Towards a New Prescription for the Tidal Capture of Planets, Brown Dwarfs and Stellar Companions

Details Towards a New Prescription for the Tidal Capture of Planets, Brown Dwarfs and Stellar Companions Towards a New Prescription for the Tidal Capture of Planets, Brown Dwarfs and Stellar Companions

2011-02-02

arxiv.org/abs/1102.0513v1

AIP Conference Proceedings, Volume 1331, pp. 319-323 (2011)

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

Part of PlanetsbeyondMS/2010 proceedings http://arxiv.org/html/1011.6606

Scientific paper

10.1063/1.3570994

We study the evolution of the orbit of a planetary companion as the primary star evolves during the red giant branch phase. Our aim is to determine a prescription for the capture radius and capture timescales for companions in a wide range of masses, from planet to star, including the effect of a non constant f parameter. Our initial results reproduce past findings. According to our study the mass-loss during the red giant branch does not significantly affect the semi major axis of the planet and for a 1.5 M star the capture radius is approximately 300 R or 1.4 AU.

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