0028-0836, E-ISSN 1476-4687, Vol. 634, no 8034, p. 553-554Article in journal, Editorial material (Other academic) Published

Place, publisher, year, edition, pages

Springer Nature, 2024

National Category

Astronomy, Astrophysics and Cosmology

Research subject

Onboard Space Systems

Identifiers

urn:nbn:se:ltu:diva-111992 (URN)10.1038/d41586-024-03051-8 (DOI)001342107700021 ()39415063 (PubMedID)2-s2.0-85206576135 (Scopus ID)

Note

Godkänd;2025;Nivå 0;2025-03-12 (u8);

Available from: 2025-03-12 Created: 2025-03-12 Last updated: 2025-03-21Bibliographically approved

Nesvorný, D., Vokrouhlický, D., Shelly, F., Deienno, R., Bottke, W. F., Christensen, E., . . . Granvik, M. (2024). NEOMOD 2: An updated model of Near-Earth Objects from a decade of Catalina Sky Survey observations. Icarus, 411, Article ID 115922.

Open this publication in new window or tab >>NEOMOD 2: An updated model of Near-Earth Objects from a decade of Catalina Sky Survey observations

Nesvorný, David

Vokrouhlický, David

Shelly, Frank

Deienno, Rogerio

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2024 (English)In: Icarus, ISSN 0019-1035, E-ISSN 1090-2643, Vol. 411, article id 115922Article in journal (Refereed) Published

Place, publisher, year, edition, pages

Elsevier, 2024

National Category

Astronomy, Astrophysics and Cosmology

Research subject

Onboard Space Systems

Identifiers

urn:nbn:se:ltu:diva-103516 (URN)10.1016/j.icarus.2023.115922 (DOI)001140007400001 ()2-s2.0-85180423182 (Scopus ID)

Note

Validerad;2024;Nivå 2;2024-03-14 (signyg);

Funder: Czech Science Foundation (21-11058S)

Available from: 2024-01-08 Created: 2024-01-08 Last updated: 2024-04-04Bibliographically approved

Gray, Z., Bagnulo, S., Granvik, M., Cellino, A., Jones, G. H., Kolokolova, L., . . . Snodgrass, C. (2024). Polarimetry of Didymos–Dimorphos: Unexpected Long-term Effects of the DART Impact. The Planetary Science Journal, 5(1), Article ID 18.

Open this publication in new window or tab >>Polarimetry of Didymos–Dimorphos: Unexpected Long-term Effects of the DART Impact

Gray, Zuri

Bagnulo, Stefano

Granvik, Mikael

Cellino, Alberto

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2024 (English)In: The Planetary Science Journal, E-ISSN 2632-3338, Vol. 5, no 1, article id 18Article in journal (Refereed) Published

Abstract [en]

We have monitored the Didymos–Dimorphos binary system in imaging polarimetric mode before and after the impact from the Double Asteroid Redirection Test mission. A previous spectropolarimetric study showed that the impact caused a dramatic drop in polarization. Our longer-term monitoring shows that the polarization of the post-impact system remains lower than the pre-impact system even months after the impact, suggesting that some fresh ejecta material remains in the system at the time of our observations, either in orbit or settled on the surface. The slope of the post-impact polarimetric curve is shallower than that of the pre-impact system, implying an increase in albedo of the system. This suggests that the ejected material is composed of smaller and possibly brighter particles than those present on the pre-impact surface of the asteroid. Our polarimetric maps show that the dust cloud ejected immediately after the impact polarizes light in a spatially uniform manner (and at a lower level than pre-impact). Later maps exhibit a gradient in polarization between the photocentre (which probes the asteroid surface) and the surrounding cloud and tail. The polarization occasionally shows some small-scale variations, the source of which is not yet clear. The polarimetric phase curve of Didymos–Dimorphos resembles that of the S-type asteroid class.

Place, publisher, year, edition, pages

Institute of Physics (IOP), 2024

National Category

Astronomy, Astrophysics and Cosmology

Research subject

Onboard Space Systems

Identifiers

urn:nbn:se:ltu:diva-103980 (URN)10.3847/psj/ad0f18 (DOI)001147004500001 ()2-s2.0-85183764611 (Scopus ID)

Note

Validerad;2024;Nivå 1;2024-01-29 (hanlid);

Funder: STFC (ST/W001004/1); Academy of Finland (Research Council of Finland) (345115, 336546); NASA DART PS Program (80NSSC21K1131); (PID2021-123370OB-100/AEI/10.13039/501100011033/FEDER),

Full text license: CC BY

Available from: 2024-01-29 Created: 2024-01-29 Last updated: 2024-06-27Bibliographically approved

Lagain, A., Devillepoix, H. A. .., Vernazza, P., Robertson, D., Granvik, M., Pokorny, P., . . . Benedix, G. K. (2024). Recalibration of the lunar chronology due to spatial cratering-rate variability. Icarus, 411, Article ID 115956.

Open this publication in new window or tab >>Recalibration of the lunar chronology due to spatial cratering-rate variability

Lagain, Anthony

Devillepoix, Hadrien A.R.

