Towards a New Prescription for the Tidal Capture of Planets, Brown Dwarfs and Stellar Companions
Abstract
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 ƒ 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 Msolar star the capture radius is approximately 300 Rsolar or 1.4 AU.
- Publication:
-
Planetary Systems Beyond the Main Sequence
- Pub Date:
- March 2011
- DOI:
- 10.1063/1.3556219
- arXiv:
- arXiv:1102.0513
- Bibcode:
- 2011AIPC.1331..319M
- Keywords:
-
- brown dwarfs;
- stellar evolution;
- supernovae;
- convection;
- 97.20.Vs;
- 97.60.Lf;
- 97.60.Bw;
- 95.30.Tg;
- Low luminosity stars subdwarfs and brown dwarfs;
- Black holes;
- Supernovae;
- Thermodynamic processes conduction convection equations of state;
- Astrophysics - Earth and Planetary Astrophysics;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- Part of PlanetsbeyondMS/2010 proceedings http://arxiv.org/html/1011.6606