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dc.contributor.authorRosotti, Giovannien
dc.contributor.authorClarke, Catherineen
dc.date.accessioned2018-01-29T10:01:59Z
dc.date.available2018-01-29T10:01:59Z
dc.identifier.issn0035-8711
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/271238
dc.description.abstractA large fraction of stars are in binary systems, yet the evolution of proto-planetary discs in binaries has been little explored from the theoretical side. In this paper we investigate the evolution of the discs surrounding the primary and secondary components of binary systems on the assumption that this is driven by photoevaporation induced by X-rays from the respective star. We show how for close enough separations (20-30 AU for average X-ray luminosities) the tidal torque of the companion changes the qualitative behaviour of disc dispersal from inside out to outside in. Fewer transition discs created by photoevaporation are thus expected in binaries. We also demonstrate that in close binaries the reduction in viscous time leads to accelerated disc clearing around both components, consistent with unresolved observations. When looking at the differential disc evolution around the two components, in close binaries discs around the secondary clear first due to the shorter viscous timescale associated with the smaller outer radius. In wide binaries instead the difference in photo-evaporation rate makes the secondaries longer lived, though this is somewhat dependent on the assumed scaling of viscosity with stellar mass. We find that our models are broadly compatible with the growing sample of resolved observations of discs in binaries. We also predict that binaries have higher accretion rates than single stars for the same disc mass. Thus binaries probably contribute to the observed scatter in the relationship between disc mass and accretion rate in young stars.
dc.description.sponsorshipThis work has been supported by the DISCSIM project, grant agreement 341137 funded by the European Research Council under ERC-2013-ADG, and by the Munich Institute for Astro- and Particle Physics (MIAPP) of the DFG cluster of excellence ‘Origin and Structure of the Universe’.
dc.language.isoenen
dc.publisherOxford University Press
dc.titleThe evolution of photoevaporating viscous discs in binariesen
dc.typeArticle
prism.endingPage5640
prism.publicationNameMonthly Notices of the Royal Astronomical Societyen
prism.startingPage5630
prism.volume473en
dc.identifier.doi10.17863/CAM.18086
dc.identifier.doi10.17863/CAM.18086
dc.identifier.doi10.17863/CAM.18086
dcterms.dateAccepted2017-10-23en
rioxxterms.versionofrecord10.1093/mnras/stx2769en
rioxxterms.versionVoRen
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2017-10-23en
dc.contributor.orcidRosotti, Giovanni [0000-0003-4853-5736]
dc.contributor.orcidClarke, Catherine [0000-0003-4288-0248]
dc.identifier.eissn1365-2966
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idEuropean Research Council (341137)
cam.issuedOnline2017-10-25en
cam.orpheus.successThu Jan 30 13:04:52 GMT 2020 - The item has an open VoR version.*
rioxxterms.freetoread.startdate2100-01-01


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