A detailed investigation of the proposed NN Serpentis planetary system

Horner, J. and Wittenmyer, R. A. and Hinse, T. C. and Tinney, C. G. (2012) A detailed investigation of the proposed NN Serpentis planetary system. Monthly Notices of the Royal Astronomical Society, 425 (1). pp. 749-756. ISSN 0035-8711

[img]
Preview
Text (Published Version)
Horner_Wittenmyer_Hinse_Tinney_MNRAS_v425n1_PV.pdf

Download (1057Kb) | Preview

Abstract

The post-main-sequence eclipsing binary NN Serpentis was recently announced as the potential host of at least two massive planetary companions. In that work, the authors put forward two potential architectures that fit the observations of the eclipsing binary with almost identical precision. In this work, we present the results of a dynamical investigation of the orbital stability of both proposed system architectures, finding that they are only stable for scenarios in which the planets are locked in mutual mean motion resonance. In the discovery work, the authors artificially fixed the orbital eccentricity of the more massive planet, NN Ser (AB) c, at 0. Here, we reanalyse the observational data on NN Serpentis without this artificial constraint, and derive a new orbital solution for the two proposed planets. We detail the results of further dynamical simulations investigating the stability of our new orbital solution, and find that allowing a small non-zero eccentricity for the outer planet renders the system unstable. We conclude that although the original orbits proposed for the NN Serpentis planetary system prove dynamically feasible, further observations of the system are vital in order to better constrain the system's true architecture.


Statistics for USQ ePrint 25367
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2012 Royal Astronomical Society. This publication is copyright. It may be reproduced in whole or in part for the purposes of study, research, or review, but is subject to the inclusion of an acknowledgment of the source. Revision of paper presented at: 11th Australian Space Science Conference, 2011.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Date Deposited: 26 Jun 2014 02:22
Last Modified: 22 Mar 2017 01:44
Uncontrolled Keywords: binaries; eclipsing; planetary systems; planets and satellites; dynamical evolution and stability; NN Ser
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: 10.1111/j.1365-2966.2012.21620.x
URI: http://eprints.usq.edu.au/id/eprint/25367

Actions (login required)

View Item Archive Repository Staff Only