Vernazza, Pierre

Robertson, Darrel

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2024 (English)In: Icarus, ISSN 0019-1035, E-ISSN 1090-2643, Vol. 411, article id 115956Article in journal (Refereed) Published

Abstract [en]

Cratering chronologies are used to derive the history of planetary bodies and assume an isotropic flux of impactors over the entire surface of the Moon. The impactor population is largely dominated by near-Earth-objects (NEOs) since ∼3.5 billion years ago. However, lunar impact probabilities from the currently known NEO population show an excess of impacts close to the poles compared to the equator as well as a latitudinal dependency of the approach angle of impactors. This is accompanied by a variation of the impact flux and speed with the distance from the apex due to the synchronicity of the lunar orbit around the Earth. Here, we compute the spatial dependency of the cratering rate produced by such variabilities and recalibrate the lunar chronology. We show that it allows to reconcile the crater density measured at mid-latitudes around the Chang'e-5 landing site with the age of the samples collected by this mission. Our updated chronology leads to differences in model ages of up to 30% compared to other chronology systems. The modeled cratering rate variability is then compared with the distribution of lunar craters younger than ∼1 Ma, 1 Ga and 4 Ga. The general trend of the cratering distribution is consistent with the one obtained from dynamical models of NEOs, thus potentially reflecting a nonuniform distribution of orbital parameters of ancient impactor populations, beyond 3.5 Ga ago, i.e., planetary leftovers and cometary bodies. If the nonuniformity of the cratering rate could be tested elsewhere in the Solar System, the recalibrated lunar chronology, corrected from spatial variations of the impact flux and approach conditions of impactors, could be extrapolated on other terrestrial bodies such as Mercury and Mars, at least over the last 3.5 billion years. The modeled cratering rate presented here has strong implications for interpreting results of the Artemis program, aiming to explore the South Pole of our satellite, in particular when it will come to link the radiometric age of the samples collected in this region and the crater density of the sampled units.

Place, publisher, year, edition, pages

Elsevier, 2024

Keywords

Moon, Impact craters, Impact flux, Chang'e 5, Chronology

National Category

Astronomy, Astrophysics and Cosmology

Research subject

Onboard Space Systems

Identifiers

urn:nbn:se:ltu:diva-103776 (URN)10.1016/j.icarus.2024.115956 (DOI)001164823900001 ()2-s2.0-85182556930 (Scopus ID)

Funder

Australian Research Council, DP210100336

Note

Validerad;2024;Nivå 2;2024-01-17 (signyg);

Funder: Curtin University; the Western Australian Government; the Australian Government; the Pawsey Supercomputing Centre ADACS (Astronomy Data and Compute Services); Initiative d'Excellence d'Aix-Marseille Université (A*MIDEX AMX-21-RID-O47); NASA (grant nos. 80NSSC21K0153, 80NSSC19M0217, 80GSFC21M000, 80NSSC19M0089); CSIRO;

Full text license: CC BY-NC-ND

Available from: 2024-01-17 Created: 2024-01-17 Last updated: 2024-03-07Bibliographically approved

Jones, G. H., Snodgrass, C., Tubiana, C., Küppers, M., Kawakita, H., Lara, L. M., . . . Ji, H. (2024). The Comet Interceptor Mission. Space Science Reviews, 220(1), Article ID 9.

Open this publication in new window or tab >>The Comet Interceptor Mission

Jones, Geraint H.

Snodgrass, Colin

Tubiana, Cecilia

Küppers, Michael

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2024 (English)In: Space Science Reviews, ISSN 0038-6308, E-ISSN 1572-9672, Vol. 220, no 1, article id 9Article, review/survey (Refereed) Published

Abstract [en]

Here we describe the novel, multi-point Comet Interceptor mission. It is dedicated to the exploration of a little-processed long-period comet, possibly entering the inner Solar System for the first time, or to encounter an interstellar object originating at another star. The objectives of the mission are to address the following questions: What are the surface composition, shape, morphology, and structure of the target object? What is the composition of the gas and dust in the coma, its connection to the nucleus, and the nature of its interaction with the solar wind? The mission was proposed to the European Space Agency in 2018, and formally adopted by the agency in June 2022, for launch in 2029 together with the Ariel mission. Comet Interceptor will take advantage of the opportunity presented by ESA’s F-Class call for fast, flexible, low-cost missions to which it was proposed. The call required a launch to a halo orbit around the Sun-Earth L2 point. The mission can take advantage of this placement to wait for the discovery of a suitable comet reachable with its minimum Δ V capability of 600 ms − 1 . Comet Interceptor will be unique in encountering and studying, at a nominal closest approach distance of 1000 km, a comet that represents a near-pristine sample of material from the formation of the Solar System. It will also add a capability that no previous cometary mission has had, which is to deploy two sub-probes – B1, provided by the Japanese space agency, JAXA, and B2 – that will follow different trajectories through the coma. While the main probe passes at a nominal 1000 km distance, probes B1 and B2 will follow different chords through the coma at distances of 850 km and 400 km, respectively. The result will be unique, simultaneous, spatially resolved information of the 3-dimensional properties of the target comet and its interaction with the space environment. We present the mission’s science background leading to these objectives, as well as an overview of the scientific instruments, mission design, and schedule.

Place, publisher, year, edition, pages

Springer Nature, 2024

Keywords

Comets, Spacecraft, Instruments – spaceborne and space research

National Category

Astronomy, Astrophysics and Cosmology Fusion, Plasma and Space Physics Aerospace Engineering

Research subject

Onboard Space Systems

Identifiers

urn:nbn:se:ltu:diva-104187 (URN)10.1007/s11214-023-01035-0 (DOI)001194889900001 ()38282745 (PubMedID)2-s2.0-85183417097 (Scopus ID)

Note

Validerad;2024;Nivå 2;2024-12-02 (sarsun);

For funding information, see: https://link.springer.com/article/10.1007/s11214-023-01035-0;

Full text license: CC BY 4.0;

Available from: 2024-02-06 Created: 2024-02-06 Last updated: 2024-12-02Bibliographically approved

Organisations

Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology

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orcid.org/0000-0002-5624-1888

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