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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. 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

Dates:

Date	Event
1 June 2010	Published

Volume:

Vol.715

Number:

No.2

Number of Pages:

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

References:

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