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Binary fraction indicators in resolved stellar populations and supernova- type ratios
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Stanway, Elizabeth R., Eldridge, J. J. and Chrimes, Ashley (2020) Binary fraction indicators in resolved stellar populations and supernova- type ratios. Monthly Notices of the Royal Astronomical Society, 497 (2). pp. 2201-2212. doi:10.1093/mnras/staa2089
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Official URL: https://doi.org/10.1093/mnras/staa2089
Abstract
The binary fraction of a stellar population can have pronounced effects on its properties, and in particular the number counts of different massive star types, and the relative subtype rates of the supernovae which end their lives. Here we use binary population synthesis models with a binary fraction that varies with initial mass to test the effects on resolved stellar pops and supernovae, and ask whether these can constrain the poorly-known binary fraction in different mass and metallicity regimes. We show that Wolf-Rayet star subtype ratios are valuable binary diagnostics, but require large samples to distinguish by models. Uncertainties in which stellar models would be spectroscopically classified as Wolf-Rayet stars are explored. The ratio of thermonuclear, stripped envelope and other core-collapse supernovae may prove a more accessible test and upcoming surveys will be sufficient to constrain both the high mass and low mass binary fraction in the z < 1 galaxy population.
| Item Type: | Journal Article | ||||||||||||||||||
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| Subjects: | Q Science > QB Astronomy | ||||||||||||||||||
| Divisions: | Faculty of Science > Physics | ||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Astrophysics, Galaxies, Stars -- Formation, Double stars -- Spectra | ||||||||||||||||||
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||||||||||||||||
| Publisher: | Oxford University Press | ||||||||||||||||||
| ISSN: | 1745-3933 | ||||||||||||||||||
| Official Date: | September 2020 | ||||||||||||||||||
| Dates: |
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| Volume: | 497 | ||||||||||||||||||
| Number: | 2 | ||||||||||||||||||
| Page Range: | pp. 2201-2212 | ||||||||||||||||||
| DOI: | 10.1093/mnras/staa2089 | ||||||||||||||||||
| Status: | Peer Reviewed | ||||||||||||||||||
| Publication Status: | Published | ||||||||||||||||||
| Publisher Statement: | This is a pre-copyedited, author-produced version of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record E R Stanway, J J Eldridge, A A Chrimes, Binary fraction indicators in resolved stellar populations and supernova-type ratios, Monthly Notices of the Royal Astronomical Society, Volume 497, Issue 2, September 2020, Pages 2201–2212, is available online at:https://doi.org/10.1093/mnras/staa2089 | ||||||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||||||||||
| RIOXX Funder/Project Grant: |
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