GD 552 : a cataclysmic variable with a brown dwarf companion?
Unda-Sanzana, E., Marsh, T. R., Gänsicke, B. T. (Boris T.), Maxted, P. F. L., Morales-Rueda, L., Dhillon, V. S., Thoroughgood, T. D., Tremou, E., Watson, C. A. and Hinojosa-Goni, R.. (2008) GD 552 : a cataclysmic variable with a brown dwarf companion? Monthly Notices of the Royal Astronomical Society, Vol.388 (No.2). pp. 889-897. ISSN 0035-8711Full text not available from this repository.
Official URL: http://dx.doi.org/10.1111/j.1365-2966.2008.13458.x
GD 552 is a high proper motion star with the strong, double-peaked emission lines characteristic of the dwarf nova class of cataclysmic variable (CV) star, and yet no outburst has been detected during the past 12 yr of monitoring. We present spectroscopy taken with the aim of detecting emission from the mass donor in this system. We fail to do so at a level which allows us to rule out the presence of a near-main-sequence star donor. Given GD 552's orbital period of 103 min, this suggests that it is either a system that has evolved through the similar to 80-minute orbital period minimum of CV stars and now has a brown dwarf mass donor, or that has formed with a brown dwarf donor in the first place. This model explains the low observed orbital velocity of the white dwarf and GD 552's low luminosity. It is also consistent with the absence of outbursts from the system.
|Item Type:||Journal Article|
|Subjects:||Q Science > QB Astronomy|
|Divisions:||Faculty of Science > Physics|
|Library of Congress Subject Headings (LCSH):||Accretion (Astrophysics), Double stars, Double stars -- Spectra|
|Journal or Publication Title:||Monthly Notices of the Royal Astronomical Society|
|Date:||1 August 2008|
|Number of Pages:||9|
|Page Range:||pp. 889-897|
|Access rights to Published version:||Restricted or Subscription Access|
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