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The not-so-extreme white dwarf of the CV GD 552

By E. Unda-Sanzana, T. R. Marsh, B. T. (Boris T.) Gänsicke, P. F. L. Maxted, L. Morales-Rueda, V. S. Dhillon, T. D. Thoroughgood, E. Tremou, C. A. Watson and R. Hinojosa-Goni

Abstract

GD 552 is a cataclysmic binary which was previously believed to be composed of an M-star and a white dwarf, the latter having an extreme mass of 1.4 solar masses. In a recent paper we showed that this is not compatible with new observational evidence and presented an alternative model in which the white dwarf has a typical mass and the companion is a brown dwarf, making the system a likely member of the elusive group of CVs which have already evolved through minimum orbital period. Here we present additional spectroscopical evidence supporting this conclusion by means of skew mapping

Topics: QB
Publisher: Institute of Physics Publishing Ltd.
Year: 2009
DOI identifier: 10.1088/1742-6596/172/1/012041
OAI identifier: oai:wrap.warwick.ac.uk:40194
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