Main-sequence progenitor configurations of the NN ser candidate circumbinary planetary system are dynamically unstable

Mustill, Alexander J. and Marshall, Jonathan P. and Villaver, Eva and Veras, Dimitri and Davis, Philip J. and Horner, Jonathan and Wittenmyer, Robert A. (2013) Main-sequence progenitor configurations of the NN ser candidate circumbinary planetary system are dynamically unstable. Monthly Notices of the Royal Astronomical Society, 436 (3). pp. 2515-2521. ISSN 0035-8711

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Abstract

Recent observations of the NN Serpentis post-common envelope binary system have revealed eclipse timing variations that have been attributed to the presence of two Jovian-mass exo-planets. Under the assumption that these planets are real and survived from the binary's main-sequence state, we reconstruct initial binaries that give rise to the present NN Ser configuration and test the dynamical stability of the original system. Under standard assumptions about binary evolution, we find that survival of the planets through the entire main-sequence lifetime is very unlikely. Hence, we conclude that the planets are not survivors from before the common envelope phase, implying that either they formed recently out of material ejected from the primary or that the observed signals are of non-planetary origin.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2013 The Authors. Published version deposited in accordance with the copyright policy of the publisher.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - No Department
Date Deposited: 25 Jun 2014 23:35
Last Modified: 23 Mar 2017 00:24
Uncontrolled Keywords: planets and satellites; dynamical evolution and stability; binaries; stars; NN Ser; planetary systems
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)
02 Physical Sciences > 0201 Astronomical and Space Sciences > 020101 Astrobiology
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: 10.1093/mnras/stt1754
URI: http://eprints.usq.edu.au/id/eprint/25360

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