Vega's hot dust from icy planetesimals scattered inward by an outward-migrating planetary system
| hal.structure.identifier | SSE 2014 | |
| dc.contributor.author | RAYMOND, Sean N. | |
| hal.structure.identifier | Institut de Planétologie et d'Astrophysique de Grenoble [IPAG ] | |
| dc.contributor.author | BONSOR, Amy | |
| dc.date.created | 2014-03-26 | |
| dc.date.issued | 2014 | |
| dc.identifier.issn | 1745-3925 | |
| dc.description.abstractEn | Vega 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.iso | en | |
| dc.publisher | Wiley-Blackwell | |
| dc.title.en | Vega's hot dust from icy planetesimals scattered inward by an outward-migrating planetary system | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1093/mnrasl/slu048 | |
| dc.subject.hal | Physique [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP] | |
| dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP] | |
| dc.subject.hal | Physique [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR] | |
| dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR] | |
| dc.identifier.arxiv | 1403.6821 | |
| bordeaux.journal | Monthly Notice- Royal Astronomical Society -Letters | |
| bordeaux.page | L18-L22 | |
| bordeaux.volume | 442 | |
| bordeaux.issue | 1 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00967215 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00967215v1 | |
| bordeaux.COinS | ctx_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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