A magnetic communication scenario for hot Jupiters

Details A magnetic communication scenario for hot Jupiters A magnetic communication scenario for hot Jupiters

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006a%26a...460..317p&link_type=abstract

Astronomy and Astrophysics, Volume 460, Issue 1, December II 2006, pp.317-322

Astronomy and Astrophysics

Astrophysics

27

Planets And Satellites: General, Stars: Magnetic Fields, Stars: Winds, Outflows, Stars: Activity

Scientific paper

The observations of enhanced chromospheric activity on HD 179949 as well as on υ 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° and 169°, respectively. We present a simple model, which is based on the propagation of Alfvén 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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