2012A&A...538A..84B

Query : 2012A&A...538A..84B

2012A&A...538A..84B - Astronomy and Astrophysics, volume 538A, 84-84 (2012/2-1)

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

BACKHAUS U., BAUER S., BEUERMANN K., DIESE J., DREIZLER S., HESSMAN F.V., HUSSER T.-O., KLAPDOHR K.-H., MOELLMANNS J., SCHUENECKE R., DETTE J., DUBBERT J., MIOSGA T., ROCHUS VOGEL A.L., SIMONS S., BIRIUK S., DEBRAH M., GRIEMENS M., HAHN A., MOELLER T., PAWLOWSKI M., SCHWEIZER M., SPECK A.-L., ZAPROS C., BOLLMANN T., HABERMANN F.N., HAUSTOVICH N., LAUSER M., LIEBING F., NIEDERSTADT F., HOPPEN K., KINDERMANN D., KUEPPERS F., RAUCH B., ALTHOFF F., HORSTMANN M., KELLERMAN J.N., KIETZ R., NIENABER T., SAUER M., SECCI A. and WUELLNER L.

Abstract (from CDS):

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.

Abstract Copyright: ∼

Journal keyword(s): binaries: close - binaries: eclipsing - planets and satellites: detection

CDS comments: in ref list Qian et al. 2009, ApJ, 695, L1631 is a misprint for Qian et al. 2009, ApJ, 695, L163.

Simbad objects: 19

Full paper

View the references in ADS

Number of rows : 19

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2024	#notes
1	US 3566	WD*	03 03 08.3621593176	+00 54 43.921390896	18.9	18.06	18.1	16.00	DC+M4.5e	40	0
2	V* V470 Cam	HS*	07 10 42.0513241680	+66 55 43.521505680					sdB+dM	110	1
3	SDSS J083845.86+191416.5	WD*	08 38 45.8652727872	+19 14 16.782202932					DA+M	19	0
4	GALEX J085746.2+034255	WD*	08 57 46.1848948032	+03 42 55.352826180					DA+M	29	0
5	GALEX J090812.1+060420	WD*	09 08 12.0406036752	+06 04 21.232540416		17.15			DA+M	27	0
6	GALEX J093948.0+325808	WD*	09 39 47.9713906824	+32 58 07.321743084					DA+M	18	0
7	SDSS J095719.24+234240.7	WD*	09 57 19.2481173360	+23 42 40.769159184					DA+M	16	0
8	GALEX J100559.1+224932	WD*	10 05 59.1154061304	+22 49 32.311886664					DA+DA	47	0
9	V* DP Leo	CV*	11 17 15.9239894616	+17 57 41.690453220					~	227	1
10	BD-07 3477	HS*	12 44 20.2386233232	-08 40 16.846099536	10.46	10.594	10.895		sdB2VIIHe3	284	1
11	PSR B1257+12	Psr	13 00 03.1075	+12 40 55.155					~	513	1
12	SDSS J132518.18+233808.0	WD?	13 25 18.1820851920	+23 38 08.025925020					~	6	0
13	GALEX J132925.2+123025	WD*	13 29 25.2310236312	+12 30 25.483122324					DA+M	20	0
14	LP 618-14	WD*	13 36 16.0374162449	+00 17 32.551214112	17.4		16.9		DA+dM	19	0
15	FBS 1531+381	HS*	15 33 49.4441301600	+37 59 28.095378720		13.08			sdB+dM	43	0
16	GALEX J154846.0+405728	WD*	15 48 46.0071409320	+40 57 28.797200712					DA+M6	33	0
17	V* NN Ser	CV*	15 52 56.1203524080	+12 54 44.429312196		16.51			DAO1+M4	269	0
18	PSR B1620-26	Psr	16 23 38.2218	-26 31 53.769		21.30			~	294	2
19	V* HU Aqr	CV*	21 07 58.1944529400	-05 17 40.557671916	16.198	15.814	14.891		D+M4V	273	1

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