A second giant planet in 3:2 mean-motion resonance in the HD 204313 system

Robertson, Paul and Horner, J. and Wittenmyer, Robert A. and Endl, Michael and Cochran, William D. and MacQueen, Phillip J. and Brugamyer, Erik J. and Simon, Attila E. and Barnes, Stuart I. and Caldwell, Caroline (2012) A second giant planet in 3:2 mean-motion resonance in the HD 204313 system. The Astrophysical Journal, 754 (1). pp. 1-9. ISSN 0004-637X

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We present eight years of high-precision radial velocity (RV) data for HD 204313 from the 2.7m Harlan J. Smith Telescope at McDonald Observatory. The star is known to have a giant planet (Msin i = 3.5 M J ) on a 1900 day orbit, and a Neptune-mass planet at 0.2AU. Using our own data in combination with the published CORALIE RVs of Segransan et al., we discover an outer Jovian (Msin i = 1.6 M J ) planet with P 2800 days. Our orbital fit suggests that the planets are in a 3:2 mean motion resonance, which would potentially affect their stability. We perform a detailed stability analysis and verify that the planets must be in resonance.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version made accessible, in accordance with the copyright policy of the publisher.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Date Deposited: 26 Jun 2014 04:03
Last Modified: 17 Aug 2017 05:18
Uncontrolled Keywords: planetary systems; planets and satellites; dynamical evolution and stability; HD 204313; 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)
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: 10.1088/0004-637X/754/1/50
URI: http://eprints.usq.edu.au/id/eprint/25366

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