THE CALIFORNIA PLANET SURVEY IV: A PLANET ORBITING THE GIANT STAR HD 145934 AND UPDATES TO SEVEN SYSTEMS WITH LONG-PERIOD PLANETS

被引：31

作者：

Feng, Y. Katherina ^{[1
,4
]}

Wright, Jason T. ^{[1
]}

Nelson, Benjamin ^{[1
]}

Wang, Sharon X. ^{[1
]}

Ford, Eric B. ^{[1
]}

Marcy, Geoffrey W. ^{[2
]}

Isaacson, Howard ^{[2
]}

Howard, Andrew W. ^{[3
]}

机构：

[1] Penn State Univ, Dept Astron & Astrophys, Ctr Exoplanets & Habitable Worlds, University Pk, PA 16802 USA

[2] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

[3] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA

[4] Univ Calif Santa Cruz, Dept Astron & Astrophys, MS UCO LICK, Santa Cruz, CA 95064 USA

来源：

ASTROPHYSICAL JOURNAL | 2015年 / 800卷 / 01期

基金：

美国国家科学基金会;

关键词：

planetary systems; stars:; individual; (HD; 145934; GJ; 849); techniques: radial velocities; EXTRA-SOLAR PLANETS; RADIAL-VELOCITY; CORALIE SURVEY; COOL STARS; SEARCH; COMPANIONS; DWARF; MASS; JUPITER; LICK;

D O I：

10.1088/0004-637X/800/1/22

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present an update to seven stars with long-period planets or planetary candidates using new and archival radial velocities from Keck-HIRES and literature velocities from other telescopes. Our updated analysis better constrains orbital parameters for these planets, four of which are known multi-planet systems. HD 24040 b and HD 183263 c are super-Jupiters with circular orbits and periods longer than 8 yr. We present a previously unseen linear trend in the residuals of HD 66428 indicative of an additional planetary companion. We confirm that GJ 849 is a multi-planet system and find a good orbital solution for the c component: it is a 1 M-Jup planet in a 15 yr orbit (the longest known for a planet orbiting an M dwarf). We update the HD 74156 double-planet system. We also announce the detection of HD 145934 b, a 2 M-Jup planet in a 7.5 yr orbit around a giant star. Two of our stars, HD 187123 and HD 217107, at present host the only known examples of systems comprising a hot Jupiter and a planet with a well constrained period greater than 5 yr, and with no evidence of giant planets in between. Our enlargement and improvement of long-period planet parameters will aid future analysis of origins, diversity, and evolution of planetary systems.

引用

页数：14

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