HS 2331+3905, the brightest CV white dwarf pulsator
Gänsicke, B. T. (Boris T.) (2007) HS 2331+3905, the brightest CV white dwarf pulsator. In: 15th European Workshop on White Dwarfs, Univ Leicester, Leicester, ENGLAND, AUG 07-11, 2006. Published in: 15TH EUROPEAN WORKSHOP ON WHITE DWARFS, PROCEEDINGS, 372 pp. 597-602.Full text not available from this repository.
We report preliminary results of infrared spectroscopy and of a multi-site photometric campaign on the brightest pulsating white dwarf in a cataclysmic variable (CV), HS 2331+ 3905. The Gemini J, H, and K spectra fail to reveal a clear signature of the donor star, constraining its spectral type to be L2 or later. The presence of two short-period signals at 67.62 s and 67.24 s is confirmed, and we identify the 67.62 s signal unambiguously as the white dwarf spin. Our photometric data shows that the ZZ Ceti pulsations detected near 5 min are extremely complex, with the dominant frequencies varying oil time scales of hours. We suggest that the complex pulsation pattern is related to the extremely rapid rotation of the white dwarf.
|Item Type:||Conference Item (UNSPECIFIED)|
|Subjects:||Q Science > QB Astronomy|
|Divisions:||Faculty of Science > Physics|
|Series Name:||ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES|
|Journal or Publication Title:||15TH EUROPEAN WORKSHOP ON WHITE DWARFS, PROCEEDINGS|
|Publisher:||ASTRONOMICAL SOC PACIFIC|
|Editor:||Napiwotzki, R and Burleigh, MR|
|Number of Pages:||6|
|Page Range:||pp. 597-602|
|Title of Event:||15th European Workshop on White Dwarfs|
|Location of Event:||Univ Leicester, Leicester, ENGLAND|
|Date(s) of Event:||AUG 07-11, 2006|
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