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Orbital periods of cataclysmic variables identified by the SDSS. VII. Four new eclipsing systems
John Southworth, C. M. Copperwheat, B T Gansicke +1
We present photometry of nine cataclysmic variable stars identified by the Sloan Digital Sky Survey, aimed at measuring the orbital periods of these systems. Four of these objects…
Physical properties of IP Pegasi: an eclipsing dwarf nova with an unusually cool white dwarf
C. M. Copperwheat, T. R. Marsh, V. S. Dhillon +4
We present high speed photometric observations of the eclipsing dwarf nova IP Peg taken with the triple-beam camera ULTRACAM mounted on the William Herschel Telescope. The primary…
A survey for post common-envelope binary stars using GALEX and SDSS photometry
P. F. L. Maxted, B. T. Gaensicke, M. R. Burleigh +5
We report the first results of our programme to obtain multi-epoch radial velocity measurements of stars with a strong far-UV excess to identify post common-envelope binaries (PCEB…
Observations of three pre-cataclysmic variables from the Edinburgh-Cape Blue Object Survey
C. Tappert, B. T. Gaensicke, M. Zorotovic +4
We present light curves and time-resolved spectroscopy of the three candidate pre-cataclysmic binaries EC 12477-1738, EC 13349-3237, and EC 14329-1625. We determine the orbital per…
Chemical evolution of high-mass stars in close binaries. II. The evolved component of the eclipsing binary V380 Cygni
K. Pavlovski, E. Tamajo, P. Koubsky +3
The eclipsing and double-lined spectroscopic binary V380 Cyg is an extremely important probe of stellar evolution: its primary component is a high-mass star at the brink of leaving…
Post common envelope binaries from SDSS. IV: SDSSJ121258.25-012310.1, a new eclipsing system
A. Nebot Gómez-Morán, A. D. Schwope, M. R. Schreiber +8
From optical photometry we show that SDSSJ121258.25-012310.1 is a new eclipsing, post common-envelope binary with an orbital period of 8.06 hours and an eclipse length of 23 minute…