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The mass of the white dwarf in GW Libra

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van Spaandonk, Lieke, Steeghs, D., Marsh, T. R. and Parsons, S. G. (2010) The mass of the white dwarf in GW Libra. Astrophysical Journal Letters, Vol.715 (No.2). L109-L112. doi:10.1088/2041-8205/715/2/L109

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Official URL: http://dx.doi.org/10.1088/2041-8205/715/2/L109

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Abstract

We report a mass and rotational broadening (v sin i) for the pulsating white dwarf (WD) component of the WZ Sge type Dwarf Nova GW Lib based on high-resolution Very Large Telescope spectroscopy that resolves the Mg II 4481 angstrom absorption feature. Its gravitational redshift combined with WD mass-radius models provides us with a direct measurement of the WD mass of M-1 = 0.84 +/- 0.02 M-circle dot. The line is clearly resolved and if associated with rotational broadening gives v sin i = 87.0 +/- 3.4 km s(-1), equivalent to a spin period of 97 +/- 12 s.

Item Type: Journal Article
Subjects: Q Science > QB Astronomy
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): White dwarf stars, Cataclysmic variable stars
Journal or Publication Title: Astrophysical Journal Letters
Publisher: IOP Publishing Ltd
ISSN: 2041-8205
Official Date: 1 June 2010
Dates:
DateEvent
1 June 2010Published
Volume: Vol.715
Number: No.2
Number of Pages: 4
Page Range: L109-L112
DOI: 10.1088/2041-8205/715/2/L109
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: Science and Technology Facilities Council (Great Britain) (STFC)
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