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Post Common Envelope Binaries from SDSS. V: Four eclipsing white dwarf main sequence binaries
S. Pyrzas, B. T. Gänsicke, T. R. Marsh +7
We identify SDSS011009.09+132616.1, SDSS030308.35+005444.1, SDSS143547.87+373338.5 and SDSS154846.00+405728.8 as four eclipsing white dwarf plus main sequence (WDMS) binaries from…
ULTRACAM observations of two accreting white dwarf pulsators
C. M. Copperwheat, T. R. Marsh, V. S. Dhillon +6
In this paper we present high time-resolution observations of GW Librae and SDSS J161033.64-010223.3 -- two cataclysmic variables which have shown periodic variations attributed to…
Post Common Envelope Binaries from SDSS - III. Seven new orbital periods
A. Rebassa-Mansergas, B. T. Gaensicke, M. R. Schreiber +11
We present follow-up spectroscopy and photometry of 11 post common envelope binary (PCEB) candidates identified from multiple Sloan Digital Sky Survey (SDSS) spectroscopy in an ear…
Post common envelope binaries from SDSS. II: Identification of 9 close binaries with VLT/FORS2
M. R. Schreiber, B. T. Gaensicke, J. Southworth +2
The Sloan Digital Sky Survey turned out to be very efficient in identifying white dwarf/main sequence binaries (WDMS). The population of WDMS systems consists of wide systems whose…
SDSSJ104341.53+085558.2: A second white dwarf with a gaseous debris disc
B. T. Gaensicke, T. R. Marsh, J. Southworth
Intermediate resolution spectroscopy of the white dwarf SDSSJ104341.53+085558.2 contains double-peaked emission lines of CaII8498,8542,8662 and identifies this object to be the sec…
Abundances from disentangled component spectra of close binary stars: An observational test of an earlz mixing in high-mass stars
K. Pavlovski, D. E. Holmgren, P. Koubsky +2
Recent theoretical calculations of stellar evolutionary tracks for rotating high-mass stars suggests that the chemical composition of the surface layers changes even whilst the sta…