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VLBI observations of the RS Canum Venaticorum binary systems UX Arietis and HR 1099 at 1.65 GHzVLBI observations of the RS CVn binaries UX Arietis and HR 1099 have been made at 1.65 GHz using a three-element array with a minimum fringe spacing of 11.5 milli-arcsec. Both sources were found to be unresolved within measurement uncertainties. In both cases, the derived upper limit to the source size was comparable to the overall size of each binary system. The lower limits to the brightness temperature were 1.4 x 10 to the 10th K for UX Arietis and 2.9 x 10 to the 10th K for HR 1099. Simultaneous polarization measurements at the VLA showed 4-8 percent circular polarization and less than 2 percent linear polarization. It is found that the data are consistent with gyrosynchrotron emission from a power-law energy distribution of electrons in a magnetic field B less than or approximately equal to 6 gauss.
Document ID
19840044886
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)
Doiron, D. J.
(Iowa, University Iowa City, IA, United States)
Phillips, R. B.
(Haystack Observatory Westford, MA, United States)
Lestrade, J. F.
(Iowa Univ. Iowa City, IA, United States)
Date Acquired
August 12, 2013
Publication Date
March 1, 1984
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 278
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
84A27673
Funding Number(s)
CONTRACT_GRANT: NAGW-386
CONTRACT_GRANT: NSF AST-81-10128
CONTRACT_GRANT: NAS7-918
Distribution Limits
Public
Copyright
Other

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