Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999dps....31.0901b&link_type=abstract
American Astronomical Society, DPS meeting #31, #09.01
Astronomy and Astrophysics
Astronomy
Scientific paper
Fifteen giant planets of mass about 1--13 M_J and eleven brown dwarfs of mass 13--50 M_J have now been discovered by their gravitational effects on solar-like stars. There is reason to believe that these objects have magnetic fields and that they emit meter- or decimeter-wavelength radio radiation through the electron cyclotron maser mechanism. Although the visible and infrared radiation from exoplanets is much weaker than that of the parent stars, the radio emission need not necessarily be. Extremely intense radio emission can be generated by the electron-cyclotron maser instability. For Jupiter the cyclotron-maser radiation is 10(5-10^6) times more intense than its synchrotron emission from the radiation belts and its thermal emission from the disk. If detected from a planet, several important parameters can be deduced, e.g. its rotation period and magnetic field strength. We report the results of searchs for radio emission from a sample of confirmed extrasolar planets and brown dwarfs. The Very Large Array (VLA) was used in late 1996 to observe seven planets and two brown dwarfs at 1400 and 330 MHz. In early 1998, both 47 UMa (planet) and HD98239 (brown dwarf) were observed at 330 and the new 74 MHz system. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.
Bastian Tim S.
Dulk George A.
Leblanc Yolanda
Sault Robert
No associations
LandOfFree
A Search for Radio Emission from Extrasolar Planets does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A Search for Radio Emission from Extrasolar Planets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Search for Radio Emission from Extrasolar Planets will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1554878