Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...602l..53i&link_type=abstract
The Astrophysical Journal, Volume 602, Issue 1, pp. L53-L56.
Astronomy and Astrophysics
Astronomy
44
Magnetic Fields, Stars: Planetary Systems, Stars: Atmospheres, Stars: Chromospheres, Stars: Flare
Scientific paper
Numerical simulations using a resistive MHD code are performed in order to investigate the interaction of the magnetospheres of hot Jupiters (or close-in extrasolar giant planets) with the central host stars. Because of the sub-Alfvénic nature of the stellar wind outflow at the orbital positions of these close-in exoplanets, no bow shock would form. When the orientation of the stellar coronal magnetic field is favorable to strong coupling with magnetic reconnection, the power (~1027 ergs s-1) generated could reach the level of a typical solar flare. As a particular type of star-planet atmospheric interaction, as investigated by Cuntz, Saar, & Musielak, magnetospheric interaction as studied in this Letter could lead to extensive energy injection into the auroral zones of the exoplanets, producing massive atmospheric escape process as recently detected.
Hu Juei-Hwa
Huen Ip Wing
Kopp Andreas
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