Journal
ASTROPHYSICAL JOURNAL
Volume 602, Issue 1, Pages L53-L56Publisher
IOP PUBLISHING LTD
DOI: 10.1086/382274
Keywords
magnetic fields; planetary systems; stars : atmosphere; stars : chromospheres; stars : flare
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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-Alfvenic 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 (similar to10(27) 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, & Musietak, 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.
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