The Anglo-Australian planet search. XXII. Two new multi-planet systems

Wittenmyer, Robert A. and Horner, J. and Tuomi, Mikko and Salter, G. S. and Tinney, C. G. and Butler, R. P. and Jones, H. R. A. and O'Toole, S. J. and Bailey, J. and Carter, B. D. and Jenkins, J. S. and Zhang, Z. and Vogt, S. S. and Rivera, Eugenio J. (2012) The Anglo-Australian planet search. XXII. Two new multi-planet systems. Astrophysical Journal, 753 (2). pp. 1-12. ISSN 0004-637X

Abstract

We report the detection of two new planets from the Anglo-Australian Planet Search. These planets orbit two stars each previously known to host one planet. The new planet orbiting HD 142 has a period of 6005 ± 427 days, and a minimum mass of 5.3 M Jup. HD 142c is thus a new Jupiter analog: a gas-giant planet with a long period and low eccentricity (e = 0.21 ± 0.07). The second planet in the HD 159868 system has a period of 352.3 ± 1.3 days and m sin i = 0.73 ± 0.05 M Jup. In both of these systems, including the additional planets in the fitting process significantly reduced the eccentricity of the original planet. These systems are thus examples of how multiple-planet systems can masquerade as moderately eccentric single-planet systems


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to published version, due to publisher's copyright policy (IOP)
Depositing User: epEditor USQ
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 05 Dec 2012 20:52
Last Modified: 03 Jul 2013 01:32
Uncontrolled Keywords: planetary systems; stars: individual (HD 142, HD 159868); techniques; radial velocities
Fields of Research (FOR2008): 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 > 020102 Astronomical and Space Instrumentation
Socio-Economic Objective (SEO2008): E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: doi: 10.1088/0004-637X/753/2/169
URI: http://eprints.usq.edu.au/id/eprint/22201

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