Planet-planet scattering as the source of the highest eccentricity exoplanets
| dc.contributor.author | CARRERA, Daniel | |
| hal.structure.identifier | ECLIPSE 2019 | |
| dc.contributor.author | RAYMOND, Sean N. | |
| hal.structure.identifier | Lund Observatory | |
| dc.contributor.author | DAVIES, Melvyn B. | |
| dc.date.issued | 2019 | |
| dc.identifier.issn | 0004-6361 | |
| dc.description.abstractEn | Most giant exoplanets discovered by radial velocity surveys have much higher eccentricities than those in the Solar System. The planet-planet scattering mechanism has been shown to match the broad eccentricity distribution, but the highest-eccentricity planets are often attributed to Kozai-Lidov oscillations induced by a stellar companion. Here we investigate whether the highly eccentric exoplanet population can be produced entirely by scattering. We ran 500 N-body simulations of closely packed giant planet systems that became unstable under their own mutual perturbations. We find that the surviving bound planets can have eccentricities up to $e > 0.99$. In other words, there is no maximum eccentricity that can be produced by planet-planet scattering. Furthermore, the eccentricity distribution for all giant exoplanets with $e > 0.3$ is consistent with it all being generated by scattering. Our results show that the discovery of planets with extremely high eccentricities does not necessarily signal the action of the Kozai-Lidov mechanism. | |
| dc.language.iso | en | |
| dc.publisher | EDP Sciences | |
| dc.rights.uri | http://creativecommons.org/licenses/by/ | |
| dc.subject.en | Astrophysics - Earth and Planetary Astrophysics | |
| dc.title.en | Planet-planet scattering as the source of the highest eccentricity exoplanets | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1051/0004-6361/201935744 | |
| dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP] | |
| dc.subject.hal | Planète et Univers [physics] | |
| bordeaux.journal | Astronomy and Astrophysics - A&A | |
| bordeaux.page | L7 | |
| bordeaux.volume | 629 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-02061451 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-02061451v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astronomy%20and%20Astrophysics%20-%20A&A&rft.date=2019&rft.volume=629&rft.spage=L7&rft.epage=L7&rft.eissn=0004-6361&rft.issn=0004-6361&rft.au=CARRERA,%20Daniel&RAYMOND,%20Sean%20N.&DAVIES,%20Melvyn%20B.&rft.genre=article |
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