Astronomy and Astrophysics – Astrophysics – Earth and Planetary Astrophysics
Scientific paper
2009-12-09
Astrophys.J.732:66,2011
Astronomy and Astrophysics
Astrophysics
Earth and Planetary Astrophysics
receiveded by ApJ
Scientific paper
10.1088/0004-637X/732/2/66
During the late stage of planet formation when Mars-size cores appear, interactions among planetary cores can excite their orbital eccentricities, speed their merges and thus sculpture the final architecture of planet systems. This series of work contributes to the final assembling of planet systems with N-body simulations, including the type I and II migration of planets, gas accretion of massive cores in a viscous disk. In this paper, the standard formulations of type I and II migrations are adopted to investigate the formation of planet systems around solar mass stars. Statistics on the final distributions of planetary masses, semi-major axes and eccentricities are derived, which are comparable to those of the observed systems. Our simulations predict some orbital signatures of planet systems around solar mass stars: 36% of the survival planets are giant planets (Mp>10Me). Most of the massive giant planets (Mp>30Me) locate at 1-10AU. Terrestrial planets distribute more or less evenly at <1-2 AU. Planets in inner orbits (<1 AU) may accumulate at the inner edges of either the protostellar disk (3-5 days) or its MRI dead zone (30-50 days). There is a planet desert in the mass-eccecntricity diagram, i.e., lack of planets with masses 0.005 - 0.08 MJ in highly eccentric orbits (e > 0.3 - 0.4). The average eccentricity (~ 0.15) of the giant planets (Mp>10Me) are bigger than that (~ 0.05) of the terrestrial planets (Mp< 10Me). A planet system with more planets tends to have smaller planet masses and orbital eccentricities on average.
Liu Huigen
Wang Shuang
Zhou Ji-Lin
No associations
LandOfFree
Modeling Planetary System Formation with N-Body Simulations: Role of Gas Disk and Statistics Comparing to Observations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Modeling Planetary System Formation with N-Body Simulations: Role of Gas Disk and Statistics Comparing to Observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modeling Planetary System Formation with N-Body Simulations: Role of Gas Disk and Statistics Comparing to Observations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-276307