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hal.structure.identifierSSE 2014
dc.contributor.authorRAYMOND, Sean N.
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG]
dc.contributor.authorBONSOR, Amy
dc.date.created2014-03-26
dc.date.issued2014
dc.identifier.issn1745-3925
dc.description.abstractEnVega has been shown to host multiple dust populations, including both hot exo-zodiacal dust at sub-AU radii and a cold debris disk extending beyond 100 AU. We use dynamical simulations to show how Vega's hot dust can be created by long-range gravitational scattering of planetesimals from its cold outer regions. Planetesimals are scattered progressively inward by a system of 5-7 planets from 30-60 AU to very close-in. In successful simulations the outermost planets are typically Neptune-mass. The back-reaction of planetesimal scattering causes these planets to migrate outward and continually interact with fresh planetesimals, replenishing the source of scattered bodies. The most favorable cases for producing Vega's exo-zodi have negative radial mass gradients, with sub-Saturn- to Jupiter-mass inner planets at 5-10 AU and outer planets of 2.5 to 20 Earth masses. The mechanism fails if a Jupiter-sized planet exists beyond ~15 AU because the planet preferentially ejects planetesimals before they can reach the inner system. Direct-imaging planet searches can therefore directly test this mechanism.
dc.language.isoen
dc.publisherWiley-Blackwell
dc.title.enVega's hot dust from icy planetesimals scattered inward by an outward-migrating planetary system
dc.typeArticle de revue
dc.identifier.doi10.1093/mnrasl/slu048
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
dc.identifier.arxiv1403.6821
bordeaux.journalMonthly Notice- Royal Astronomical Society -Letters
bordeaux.pageL18-L22
bordeaux.volume442
bordeaux.issue1
bordeaux.peerReviewedoui
hal.identifierhal-00967215
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00967215v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Monthly%20Notice-%20Royal%20Astronomical%20Society%20-Letters&rft.date=2014&rft.volume=442&rft.issue=1&rft.spage=L18-L22&rft.epage=L18-L22&rft.eissn=1745-3925&rft.issn=1745-3925&rft.au=RAYMOND,%20Sean%20N.&BONSOR,%20Amy&rft.genre=article


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