Beuermann, KlausKlausBeuermannDreizler, StefanStefanDreizlerHessman, Frederic V.Frederic V.HessmanBackhaus, U.U.BackhausBoesch, A.A.BoeschHusser, Tim-OliverTim-OliverHusserNortmann, L.L.NortmannSchmelev, A.A.SchmelevSpringer, R.R.Springer2018-11-072018-11-072013https://resolver.sub.uni-goettingen.de/purl?gro-2/28520We 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-circle dot. 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.journal_article10.1051/0004-6361/201322241000326574000096https://resolver.sub.uni-goettingen.de/purl?gs-1/10879