Is there an exoplanet in the Solar System?
| dc.contributor.author | MUSTILL, Alexander J., | |
| hal.structure.identifier | ECLIPSE 2016 | |
| dc.contributor.author | RAYMOND, Sean N. | |
| hal.structure.identifier | University of Cape Town | |
| dc.contributor.author | DAVIES, Melvyn B., | |
| dc.date.issued | 2016-03 | |
| dc.identifier.issn | 1745-3933 | |
| dc.description.abstractEn | We investigate the prospects for the capture of the proposed Planet 9 from other stars in the Sun's birth cluster. Any capture scenario must satisfy three conditions: the encounter must be more distant than ~150 au to avoid perturbing the Kuiper belt; the other star must have a wide-orbit planet (a>~100au); the planet must be captured onto an appropriate orbit to sculpt the orbital distribution of wide-orbit Solar System bodies. Here we use N-body simulations to show that these criteria may be simultaneously satisfied. In a few percent of slow close encounters in a cluster, bodies are captured onto heliocentric, Planet 9-like orbits. During the ~100 Myr cluster phase, many stars are likely to host planets on highly-eccentric orbits with apastron distances beyond 100 au if Neptune-sized planets are common and susceptible to planet--planet scattering. While the existence of Planet 9 remains unproven, we consider capture from one of the Sun's young brethren a plausible route to explain such an object's orbit. Capture appears to predict a large population of Trans-Neptunian Objects (TNOs) whose orbits are aligned with the captured planet, and we propose that different formation mechanisms will be distinguishable based on their imprint on the distribution of TNOs. | |
| dc.language.iso | en | |
| dc.publisher | Oxford Journals | |
| dc.subject.en | Astrophysics - Earth and Planetary Astrophysics | |
| dc.title.en | Is there an exoplanet in the Solar System? | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1093/mnrasl/slw075 | |
| dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP] | |
| dc.identifier.arxiv | 1603.07247 | |
| bordeaux.journal | Monthly Notices of the Royal Astronomical Society: Letters | |
| bordeaux.page | L109-L113 | |
| bordeaux.volume | 460 | |
| bordeaux.issue | 1 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-01293594 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-01293594v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Monthly%20Notices%20of%20the%20Royal%20Astronomical%20Society:%20Letters&rft.date=2016-03&rft.volume=460&rft.issue=1&rft.spage=L109-L113&rft.epage=L109-L113&rft.eissn=1745-3933&rft.issn=1745-3933&rft.au=MUSTILL,%20Alexander%20J.,&RAYMOND,%20Sean%20N.&DAVIES,%20Melvyn%20B.,&rft.genre=article |
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