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Radio emission from RS CVn binaries. II - Polarization and spectral propertiesMultiepoch radio observations of circular polarization and spectral characteristics of several close, late-type stellar binaries are reported. The median luminosity of four well-studied systems ranged from 16.2 to 17.1 ergs/s/Hz. For individual systems, the fractional circular polarization decreases with increasing luminosity, particularly at frequencies above 5 GHz. Eclipsing binaries have significantly lower average circular polarization compared with noneclipsing systems. Helicity reversal is almost always observed between 1.4 and 4.9 GHz for systems with high orbital inclination. Comparison with ten years of previously published polarization observations for two RS CVn stellar systems show that the same helicity occurs at a given frequency for a given source, indicating a very stable, large-scale magnetic field geometry. These spectral and polarization characteristics strongly support a model of inhomogeneous gyrosynchrotron emission arising from electrons with power law energy spectra interacting with inhomogeneous magnetic fields.
Document ID
19870053195
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Mutel, R. L.
(Iowa Univ. Iowa City, IA, United States)
Morris, D. H.
(Iowa, University Iowa City, United States)
Doiron, D. J.
(Scranton, University PA, United States)
Lestrade, J. F.
(Bureau des Longitudes, Paris, France; California Institute of Technology Jet Propulsion Laboratory, United States)
Date Acquired
August 13, 2013
Publication Date
May 1, 1987
Publication Information
Publication: Astronomical Journal
Volume: 93
ISSN: 0004-6256
Subject Category
Astrophysics
Accession Number
87A40469
Funding Number(s)
CONTRACT_GRANT: NAGW-386
Distribution Limits
Public
Copyright
Other

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