2013/09/23 by K. Beuermann, S. Dreizler, F. V. Hessman +9 · 1 citation
Mathematics · Physics and Astronomy · #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Astrophysics and Star Formation Studies #Binary number #Biology #Blue dwarf #Brown dwarf #Common envelope #Eclipse #Genetics #Mathematics #Orbital period #Physics #Stars #Stellar, planetary, and galactic studies #White (mutation) #White dwarf #astro-ph.SR
paper · pdf · doi:10.1051/0004-6361/201322241
published as Astronomy & Astrophysics 10/2013, Volume 558, id.A96, 6 pp · 6 pages, 5 figures
openalex publication_date 2013/09/23 · arxiv created 2013/12/18 · arxiv updated 2013/12/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.