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The mass of the white dwarf in GW Libra

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van Spaandonk, Lieke, Steeghs, D. (Danny), 1972-, 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. ISSN 2041-8205

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

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 > 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
Volume:	Vol.715
Number:	No.2
Number of Pages:	4
Page Range:	L109-L112
Identification Number:	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)
Related URLs:	Other Repository
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URI:	http://wrap.warwick.ac.uk/id/eprint/5734