The Pan-Pacific planet search. II. Confirmation of a two-planet system around HD 121056

Wittenmyer, Robert A. and Wang, Liang and Liu, Fan and Horner, Jonathan and Endl, Michael and Johnson, John Asher and Tinney, C. G. and Carter, B. D. (2015) The Pan-Pacific planet search. II. Confirmation of a two-planet system around HD 121056. The Astrophysical Journal, 800 (74). pp. 1-8. ISSN 0004-637X

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Precise radial velocities from the Anglo-Australian Telescope confirm the presence of a rare short-period planet around the K0 giant HD 121056. An independent two-planet solution using the AAT data shows that the inner planet has P=89.1+/-0.1 days, and m sin i=1.35+/-0.17 Mjup. These data also confirm the planetary nature of the outer companion, with m sin i=3.9+/-0.6 Mjup and a=2.96+/-0.16 AU. HD 121056 is the most-evolved star to host a confirmed multiple-planet system, and is a valuable example of a giant star hosting both a short-period and a long-period planet.

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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: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 19 Feb 2015 09:56
Last Modified: 06 Mar 2018 05:03
Uncontrolled Keywords: astrophysics; earth and planetary astrophysics
Fields of Research : 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: 10.1088/0004-637X/800/1/74

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