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SDSS J0926+3624, the first eclipsing AM CVn star, as seen with ULTRACAM
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Marsh, T. R., Dhillon, V. S., Littlefair, S. P., Groot, P. J., Hakala, P., Nelemans, G., Ramsay, G., Roelofs, Gijs H. A. and Steeghs, D. (2007) SDSS J0926+3624, the first eclipsing AM CVn star, as seen with ULTRACAM. In: 15th European Workshop on White Dwarfs, Univ Leicester, Leicester, 7-11 Aug 2006. Published in: 15th European Workshop on White Dwarfs, Proceedings, Volume 372 pp. 431-436. ISBN 9781583812396.
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Official URL: http://www.aspbooks.org/a/volumes/table_of_content...
Abstract
We present light curves of SDSS J0926+3624, the first eclipsing AM CVn star, observed with the high-speed CCD camera ULTRACAM on the WHT. We find, unusually, that the accreting white dwarf is only partially eclipsed by its companion. Apart from this, the system shows the classic eclipse morphology displayed by eclipsing dwarf novae, namely the eclipse of a white dwarf and accretion disc followed by that of the bright spot where the mass transfer stream hits the disc. We are able to fit this well to find masses of the accretor and donor to be M-1 = 0.84 +/- 0.05 M-circle dot and M-2 = 0.029 +/- 0.02 M-circle dot respectively. The mass of the donor is significantly above its zero temperature value and it must possess significant thermal content.
| Item Type: | Conference Item (Paper) | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QB Astronomy | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Series Name: | ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES | ||||
| Journal or Publication Title: | 15th European Workshop on White Dwarfs, Proceedings | ||||
| Publisher: | Astronomical Society of the Pacific | ||||
| ISBN: | 9781583812396 | ||||
| Editor: | Napiwotzki, R and Burleigh, MR | ||||
| Official Date: | 2007 | ||||
| Dates: |
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| Volume: | Volume 372 | ||||
| Number of Pages: | 6 | ||||
| Page Range: | pp. 431-436 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Conference Paper Type: | Paper | ||||
| Title of Event: | 15th European Workshop on White Dwarfs | ||||
| Type of Event: | Workshop | ||||
| Location of Event: | Univ Leicester, Leicester | ||||
| Date(s) of Event: | 7-11 Aug 2006 |
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