Other
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21734324p&link_type=abstract
American Astronomical Society, AAS Meeting #217, #343.24; Bulletin of the American Astronomical Society, Vol. 43, 2011
Other
Scientific paper
We study the magnetic field and the planet-star interactions of super Earths, exoplanets with masses between 1 and 10 times the mass of the Earth. We use scaling laws to model the power dissipated due to the magnetic reconnection between the planetary and star magnetic fields. We then apply our model to the recently discovered super Earth GJ 1214 b. We find that the radio emission from the planet can be detectable with ground based instruments (i.e. LOFAR) if GJ 1214 b is a water-rich planet, is not likely to be detectable if GJ 1214 b has an icy, Neptune-like structure, and can be detectable in extreme cases (i.e. a large core radius or large magnetic diffusivity) if GJ 1214 b is a rocky planet. We further generalize our results to other super Earths. We find that, for water rich planets within 10 parsecs away, the peak radio emission frequency is larger than 10 MHz and detectable with LOFAR. Rocky planets have peak frequencies that are only detectable if the core radius or the magnetic diffusivity of the core are large enough. Mini-Neptunes generally have peak emission frequencies lower than 10 MHz and are thus unlikely to be detected from Earth.
Piso Ana-Maria
Rebusco Paola
Seager Sara
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