J/ApJ/612/511 Exoplanet radio emission (Lazio+, 2004)
The radiometric Bode's law and extrasolar planets.
Lazio T.J.W., Farrell W.M., Dietrick J., Greenlees E., Hogan E., Jones C.,
Hennig L.A.
<Astrophys. J., 612, 511-518 (2004)>
=2004ApJ...612..511L 2004ApJ...612..511L
ADC_Keywords: Magnetic fields ; Radio sources ; Planets
Keywords: magnetic fields - radio continuum: stars - solar wind
Abstract:
We predict the radio flux densities of the extrasolar planets in the
current census, making use of an empirical relation - the radiometric
Bode's law - determined from the five "magnetic" planets in the solar
system (the Earth and the four gas giants). Radio emission from these
planets results from solar wind-powered electron currents depositing
energy in the magnetic polar regions. We find that most of the known
extrasolar planets should emit in the frequency range 10-1000 MHz and,
under favorable circumstances, have typical flux densities as large as
1mJy. We also describe an initial, systematic effort to search for
radio emission in low radio frequency images acquired with the Very
Large Array (VLA). The limits set by the VLA images (∼300mJy) are
consistent with, but do not provide strong constraints on, the
predictions of the model.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 45 113 Exoplanet radio emission
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Name Star name (1)
17- 20 F4.2 --- omega Planet's rotation rate relative to Jupiter's rate
22- 26 F5.2 [W] logP Log of the predicted power
28- 32 F5.1 --- mu The µ value (2)
34- 39 F6.1 MHz nu Frequency
41- 44 F4.1 [Jy] logS ? Log of the predicted burst flux density
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Note (1): Planets are arranged roughly in order of increasing semi-major axis.
Note (2): In units of Jupiter radii times the gravitational constant.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 23-Mar-2005