Journal
ASTRONOMY & ASTROPHYSICS
Volume 460, Issue 1, Pages 317-322Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361:20065353
Keywords
planets and satellites : general; stars : magnetic fields; stars : winds, outflows; stars : activity
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The observations of enhanced chromospheric activity on HD 179949 as well as on. And with the same periods as their close-in planets seem to indicate some kind of magnetic interaction between star and planet. A constraint to any possible model are the large phase angles of 60 degrees and 169 degrees, respectively. We present a simple model, which is based on the propagation of Alfven waves within the stellar wind flow relative to the planet and which can meet this restriction. In the solar system such a model is successfully used to explain the current system between Io and Jupiter.
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