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

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.

preprint2011arXivOpen access
N. Madappatt AlikuttyO. De MarcoJ. NordhausM. Wardle
astro-ph.EPastro-ph.SR
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N. Madappatt AlikuttyO. De MarcoJ. NordhausM. Wardle

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