Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...282..667g&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 282, July 15, 1984, p. 667-674.
Astronomy and Astrophysics
Astrophysics
18
Eclipsing Binary Stars, Heao 2, Light Curve, Shell Stars, Stellar Envelopes, X Ray Sources, Binary Stars, Interstellar Extinction, Iue, Main Sequence Stars, Photosphere, Stellar Radiation
Scientific paper
Several evolved close binaries and shell stars were observed with the IPC aboard the HEAO 2 Einstein Observatory. No eclipsing target was detected, and only two of the shell binaries were detected. It is argued that there is no substantial difference in L(X) for eclipsing and non-eclipsing binaries. The close binary and shell star CX Dra was detected as a moderately strong source, and the best interpretation is that the X-ray flux arises primarily from the corona of the cool member of the binary at about the level of Algol-like or RS CVn-type sources. The residual visible-band light curve of this binary has been modeled so as to conform as well as possible with this interpretation. HD 51480 was detected as a weak source. Substantial background information from IUE and ground scanner measurements are given for this binary. The positions and flux values of several accidentally detected sources are given.
Guinan Edward F.
Koch Robert H.
Plavec Mirek J.
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