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RW Tauri as a weak W Serpentis starObservations of the short-period eclipsing binary RW Tau made with the LWR and SWP cameras of the IUE satellite and with the ITS scanner at the 3-m Shane telescope of the Lick Observatory in August and October, 1982, are reported and analyzed. At total eclipse, weak excess continuous radiation in the LWR range and emission lines at Si IV (1), C IV (1), Al III (1), Fe III (34), and Mg II (1) in the SWP range were detected. These findings are similar to those for W Ser-type binaries such as U Cep. The parameters of the system are estimated using a bilinearly interpolated atmospheric model of the type developed by Kurucz (1979): primary-star T(eff) = 11,750 K, log g = 4.2, cool-component spectral type = K0 III, E(B-V) color excess = 0.14 mag, system distance = 270 pc. The implications of these findings for proposed models of the W Ser binaries are discussed, and the observation of a possible distant optical companion star 45 arcsec from RW Tau is reported.
Document ID
19830064332
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Plavec, M. J.
(California Univ. Los Angeles, CA, United States)
Dobias, J. J.
(California, University Los Angeles, CA, United States)
Date Acquired
August 11, 2013
Publication Date
September 1, 1983
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 272
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
83A45550
Funding Number(s)
CONTRACT_GRANT: NSF AST-82-00046
CONTRACT_GRANT: NSG-5275
Distribution Limits
Public
Copyright
Other

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