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.

引用

页数：8

共 25 条

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