Stars Don't Eat Their Young Migrating Planets - Empirical Constraints On Planet Migration Halting Mechanisms

Details Stars Don't Eat Their Young Migrating Planets - Empirical Constraints On Planet Migration Halting Mechanisms Stars Don't Eat Their Young Migrating Planets - Empirical Constraints On Planet Migration Halting Mechanisms

2011-12-07

arxiv.org/abs/1112.1595v1

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

27 pages, 10 figures, submitted to ApJ

Scientific paper

The discovery of "hot Jupiters" very close to their parent stars confirmed that Jovian planets migrate inward via several potential mechanisms. We present empirical constraints on planet migration halting mechanisms. We compute model density functions of close-in exoplanets in the orbital semi-major axis -- stellar mass plane to represent planet migration that is halted via several mechanisms, including the interior 1:2 resonance with the magnetospheric disk truncation radius, the interior 1:2 resonance with the dust sublimation radius, and tidal dissipation. We also compute model density functions for a planet halting distance that has no dependence on stellar mass to represent migration via external perturbers. We fit these model density functions to empirical distributions of known exoplanets and Kepler candidates that orbit interior to 0.1 AU. Migration halting at the interior 1:2 orbital resonance with the magnetospheric disk truncation radius provides the best fit to the empirical distributions that we test. We can rule out migration halting via tidal dissipation and migration halting at the interior 1:2 resonance with the dust disk sublimation radius. Our results favor a weak dependence of the halting distance with stellar mass, and is consistent with the decline in exoplanet frequency towards smaller orbital radii found in the Kepler candidates sample.

Affiliated with

Also associated with

No associations

Rating

Stars Don't Eat Their Young Migrating Planets - Empirical Constraints On Planet Migration Halting Mechanisms 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 Stars Don't Eat Their Young Migrating Planets - Empirical Constraints On Planet Migration Halting Mechanisms, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stars Don't Eat Their Young Migrating Planets - Empirical Constraints On Planet Migration Halting Mechanisms will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-597032