The eclipsing post-common envelope binary CSS21055: a white dwarf with a probable brown-dwarf companion

K. Beuermann; S. Dreizler; F. V. Hessman; U. Backhaus; A. Boesch; T. -O. Husser; L. Nortmann; A. Schmelev; R. Springer

doi:10.1051/0004-6361/201322241

The eclipsing post-common envelope binary CSS21055: a white dwarf with a probable brown-dwarf companion

Solar and Stellar Astrophysics 2013-12-19 v1

Authors: K. Beuermann , S. Dreizler , F. V. Hessman , U. Backhaus , A. Boesch , T. -O. Husser , L. Nortmann , A. Schmelev , R. Springer

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Abstract

We report photometric observations of the eclipsing close binary CSS21055 (SDSS J141126+200911) that strongly suggest that the companion to the carbon-oxygen white dwarf is a brown dwarf with a mass between 0.030 and 0.074 Msun. The measured orbital period is 121.73min and the totality of the eclipse lasts 125s. If confirmed, CSS21055 would be the first detached eclipsing WD+BD binary. Spectroscopy in the eclipse could provide information about the companion's evolutionary state and atmospheric structure.

Keywords

eclipsing binary stars cataclysmic variable orbital periods stellar and substellar companions

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@article{arxiv.1312.5088,
  title  = {The eclipsing post-common envelope binary CSS21055: a white dwarf with a probable brown-dwarf companion},
  author = {K. Beuermann and S. Dreizler and F. V. Hessman and U. Backhaus and A. Boesch and T. -O. Husser and L. Nortmann and A. Schmelev and R. Springer},
  journal= {arXiv preprint arXiv:1312.5088},
  year   = {2013}
}

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6 pages, 5 figures

The eclipsing post-common envelope binary CSS21055: a white dwarf with a probable brown-dwarf companion

Abstract

Keywords

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