The pan-pacific planet search. II. Confirmation of a two-planet system around HD 121056

Robert A. Wittenmyer; Liang Wang; Fan Liu; Jonathan Horner; Michael Endl; John Asher Johnson; C. G. Tinney; B. D. Carter

doi:10.1088/0004-637X/800/1/74

The pan-pacific planet search. II. Confirmation of a two-planet system around HD 121056

Robert A. Wittenmyer, Liang Wang, Fan Liu, Jonathan Horner, Michael Endl, John Asher Johnson, C. G. Tinney, B. D. Carter

Research output: Contribution to journal › Article › Research › peer-review

16 Citations (Scopus)

Abstract

Precise radial velocities from the Anglo-Australian Telescope (AAT) 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 M_Jup. These data also confirm the planetary nature of the outer companion, with m sin i = 3.9 ± 0.6 M_Jup 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.

Original language	English
Article number	74
Number of pages	8
Journal	The Astrophysical Journal
Volume	800
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/800/1/74
Publication status	Published - 10 Feb 2015
Externally published	Yes

Keywords

Planetary systems
Stars: individual (HD 121056)
Techniques: radial velocities

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10.1088/0004-637X/800/1/74Licence: CC BY

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AU - Liu, Fan

AU - Horner, Jonathan

AU - Endl, Michael

AU - Johnson, John Asher

AU - Tinney, C. G.

AU - Carter, B. D.

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The pan-pacific planet search. II. Confirmation of a two-planet system around HD 121056

Abstract

Keywords

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