Evaluating the impact of binary parameter uncertainty on stellar population properties

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dc.contributor.author Stanway, ER en
dc.contributor.author Chrimes, AA en
dc.contributor.author Eldridge, John en
dc.contributor.author Stevance, Fanny en
dc.date.accessioned 2020-06-05T00:08:01Z en
dc.date.issued 2020-04-30 en
dc.identifier.citation Monthly Notices of the Royal Astronomical Society 30 Apr 2020 en
dc.identifier.issn 0035-8711 en
dc.identifier.uri http://hdl.handle.net/2292/51351 en
dc.description.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 1640 Angstrom 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. en
dc.publisher Oxford University Press (OUP) en
dc.relation.ispartofseries Monthly Notices of the Royal Astronomical Society en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. en
dc.rights https://creativecommons.org/licenses/by/4.0/ en
dc.rights This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record is available online at: http://dx.doi.org/10.1093/mnras/staa1166 en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.rights.uri https://arxiv.org/licenses/nonexclusive-distrib/1.0/license.html en
dc.subject astro-ph.GA en
dc.subject astro-ph.GA en
dc.subject astro-ph.SR en
dc.title Evaluating the impact of binary parameter uncertainty on stellar population properties en
dc.type Journal Article en
dc.identifier.doi 10.1093/mnras/staa1166 en
dc.rights.holder Copyright: The authors en
pubs.author-url http://arxiv.org/abs/2004.11913v1 en
dc.rights.accessrights http://purl.org/eprint/accessRights/OpenAccess en
pubs.subtype Article en
pubs.elements-id 800917 en
pubs.org-id Science en
pubs.org-id Physics en
pubs.arxiv-id 2004.11913 en
pubs.record-created-at-source-date 2020-06-05 en

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