4 papers
The quest for companions to post-common envelope binaries. II. NSVS14256825 and HS0705+6700
K. Beuermann, P. Breitenstein, B. Debski +20
We report new mid-eclipse times of the two close binaries NSVS14256825 and HS0705+6700, harboring an sdB primary and a low-mass main-sequence secondary. Both objects display clear…
The quest for companions to post-common envelope binaries: I. Searching a sample of stars from the CSS and SDSS
U. Backhaus, S. Bauer, K. Beuermann +39
As part of an ongoing collaboration between student groups at high schools and professional astronomers, we have searched for the presence of circum-binary planets in a bona-fide u…
The giant planet orbiting the cataclysmic binary DP Leonis
K. Beuermann, J. Buhlmann, J. Diese +13
Planets orbiting post-common envelope binaries provide fundamental information on planet formation and evolution, especially for the yet nearly unexplored class of circumbinary pla…
A long-term optical and X-ray ephemeris of the polar EK Ursae Majoris
K. Beuermann, J. Diese, S. Paik +4
We searched for long-term period changes in the polar EK UMa using new optical data and archival X-ray/EUV data. An optical ephemeris was derived from data taken remotely with the…