Theoretical models of planetary system formation II. Post-formation evolution

Pfyffer, Samuel Moses; Alibert, Yann; Benz, Willy; Swoboda, David (2015). Theoretical models of planetary system formation II. Post-formation evolution. Astronomy and astrophysics, 579(A37), A37. EDP Sciences 10.1051/0004-6361/201424295

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Aims. We extend the results of planetary formation synthesis by computing the long-term evolution of synthetic systems from the clearing of the gas disk into the dynamical evolution phase. Methods. We use the symplectic integrator SyMBA to numerically integrate the orbits of planets for 100 Myr, using populations from previous studies as initial conditions. Results. We show that within the populations studied, mass and semimajor axis distributions experience only minor changes from post-formation evolution. We also show that, depending upon their initial distribution, planetary eccentricities can statistically increase or decrease as a result of gravitational interactions. We find that planetary masses and orbital spacings provided by planet formation models do not result in eccentricity distributions comparable to observed exoplanet eccentricities, requiring other phenomena, such as stellar fly-bys, to account for observed eccentricities.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences > Theoretical Astrophysics and Planetary Science (TAPS)
08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences
08 Faculty of Science > Physics Institute > NCCR PlanetS

UniBE Contributor:

Pfyffer, Samuel Moses; Alibert, Yann; Benz, Willy and Swoboda, David

Subjects:

500 Science > 520 Astronomy
600 Technology > 620 Engineering
500 Science > 510 Mathematics
500 Science > 530 Physics

ISSN:

0004-6361

Publisher:

EDP Sciences

Language:

English

Submitter:

Katharina Weyeneth-Moser

Date Deposited:

14 Jun 2016 08:18

Last Modified:

02 Sep 2016 14:59

Publisher DOI:

10.1051/0004-6361/201424295

Web of Science ID:

000358877100049

ArXiv ID:

1502.04260

BORIS DOI:

10.7892/boris.81694

URI:

https://boris.unibe.ch/id/eprint/81694

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