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The bottleneck of CNO burning and the age of Globular Clusters
INAF-Osservatorio Astronomico di Collurania.
Università di Genova.
Ruhr-Universität Bochum, Department of Geography.
Institut für Atomare Physik und Fachdidaktik, Technische Universität Berlin.
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Number of Authors: 302004 (English)In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 420, no 2, p. 625-629Article in journal (Refereed) Published
Abstract [en]

The transition between the Main Sequence and the Red Giant Branch in low mass stars is powered by the onset of CNO burning, whose bottleneck is 14N(p, γ) 15O. The LUNA collaboration has recently improved the low energy measurements of the cross section of this key reaction. We analyse the impact of the revised reaction rate on the estimate of the Globular Cluster ages, as derived from the turnoff luminosity. We found that the age of the oldest Globular Clusters should be increased by about 0.7-1 Gyr with respect to the current estimates.

Place, publisher, year, edition, pages
2004. Vol. 420, no 2, p. 625-629
Keywords [en]
Cosmology: distance scale, Galaxy: formation, Galaxy: globular clusters: general, Nuclear reactions, nucleosynthesis, abundances, Stars: evolution, Stars: population II
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Other Physics Topics
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Experimental Physics
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URN: urn:nbn:se:ltu:diva-6331DOI: 10.1051/0004-6361:20040981ISI: 000222606200024Scopus ID: 2-s2.0-2942620984Local ID: 48f71196-09fd-440b-ab1a-22f9c8108f27OAI: oai:DiVA.org:ltu-6331DiVA, id: diva2:979208
Note

Upprättat; 2004; 20141217 (albvom)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-10-04Bibliographically approved

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Vomiero, Alberto

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  • apa
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  • nn-NB
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  • Other locale
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