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Paper detail

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

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.

preprint2013arXivOpen access
K. BeuermannS. DreizlerF. V. HessmanU. BackhausA. BoeschT. -O. HusserL. NortmannA. SchmelevR. Springer
astro-ph.SR
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K. BeuermannS. DreizlerF. V. HessmanU. BackhausA. BoeschT. -O. HusserL. NortmannA. SchmelevR. Springer

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