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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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WRAP_Steeghs_GW_Libra_1004.3065v1 (2).pdf - Accepted Version Download (371Kb) | Preview |
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 |
| 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: | |
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| URI: | http://wrap.warwick.ac.uk/id/eprint/5734 |
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