A detailed analysis of the HD 73526 2:1 resonant planetary system

Wittenmyer, Robert A. and Tan, Xianyu and Lee, Manhoi and Horner, Jonathan and Tinney, C. G. and Butler, R. P. and Salter, G. S. and Carter, B. D. and Jones, H. R. A. and O'Toole, S. J. and Bailey, J. and Wright, D. and Crane, J. D. and Schectman, S. A. and Arriagada, P. and Thompson, I. and Minniti, D. and Diaz, M. (2014) A detailed analysis of the HD 73526 2:1 resonant planetary system. The Astrophysical Journal, 780 (2). pp. 1-9. ISSN 0004-637X

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We present six years of new radial velocity data from the Anglo-Australian and Magellan Telescopes on the HD 73526 2:1 resonant planetary system. We investigate both Keplerian and dynamical (interacting) fits to these data, yielding four possible configurations for the system. The new data now show that both resonance angles are librating, with amplitudes of 40° and 60°, respectively. We then perform long-term dynamical stability tests to differentiate these solutions, which only differ significantly in the masses of the planets. We show that while there is no clearly preferred system inclination, the dynamical fit with i = 90°provides the best combination of goodness-of-fit and long-term dynamical stability.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2014 The American 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.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - No Department
Date Deposited: 22 Jul 2014 05:14
Last Modified: 22 Sep 2016 05:28
Uncontrolled Keywords: numerical methods; planets and satellites; dynamical evolution and stability; planets and satellites; HD 73526; radial velocities
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: 10.1088/0004-637X/780/2/140
URI: http://eprints.usq.edu.au/id/eprint/25593

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