The quest for companions to post-common envelope binaries I. Searching a sample of stars from the CSS and SDSS

被引:18
作者
Backhaus, U. [1 ]
Bauer, S. [2 ]
Beuermann, K. [3 ]
Diese, J. [4 ]
Dreizler, S. [3 ]
Hessman, F. V. [3 ]
Husser, T. -O. [3 ]
Klapdohr, K. -H. [2 ]
Moellmanns, J. [5 ]
Schuenecke, R. [6 ]
Dette, J. [2 ]
Dubbert, J. [2 ]
Miosga, T. [2 ]
Vogel, A. L. Rochus [2 ]
Simons, S. [2 ]
Biriuk, S. [2 ]
Debrah, M. [2 ]
Griemens, M. [2 ]
Hahn, A. [2 ]
Moeller, T. [2 ]
Pawlowski, M. [2 ]
Schweizer, M. [2 ]
Speck, A. -L. [2 ]
Zapros, C. [2 ]
Bollmann, T. [4 ]
Habermann, F. N. [4 ]
Haustovich, N. [4 ]
Lauser, M. [4 ]
Liebing, F. [4 ]
Niederstadt, F. [4 ]
Hoppen, K. [5 ]
Kindermann, D. [5 ]
Kueppers, F. [5 ]
Rauch, B. [5 ]
Althoff, F. [6 ]
Horstmann, M. [6 ]
Kellerman, J. N. [6 ]
Kietz, R. [6 ]
Nienaber, T. [6 ]
Sauer, M. [6 ]
Secci, A. [6 ]
Wuellner, L. [6 ]
机构
[1] Univ Duisburg Essen, D-45117 Essen, Germany
[2] Leibniz Gymnasium, D-45326 Essen, Germany
[3] Univ Gottingen, Inst Astrophys, D-37077 Gottingen, Germany
[4] Max Planck Gymnasium, D-37073 Gottingen, Germany
[5] Don Bosco Gymnasium, Essen, Germany
[6] Evangel Gymnasium, D-59555 Lippstadt, Germany
来源
ASTRONOMY & ASTROPHYSICS | 2012年 / 538卷
关键词
binaries: close; binaries: eclipsing; planets and satellites: detection; PLANETARY SYSTEM; NN SERPENTIS;
D O I
10.1051/0004-6361/201118104
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
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 unbiased sample of twelve post-common envelope binaries (PCEBs) from the Catalina Sky Survey (CSS) and the Sloan Digital Sky Survey (SDSS). Although the present ephemerides are significantly more accurate than previous ones, we find no clear evidence for orbital period variations between 2005 and 2011 or during the 2011 observing season. The sparse long-term coverage still permits O-C variations with a period of years and an amplitude of tens of seconds, as found in other systems. Our observations provide the basis for future inferences about the frequency with which planet-sized or brown-dwarf companions have either formed in these evolved systems or survived the common envelope (CE) phase.
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页数:5
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