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Age dating of old field stars: Challenges from the uncertain efficiency of atomic diffusion

Salaris, M (2016) Age dating of old field stars: Challenges from the uncertain efficiency of atomic diffusion. Astronomische Nachrichten, 337 (8-9). pp. 805-809. ISSN 0004-6337

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Abstract

Copyright © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, WeinheimAge-dating the Milky Way stellar populations plays a major role in studies of galaxy formation and evolution. Ages of old stars that represent the fossil record of the early stages of galaxy formation are particular important. Current spectroscopic surveys provide effective temperature, surface gravity and photospheric composition of large samples of Milky Way stars, and these data can be used to determine stellar ages by employing stellar evolution models. Here it is shown how current uncertainties on the efficiency of atomic diffusion in the interiors of low-mass metal poor stars can affect the derived ages at the level of several 10 %. Asteroseismic constraints on the stellar masses can reduce these errors and in the limit of high accuracy can indirectly constrain the efficiency of diffusion in the interiors of these stars.

Item Type: Article
Additional Information: This is the peer reviewed version of the following article: Salaris, M. (2016), Age dating of old field stars: Challenges from the uncertain efficiency of atomic diffusion. Astron. Nachr., 337: 805–809, which has been published in final form at http://dx.doi.org/10.1002/asna.201612375. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving
Uncontrolled Keywords: 0201 Astronomical And Space Sciences
Subjects: Q Science > QB Astronomy
Divisions: Astrophysics Research Institute
Publisher: Wiley
Date Deposited: 13 Apr 2017 13:05
Last Modified: 13 Apr 2017 13:05
DOI or Identification number: 10.1002/asna.201612375
URI: http://researchonline.ljmu.ac.uk/id/eprint/4608

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