2012A&A...540A...8B


Query : 2012A&A...540A...8B

2012A&A...540A...8B - Astronomy and Astrophysics, volume 540A, 8-8 (2012/4-1)

The quest for companions to post-common envelope binaries. II. NSVS 14256825 and HS 0705+6700.

BEUERMANN K., BREITENSTEIN P., DEBSKI B., DIESE J., DUBOVSKY P.A., DREIZLER S., HESSMAN F.V., HORNOCH K., HUSSER T.-O., POJMANSKI G., WOLF M., WOZNIAK P.R., ZASCHE P., DENK B., LANGER M., WAGNER C., WAHRENBERG D., BOLLMANN T., HABERMANN F.N., HAUSTOVICH N., LAUSER M., LIEBING F. and NIEDERSTADT F.

Abstract (from CDS):

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 variations in their measured orbital period, which can be explained by the action of a third object orbiting the binary. If this interpretation is correct, the third object in NSVS14256825 is a giant planet with a mass of roughly 12MJup. For HS0705+6700, we provide evidence that strengthens the case for the suggested periodic nature of the eclipse time variation and reduces the uncertainties in the parameters of the brown dwarf implied by that model. The derived period is 8.4yr and the mass is 31MJup, if the orbit is coplanar with the binary. This research is part of the PlanetFinders project, an ongoing collaboration between professional astronomers and student groups at high schools.

Abstract Copyright:

Journal keyword(s): binaries: close - binaries: eclipsing - subdwarfs - stars: individual: NSVS14256825 - stars: individual: HS0705+6700 - planets and satellites: detection

Simbad objects: 8

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Number of rows : 8
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 V* V470 Cam HS* 07 10 42.0513241680 +66 55 43.521505680           sdB+dM 109 1
2 V* DP Leo CV* 11 17 15.9239894616 +17 57 41.690453220           ~ 226 1
3 BD-07 3477 HS* 12 44 20.2386233232 -08 40 16.846099536   10.46 10.594 10.895   sdB2VIIHe3 282 1
4 V* UX UMa CV* 13 36 40.9531256400 +51 54 49.423353228   12.78 13.26     sdOB 522 0
5 V* QS Vir EB* 13 49 52.0029035208 -13 13 37.000132212 14.27 14.98 14.40 14.37   DA3+dM 134 1
6 V* NN Ser CV* 15 52 56.1203524080 +12 54 44.429312196     16.51     DAO1+M4 264 0
7 V* V1828 Aql HS* 20 20 00.4587151080 +04 37 56.517736296   12.9   13.34   sdOB+dM 68 1
8 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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2023.09.21-18:24:41

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