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Is the Close Binary XY Ursae Majoris a Radio Star?

Published online by Cambridge University Press:  12 April 2016

E.H. Geyer
E.H. Geyer*
Affiliation:
Astronomische Institute der Universität Bonn Observatorium Hoher List

Abstract

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The optical position of the short period eclipsing binary XY UMa, which shows large scale star spot activities, coincides within 2 minutes of arc with a radio source, listed in the 4C-, 4CP-, OK-catalogues, and the position obtained with the Effelsberg radio telescope. A fainter star, centered on the radio source position, is according its U-, B-, V-values a K main sequence star. The radio source is non-thermal, and has a spectral index α ~-0.85. If the radio source is identical with the binary, it would imply important consequences about the extragalactic nature of high latitude 4C-sources, the radio background and the high radio luminosity of the binary.

Type
Part II: Cataclysmic Variables
Information
International Astronomical Union Colloquium , Volume 42: The Interaction of Variable Stars with their Environment , 1977 , pp. 292 - 300
Copyright
Copyright © Veröff. Der Remeis-Sterwarte 1977

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