THE PAN-PACIFIC PLANET SEARCH. II. CONFIRMATION OF A TWO-PLANET SYSTEM AROUND HD 121056

被引：14
|
作者：
Wittenmyer, Robert A. [1 ,2 ]
Wang, Liang [3 ]
Liu, Fan [4 ]
Horner, Jonathan [2 ,5 ]
Endl, Michael [6 ]
Johnson, John Asher [7 ]
Tinney, C. G. [1 ,2 ]
Carter, B. D. [5 ]
机构：
[1] Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia
[2] Univ New S Wales, Australian Ctr Astrobiol, Sydney, NSW 2052, Australia
[3] Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China
[4] Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia
[5] Univ So Queensland, Computat Engn & Sci Res Ctr, Toowoomba, Qld 4350, Australia
[6] Univ Texas Austin, McDonald Observ, Austin, TX 78712 USA
[7] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
来源：
ASTROPHYSICAL JOURNAL | 2015年 / 800卷 / 01期
基金：
美国国家科学基金会; 澳大利亚研究理事会;
关键词：
planetary systems; stars: individual (HD 121056); techniques: radial velocities; ANGLO-AUSTRALIAN PLANET; RADIAL-VELOCITY MEASUREMENTS; GIANT PLANET; STELLAR EVOLUTION; JUPITER ANALOGS; SPACED DATA; BD+20 2457; K-GIANT; STARS; SUBGIANTS;
D O I：
10.1088/0004-637X/800/1/74
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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.
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页数：8
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