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Evaluating the impact of binary parameter uncertainty on stellar population properties
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Stanway, Elizabeth R., Chrimes, Ashley, Eldridge, J. J. and Stevance, H. F. (2020) Evaluating the impact of binary parameter uncertainty on stellar population properties. Monthly Notices of the Royal Astronomical Society, 495 (4). pp. 4605-4621. doi:10.1093/mnras/staa1166 ISSN 0035-8711.
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WRAP-evaluating-impact-binary-parameter-stellar-population-properties-Stanway-2020.pdf - Accepted Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (3201Kb) | Preview |
Official URL: http://dx.doi.org/10.1093/mnras/staa1166
Abstract
Binary stars have been shown to have a substantial impact on the integrated light of stellar populations, particularly at low metallicity and early ages - conditions prevalent in the distant Universe. But the fraction of stars in stellar multiples as a function of mass, their likely initial periods and distribution of mass ratios are all known empirically from observations only in the local Universe. Each has associated uncertainties. We explore the impact of these uncertainties in binary parameters on the properties of integrated stellar populations, considering which properties and timescales are most susceptible to uncertainty introduced by binary fractions and whether observations of the integrated light might be sufficient to determine binary parameters. We conclude that the effects of uncertainty in the empirical binary parameter distributions are likely smaller than those introduced by metallicity and stellar population age uncertainties for observational data. We identify emission in the He II 1640Å emission line and continuum colour in the ultraviolet-optical as potential indicators of a high mass binary presence, although poorly constrained metallicity, dust extinction and degeneracies in plausible star formation history are likely to swamp any measurable signal.
| 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): | Double stars, Double stars -- Evolution, Double stars -- Masses | |||||||||||||||
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | |||||||||||||||
| Publisher: | Oxford University Press | |||||||||||||||
| ISSN: | 0035-8711 | |||||||||||||||
| Official Date: | July 2020 | |||||||||||||||
| Dates: |
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| Volume: | 495 | |||||||||||||||
| Number: | 4 | |||||||||||||||
| Page Range: | pp. 4605-4621 | |||||||||||||||
| DOI: | 10.1093/mnras/staa1166 | |||||||||||||||
| Status: | Peer Reviewed | |||||||||||||||
| Publication Status: | Published | |||||||||||||||
| Access rights to Published version: | Open Access (Creative Commons) | |||||||||||||||
| Copyright Holders: | © The Author(s) 2020. Published by Oxford University Press on behalf of The Royal Astronomical Society. | |||||||||||||||
| Date of first compliant deposit: | 6 May 2020 | |||||||||||||||
| Date of first compliant Open Access: | 7 May 2020 | |||||||||||||||
| RIOXX Funder/Project Grant: |
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