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Reevaluating old stellar populations
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Stanway, Elizabeth R. and Eldridge, J. J. (2018) Reevaluating old stellar populations. Monthly Notices of the Royal Astronomical Society, 479 (1). pp. 75-93. sty1353. doi:10.1093/mnras/sty1353 ISSN 1365-2966.
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Official URL: http://dx.doi.org/10.1093/mnras/sty1353
Abstract
Determining the properties of old stellar populations (those with age >1 Gyr) has long involved the comparison of their integrated light, either in the form of photometry or spectroscopic indexes, with empirical or synthetic templates. Here we reevaluate the properties of old stellar populations using a new set of stellar population synthesis models, designed to incorporate the effects of binary stellar evolution pathways as a function of stellar mass and age. We find that single-aged stellar population models incorporating binary stars, as well as new stellar evolution and atmosphere models, can reproduce the colours and spectral indices observed in both globular clusters and quiescent galaxies. The best fitting model populations are often younger than those derived from older spectral synthesis models, and may also lie at slightly higher metallicities.
Item Type: | Journal Article | ||||||||||||||||||||||||||||||
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Subjects: | Q Science > QB Astronomy | ||||||||||||||||||||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Galaxies, Double stars, Photometry | ||||||||||||||||||||||||||||||
Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||||||||||||||||||||||||||||
Publisher: | Oxford University Press | ||||||||||||||||||||||||||||||
ISSN: | 1365-2966 | ||||||||||||||||||||||||||||||
Official Date: | September 2018 | ||||||||||||||||||||||||||||||
Dates: |
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Volume: | 479 | ||||||||||||||||||||||||||||||
Number: | 1 | ||||||||||||||||||||||||||||||
Page Range: | pp. 75-93 | ||||||||||||||||||||||||||||||
Article Number: | sty1353 | ||||||||||||||||||||||||||||||
DOI: | 10.1093/mnras/sty1353 | ||||||||||||||||||||||||||||||
Status: | Peer Reviewed | ||||||||||||||||||||||||||||||
Publication Status: | Published | ||||||||||||||||||||||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||||||||||||||||||||||
Date of first compliant deposit: | 23 May 2018 | ||||||||||||||||||||||||||||||
Date of first compliant Open Access: | 30 May 2018 | ||||||||||||||||||||||||||||||
RIOXX Funder/Project Grant: |
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