Is CoRoT-7 B the Remnant Core of an Evaporated Gas Giant?
| dc.contributor.author | JACKSON, Brian | |
| hal.structure.identifier | Johns Hopkins University Applied Physics Laboratory [Laurel, MD] [APL] | |
| dc.contributor.author | BARNES, R. | |
| hal.structure.identifier | Observatoire aquitain des sciences de l'univers [OASU] | |
| hal.structure.identifier | Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB] | |
| hal.structure.identifier | Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB] | |
| hal.structure.identifier | Université Sciences et Technologies - Bordeaux 1 [UB] | |
| dc.contributor.author | RAYMOND, Sean N. | |
| dc.contributor.author | FORTNEY, J. | |
| dc.contributor.author | GREENBERG, R. | |
| dc.date.conference | 2010-01-03 | |
| dc.description.abstractEn | The recently discovered planet CoRoT-7 b has a density (5.7 g/cc) consistent with a rocky composition (Leger et al. 2009; Queloz et al. 2009). However, CoRoT-7 b's semi-major axis (0.0172 AU) suggests the planet has a history unlike the planets in our solar system. The strong stellar insolation received by CoRoT-7 b can quickly drive off an atmosphere and may have evaporated a few Earth masses of rocky material during the planet's lifetime. Such rapid mass loss even suggests that CoRoT-7 b may be the remnant core of a hot Jupiter whose gaseous envelope was completely evaporated. Also important are tides, which have drawn the planet in from a more distant, and possibly eccentric, orbit. As the planet neared its host star, the rate of mass loss probably increased dramatically, but mass loss slows tidal migration, resulting in a complex interplay between tides and mass loss. We combine tidal evolution and mass loss models to constrain the range of original orbits and masses of CoRoT-7 b and find, indeed, that CoRoT-7 b may once have been a gas giant planet. We discuss the plausible evolutionary pathways that allow CoRoT-7 b to have begun life as a gas giant. Our results suggest that similar processes may have influenced many other close-in exoplanets as well. Studying the coupled processes of mass loss and tidal migration may thus be crucial to unraveling the origins of the hundreds of hot super-Earths that may soon be discovered by the Kepler and CoRoT missions. | |
| dc.language.iso | en | |
| dc.title.en | Is CoRoT-7 B the Remnant Core of an Evaporated Gas Giant? | |
| dc.type | Communication dans un congrès | |
| 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]/Planétologie et astrophysique de la terre [astro-ph.EP] | |
| bordeaux.country | US | |
| bordeaux.conference.city | Washington, DC | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00447009 | |
| hal.version | 1 | |
| hal.invited | non | |
| hal.proceedings | non | |
| hal.conference.end | 2010-01-07 | |
| hal.popular | non | |
| hal.audience | Non spécifiée | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00447009v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.au=JACKSON,%20Brian&BARNES,%20R.&RAYMOND,%20Sean%20N.&FORTNEY,%20J.&GREENBERG,%20R.&rft.genre=unknown |
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