Rotational period of WD 1953-011 - a magnetic white dwarf with a star-spot
UNSPECIFIED. (2005) Rotational period of WD 1953-011 - a magnetic white dwarf with a star-spot. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 357 (1). pp. 333-337. ISSN 0035-8711Full text not available from this repository.
Official URL: http://dx.doi.org/10.1111/j.1365-2966.2005.08649.x
WD 1953- 011 is an isolated, cool (7920 +/- 200 K) magnetic white dwarf (MWD) with a low average field strength ( similar to 70 kG), and a higher than average mass ( similar to 0.74 M.). Spectroscopic observations taken by Maxted et al. showed variations of equivalent width in the Balmer lines, unusual in a low- field white dwarf. Here we present V- band photometry of WD 1953- 011 taken at seven epochs over a total of 22 months. All of the data sets show a sinusoidal variation of approximately 2 per cent peak- to- peak amplitude. We propose that these variations are due to a star- spot on the MWD, analogous to a sunspot, which is affecting the temperature at the surface, and therefore its photometric magnitude. The variations have a best- fitting period over the entire 22 months of 1.4418 d, which we interpret as the rotational period of the white dwarf.
|Item Type:||Journal Article|
|Subjects:||Q Science > QB Astronomy|
|Journal or Publication Title:||MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY|
|Official Date:||11 February 2005|
|Number of Pages:||5|
|Page Range:||pp. 333-337|
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