publication . Article . 2009

Post common envelope binaries from SDSS. IV, SDSS J121258.25–012310.1, a new eclipsing system \ud

Gomez-Moran, A. Nebot; Schwope, A. D. (Axel D.); Schreiber, Matthias R.; Gaensicke, B. T. (Boris T.); Pyrzas, S.; Schwarz, R. (Robert); Southworth, J. (John); Kohnert, J.; Vogel, J.; Krumpe, M.; ...
Open Access English
  • Published: 01 Feb 2009
  • Publisher: EDP Sciences
  • Country: United Kingdom
Abstract
From optical photometry we show that SDSS J121258.25–012310.1 is a new eclipsing, post common-envelope binary with an orbital period of 8.06 h and an eclipse length of 23 min. We observed the object over 11 nights in different bands and determined the ephemeris of the eclipse to HJDmid = 2 454 104.7086(2) + 0.3358706(5) × E, where numbers in parenthesis indicate the uncertainties in the last digit. The depth of the eclipse is 2.85 ± 0.17 mag in the V band, 1.82 ± 0.08 mag in the R band and 0.52 ± 0.02 mag in the\ud I band. From spectroscopic observations we measured the semi-amplitude of the radial velocity K2 = 181±3 kms−1 for the secondary star. The stellar an...
Subjects
free text keywords: QB
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