On the Fate of Close-in Extrasolar Planets

Details On the Fate of Close-in Extrasolar Planets On the Fate of Close-in Extrasolar Planets

2002-09-04

arxiv.org/abs/astro-ph/0209061v1

Astrophys.J. 582 (2003) 449-454

Astronomy and Astrophysics

Astrophysics

15 pages, accepted for publication in ApJ

Scientific paper

10.1086/344590

It has been shown that there is a possible mass-period correlation for extrasolar planets from the current observational data and this correlation is, in fact, related to the absence of massive close-in planets, which are strongly influenced by the tidal interaction with the central star. We confirm that the model in P\"atzold & Rauer (2002) is a good approximation for the explanation of the absence of massive close-in planets. We thus further determine the minimum possible semimajor axis for these planets to be detected during their lifetime and also study their migration time scale at different semimajor axes by the calculations of tidal interaction. We conclude that the mass-period correlation at the time when these planets were just formed was less tight than it is now observed if these orbital migrations are taken into account.

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