On the dynamical stability of the proposed planetary system orbiting NSVS 14256825

Wittenmyer, Robert A. and Horner, J. and Marshall, J. P. (2013) On the dynamical stability of the proposed planetary system orbiting NSVS 14256825. Monthly Notices of the Royal Astronomical Society, 431 (3). pp. 2150-2154. ISSN 0035-8711

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We present a detailed dynamical analysis of the orbital stability of the two circumbinary planets recently proposed to orbit the evolved eclipsing binary star system NSVS 14256825. As is the case for other recently proposed circumbinary planetary systems detected through the timing of mutual eclipses between the central binary stars, the proposed planets do not stand up to dynamical scrutiny. The proposed orbits for the two planets are extremely unstable on time-scales of less than a thousand years, regardless of the mutual inclination between the planetary orbits. For the scenario where the planetary orbits are coplanar, a small region of moderate stability was observed, featuring orbits that were somewhat protected from destabilization by the influence of mutual 2:1 mean-motion resonance between the orbits of the planets. Even in this stable region, however, the systems tested typically only survived on time-scales of the order of 1 Myr, far shorter than the age of the system. Our results suggest that if there are planets in the NSVS 14256825 system, they must move on orbits dramatically different to those proposed in the discovery work. More observations are clearly critically required in order to constrain the nature of the suggested orbital bodies.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2013 The Authors.
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 26 Jun 2014 00:19
Last Modified: 27 Mar 2017 00:11
Uncontrolled Keywords: binaries; eclipsing; planetary systems; planets and satellites; dynamical evolution and stability; stars; NSVS 14256825
Fields of Research : 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
02 Physical Sciences > 0201 Astronomical and Space Sciences > 020108 Planetary Science (excl. Extraterrestrial Geology)
01 Mathematical Sciences > 0102 Applied Mathematics > 010204 Dynamical Systems in Applications
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: 10.1093/mnras/stt299
URI: http://eprints.usq.edu.au/id/eprint/25362

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