SIMBAD references

2013ApJ...766...11A - Astrophys. J., 766, 11 (2013/March-3)

Two possible circumbinary planets in the eclipsing post-common envelope system NSVS 14256825.


Abstract (from CDS):

We present an analysis of eclipse timings of the post-common envelope binary NSVS 14256825, which is composed of an sdOB star and a dM star in a close orbit (Porb= 0.110374 days). High-speed photometry of this system was performed between 2010 July and 2012 August. Ten new mid-eclipse times were analyzed together with all available eclipse times in the literature. We revisited the (O - C) diagram using a linear ephemeris and verified a clear orbital period variation. On the assumption that these orbital period variations are caused by light travel time effects, the (O - C) diagram can be explained by the presence of two circumbinary bodies, even though this explanation requires a longer baseline of observations to be fully tested. The orbital periods of the best solution would be Pc∼ 3.5 years and Pd ∼ 6.9 years. The corresponding projected semi-major axes would be acsin ic∼ 1.9 AU and ad sin id∼ 2.9 AU. The masses of the external bodies would be Mc∼ 2.9 MJupiter and Md∼ 8.1 MJupiter, if we assume their orbits are coplanar with the close binary. Therefore NSVS 14256825 might be composed of a close binary with two circumbinary planets, though the orbital period variations is still open to other interpretations.

Abstract Copyright:

Journal keyword(s): binaries: close - binaries: eclipsing - planetary systems - stars: individual: NSVS 14256825 - subdwarfs

Simbad objects: 14

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