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3-D structure of the Eta Carinae Nebula & configuration of hyper-velocity jets
2000 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In this thesis the three-dimensional structure of ejected material that surrounds Eta Carinae is investigated. Eta Carinae, situated in the Carina complex at a distance of about 8000 light years from earth, is one of the most massive stars known in our Galaxy. The star had a famous, great eruption in the 1840s and is probably going through the Luminous Blue Variable phase of unsteady mass loss. As a result of this eruption a bipolar nebulae now surrounds the central object, but even further out there is a large amount of filamentary material due to earlier eruptions. In this thesis a three-dimensional model of the ejected material is created by combining astrometric and spectroscopic data. Because of difficulties in determining the positions of ejected clumps in the spectroscopic data, the accuracy in the model is not very high. Anyway, the model visualizes interesting features and makes interpretations easier for the human eye. The thesis also presents a new IDL routine that can be used for analysis of linear features in images. A detailed astrometric and photometric analysis of some long and narrow features in the nebula, called spikes, is performed by using the new routine. Discussion in earlier literature implies that these features are well resolved, but results from this analysis reveal that the spikes are essentially unresolved by the Very Large Telescope and the Hubble Space Telescope (both Wide Field Camera and Planetary Camera).

Place, publisher, year, edition, pages
2000.
Keyword [en]
Technology, Eta Carinae, The Great Eruption, astrometry, doppler, velocities, long-slit spectroscopy
Keyword [sv]
Teknik
Identifiers
URN: urn:nbn:se:ltu:diva-57369ISRN: LTU-EX--00/176--SELocal ID: e0bce9df-e4af-4505-a747-2cb00cdceebbOAI: oai:DiVA.org:ltu-57369DiVA: diva2:1030756
Subject / course
Student thesis, at least 30 credits
Educational program
Civil Engineering programmes 1997-2000, master's level
Examiners
Note
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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  • apa
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  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
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