文章基本信息

标题：ULTRACAM observations of SDSS J0926+3624: The first known eclipsing AM CVn star
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作者：C. Copperwheat ; T. Marsh ; S. Littlefair 等
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2010
卷号：2010
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The AM Canum Venaticorum (AM CVn) stars are ultracompact binaries with the lowest periods of any binary subclass, and consist of a white dwarf accreting material from a donor star that is itself fully or partially degenerate. These objects offer new insight into the formation and evolution of binary systems, and are predicted to be among the strongest gravitational wave sources in the sky. To date, the only known eclipsing source of this type is the 28 min binary SDSS 0926+3624. We discuss here multiband, high time resolution light curves of this system, collected with ULTRACAM in 2006 and 2009. From light curve models we make the most precise parameter determinations for any AM CVn and determine the degree of degeneracy of the donor star; a key parameter in differentiating between the proposed formation paths for these objects.