The eclipsing post-common envelope binary CSS21055: a white dwarf with a probable brown-dwarf companion
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 M⊙. The measured orbital period is 121.73 min and the totality of the eclipse lasts 125 s. 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.
Light curves are only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/558/A96- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- October 2013
- DOI:
- 10.1051/0004-6361/201322241
- arXiv:
- arXiv:1312.5088
- Bibcode:
- 2013A&A...558A..96B
- Keywords:
-
- binaries: close;
- binaries: eclipsing;
- white dwarfs;
- brown dwarfs;
- stars: individual: CSS21055;
- stars: individual: SDSS J141126+200911;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 6 pages, 5 figures
