Formation, tidal evolution and habitability of the Kepler-186 system
| hal.structure.identifier | SSE 2014 | |
| dc.contributor.author | BOLMONT, Emeline | |
| hal.structure.identifier | SSE 2014 | |
| dc.contributor.author | RAYMOND, Sean N. | |
| dc.contributor.author | VON PARIS, P. | |
| hal.structure.identifier | SSE 2014 | |
| dc.contributor.author | SELSIS, Franck | |
| hal.structure.identifier | FORMATION STELLAIRE 2014 | |
| dc.contributor.author | HERSANT, F. | |
| dc.contributor.author | QUINTANA, Elisa V. | |
| dc.contributor.author | BARCLAY, Thomas | |
| dc.date.created | 2014-04-16 | |
| dc.date.issued | 2014 | |
| dc.identifier.issn | 0004-637X | |
| dc.description.abstractEn | The Kepler-186 system consists of five planets orbiting an early-M dwarf. The planets have physical radii of 1.0-1.50 R$_\oplus$ and orbital periods of 4 to 130 days. The $1.1~$R$_\oplus$ Kepler-186f with a period of 130 days is of particular interest. Its insolation of roughly $0.32~S_\odot$places it within the liquid water habitable zone. We present a multi-faceted study of the Kepler-186 system. First, we show that the distribution of planet masses can be roughly reproduced if the planets accreted from a high-surface density disk presumably sculpted by an earlier phase of migration. However, our simulations predict the existence of 1-2 undetected planets between planets e and f. Next, we present a dynamical analysis of the system including the effect of tides. The timescale for tidal evolution is short enough that the four inner planets must have small obliquities and near-synchronous rotation rates. Tidal evolution of Kepler-186f is slow enough that its current spin state depends on a combination of its dissipation rate and the stellar age. Finally, we study the habitability of Kepler-186f with a 1-D climate model. The planet's surface temperature can be raised above 273 K with 0.5-5 bars of CO$_2$, depending on the amount of N$_2$ present. Kepler-186f represents a case study of an Earth-sized planet in the cooler regions of the habitable zone of a cool star. | |
| dc.language.iso | en | |
| dc.publisher | American Astronomical Society | |
| dc.title.en | Formation, tidal evolution and habitability of the Kepler-186 system | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1088/0004-637X/793/1/3 | |
| 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.identifier.arxiv | 1404.4368 | |
| bordeaux.journal | The Astrophysical Journal | |
| bordeaux.page | id. 3 | |
| bordeaux.volume | 793 | |
| bordeaux.issue | 1 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00981324 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00981324v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=The%20Astrophysical%20Journal&rft.date=2014&rft.volume=793&rft.issue=1&rft.spage=id.%203&rft.epage=id.%203&rft.eissn=0004-637X&rft.issn=0004-637X&rft.au=BOLMONT,%20Emeline&RAYMOND,%20Sean%20N.&VON%20PARIS,%20P.&SELSIS,%20Franck&HERSANT,%20F.&rft.genre=article |
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