Radio Emission from Extrasolar Planets

Details Radio Emission from Extrasolar Planets Radio Emission from Extrasolar Planets

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004iaus..213...73f&link_type=abstract

Bioastronomy 2002: Life Among the Stars, Proceedings of IAU Symposium #213. Edited by R. Norris, and F. Stootman. San Francisco:

Astronomy and Astrophysics

Astronomy

5

Scientific paper

By virtue of their planetary-scale magnetic fields, the Earth and all of the gas giants in our solar system possess solar-wind deformed magnetospheres. The magnetic polar regions of these ``magnetic planets'' produce intense, aurora-related radio emission from solar-wind powered electron currents. Simple scaling laws suggest that Jovian-mass planets close to their host stars should produce radio emission; detecting such emission would be the first direct detection of many of these planets. We describe searches using the Very Large Array (VLA) for radio emission from the planets orbiting HD 114762, 70 Vir, and τ Boo. Our limits are just above those predicted for the planetary emissions. We discuss the possibilities for more stringent limits and the implications that the existing observations have for the planets' radio emissions, and hence on the planetary magnetic fields and stellar wind environments.

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