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The post-outburst pulsations of the accreting white dwarf in the cataclysmic variable GW Librae
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Chote, Paul and Sullivan, Denis J. (2016) The post-outburst pulsations of the accreting white dwarf in the cataclysmic variable GW Librae. Monthly Notices of the Royal Astronomical Society, 458 (2). pp. 1393-1401. doi:10.1093/mnras/stw421 ISSN 0035-8711.
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Official URL: http://dx.doi.org/10.1093/mnras/stw421
Abstract
We present new time series photometry of the accreting pulsating white dwarf system GW Librae obtained in 2012 and 2013 at the University of Canterbury Mt John Observatory in New Zealand. Our 2012 data show the return of a ∼19 min periodicity that was previously detected in 2008. This pulsation mode was a dominant feature of our quality 2012 May data set, which consisted of six contiguous nights; a detailed analysis indicated a degree of frequency variability. We show by comparison with the previously identified pulsation modes that this periodicity is best explained as a new mode, and that the quasi-stability of the periods appears to be a general feature of the pulsations in these systems. We also find a previously unreported 3-h modulation period, which we believe to be related to the known two and four hour periods of so far unknown origin.
Item Type: | Journal Article | ||||||||||
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Subjects: | Q Science > QB Astronomy | ||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||
Library of Congress Subject Headings (LCSH): | White dwarf stars, Astroseismology | ||||||||||
Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||||||||
Publisher: | Oxford University Press | ||||||||||
ISSN: | 0035-8711 | ||||||||||
Official Date: | 11 May 2016 | ||||||||||
Dates: |
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Volume: | 458 | ||||||||||
Number: | 2 | ||||||||||
Number of Pages: | 9 | ||||||||||
Page Range: | pp. 1393-1401 | ||||||||||
DOI: | 10.1093/mnras/stw421 | ||||||||||
Status: | Peer Reviewed | ||||||||||
Publication Status: | Published | ||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||
Date of first compliant deposit: | 19 April 2016 | ||||||||||
Date of first compliant Open Access: | 20 April 2016 | ||||||||||
Funder: | European Research Council (ERC), Seventh Framework Programme (European Commission) (FP7), Marsden Fund | ||||||||||
Grant number: | 320964 (ERC) | ||||||||||
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