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Multiple wavelength microwave observations of the RS Canum Venaticorum stars UX Arietis, HR 1099, HR 5110, and II PegasiThe variabilities, core size and magnetic field of the RS CVn star UX Arietis was measured with the VLA at pairs of frequencies near 1415 MHz and 4835 MHz on June 10, 1985. Data were also gathered on HR 1099, HR 5110 and II Peg. UX Arietis exhibited variability on time scales ranging from 30 sec to 1 hr at 4835 MHz, but no detectable variations at 1415 MHz. An upper limit of 900 billion cm was placed on the size of the core emitting region, which is estimated to have a magnetic field strength of 15 G. The 30 sec variations are attributed to absorption by thermal plasma between the G5 and K1 companions of the UX Arietis system.
Document ID
19870042253
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Willson, Robert F.
(Tufts Univ. Medford, MA, United States)
Lang, Kenneth R.
(Tufts University Medford, MA, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 312
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
87A29527
Funding Number(s)
CONTRACT_GRANT: NAG5-477
CONTRACT_GRANT: AF-AFOSR-83-0019
CONTRACT_GRANT: N00014-86-K-0068
Distribution Limits
Public
Copyright
Other

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