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

Pfyffer, Samuel; Alibert, Y.; Benz, W.; Swoboda, D. (2015). Theoretical models of planetary system formation II. Post-formation evolution Astronomy & Astrophysics, 579, A37. 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:	Rectorate and Services > Rektorat Rectorate and Services
Name:	Pfyffer, Samuel0000-0002-0225-4974; Alibert, Y.; Benz, W. and Swoboda, D.
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
ISSN:	0004-6361
Language:	English
Submitter:	Samuel Pfyffer
Date Deposited:	19 Nov 2020 12:48
Last Modified:	22 Nov 2020 01:33
Publisher DOI:	10.1051/0004-6361/201424295
ARBOR DOI:	10.24451/arbor.13055
URI:	https://arbor.bfh.ch/id/eprint/13055