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dc.contributor.authorTokovinin, Andrei
dc.contributor.authorMoe, Maxwell
dc.date.accessioned2020-03-31T18:22:10Z
dc.date.available2020-03-31T18:22:10Z
dc.date.issued2019-11-26
dc.identifier.citationAndrei Tokovinin, Maxwell Moe, Formation of close binaries by disc fragmentation and migration, and its statistical modelling, Monthly Notices of the Royal Astronomical Society, Volume 491, Issue 4, February 2020, Pages 5158–5171, https://doi.org/10.1093/mnras/stz3299en_US
dc.identifier.issn0035-8711
dc.identifier.doi10.1093/mnras/stz3299
dc.identifier.urihttp://hdl.handle.net/10150/638367
dc.description.abstractJoint statistics of periods and mass ratios of close binaries and its dependence on primary mass can be explained by assuming that seed binary companions are formed by disc fragmentation at random intervals during assemblage of stellar mass and migrate inwards as they accrete from the circumbinary disc. A toy model based on simple prescriptions for the companion growth and migration reproduces such aspects of close solar-mass binaries as the distribution of binary periods P, the brown dwarf desert at short P, the nearly uniform distribution of mass ratios, and a population of equal-mass binaries (twins) that decreases linearly in frequency with log P. For massive stars, the model predicts a large fraction of early mergers, a distribution of log P with a negative slope, and a mass-ratio distribution that is also uniform but with a substantially reduced twin fraction. By treating disc fragmentation as a stochastic process, we also reproduce the observed properties of compact triples. Success of our toy model suggests that most close binaries and compact triples indeed formed by disc fragmentation followed by accretion-driven inward migration.en_US
dc.language.isoenen_US
dc.publisherOXFORD UNIV PRESSen_US
dc.rightsCopyright © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model)en_US
dc.rights.urihttps://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_modelen_US
dc.subjectbinaries: closeen_US
dc.subjectbinaries: generalen_US
dc.subjectbinaries: spectroscopicen_US
dc.subjectstars: formationen_US
dc.titleFormation of close binaries by disc fragmentation and migration, and its statistical modellingen_US
dc.typeArticleen_US
dc.contributor.departmentUniv Arizona, Steward Observen_US
dc.identifier.journalMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETYen_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US
dc.source.journaltitleMonthly Notices of the Royal Astronomical Society
dc.source.volume491
dc.source.issue4
dc.source.beginpage5158
dc.source.endpage5171
refterms.dateFOA2020-03-31T18:22:11Z


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