Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-01-22
Mon.Not.Roy.Astron.Soc. 350 (2004) 307
Astronomy and Astrophysics
Astrophysics
10 pages, 7 figures, accepted for publication by MNRAS
Scientific paper
10.1111/j.1365-2966.2004.07646.x
The dwarf nova GW Librae is the first cataclysmic variable discovered to have a primary in a white dwarf instability strip, making it the first multi-mode, nonradially-pulsating star known to be accreting. The primaries of CVs, embedded in hot, bright accretion discs, are difficult to study directly. Applying the techniques of asteroseismology to GW Librae could therefore give us an unprecedented look at a white dwarf that has undergone ~10^9 years of accretion. However, an accreting white dwarf may have characteristics sufficiently different from those of single pulsating white dwarfs to render the standard models of white dwarf pulsations invalid for its study. This paper presents amplitude spectra of GW Lib from a series of observing campaigns conducted during 1997, 1998 and 2001. We find that the dominant pulsation modes cluster at periods near 650, 370 and 230 s, which also appear in linear combinations with each other. GW Lib's pulsation spectrum is highly unstable on time-scales of months, and exhibits clusters of signals very closely spaced in frequency, with separations on the order of a few microHz.
Casares Jorge
der Hooft Frank van
Hellier Coel
Kemp John
O'Donoghue Darragh
No associations
LandOfFree
The Nonradially-Pulsating Primary of the Cataclysmic Variable GW Librae does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Nonradially-Pulsating Primary of the Cataclysmic Variable GW Librae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Nonradially-Pulsating Primary of the Cataclysmic Variable GW Librae will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-384575