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A Search for Exoplanets around Northern Circumpolar Stars. IV. Six Planet Candidates to the K Giants, HD 44385, HD 97619, HD 106574, HD 118904, HD 164428, and HD 202432
Jeong, Gwanghui1,2; Han, Inwoo1,2; Park, Myeong-Gu3; Hatzes, Artie P.4; Bang, Tae-Yang3; Gu SH(顾盛宏)5,6,7; Bai JM(白金明)5,7; Lee, Byeong-Cheol1,2
发表期刊ASTRONOMICAL JOURNAL
2018-08-01
卷号156期号:2
DOI10.3847/1538-3881/aacbc1
产权排序第5完成单位
收录类别SCI
关键词Planetary Systems Stars: Late-type Techniques: Radial Velocities
摘要

We report the discovery of long-period radial velocity (RV) variations in six intermediate-mass K-giant stars using precise RV measurements. These discoveries are part of the Search for Exoplanets around Northern Circumpolar Stars (SENS) survey being conducted at the Bohyunsan Optical Astronomy Observatory. The nature of the RV variations was investigated by looking for photometric and line shape variations. We can find no variability with the RV period in these quantities and conclude that RV variations are most likely due to unseen sub-stellar companions. Orbital solutions for the six stars yield orbital periods in the range 418-1065 days and minimum masses in the range 1.9-8.5 M-J. These properties are typical on planets around intermediate-mass stars. Our SENS survey so far has about an 8% confirmed planet occurrence rate, and it will provide better statistics on planets around giant stars when the survey is completed.

项目资助者KASI (Korea Astronomy and Space Science Institute)(2017-1-860-01) ; KASI(2017-1-830-03) ; KASI under the R&D program supervised by the Ministry of Science, ICT and Future Planning ; National Research Foundation of Korea to the Center for Galaxy Evolution Research(2017R1A5A1070354) ; BK21 Plus of National Research Foundation of Korea ; NSFC(U1531121) ; BOAO
语种英语
学科领域天文学
学科门类理学 ; 理学::天文学
文章类型Article
出版者IOP PUBLISHING LTD
ISSN0004-6256
URL查看原文
WOS记录号WOS:000439880400006
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]Radial-velocity Variability ; Fundamental Parameters ; Infrared Excesses ; Spaced Data ; Stellar ; Isochrones ; Companion ; Dwarfs ; Tracks ; Boes
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/17381
专题系外行星研究组
中国科学院天体结构与演化重点实验室
通讯作者Jeong, Gwanghui; Lee, Byeong-Cheol
作者单位1.Korea Astronomy and Space Science Institute, 776, Daedeokdae-Ro, Youseong-Gu, Daejeon 34055, Republic of Korea
2.Korea University of Science and Technology, 217, Gajeong-ro Yuseong-gu, Daejeon 34113, Republic of Korea
3.Department of Astronomy and Atmospheric Sciences, Kyungpook National University, Daegu 41566, Republic of Korea
4.Thüringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenburg, Germany
5.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People's Republic of China
6.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
7.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, People's Republic of China
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GB/T 7714
Jeong, Gwanghui,Han, Inwoo,Park, Myeong-Gu,et al. A Search for Exoplanets around Northern Circumpolar Stars. IV. Six Planet Candidates to the K Giants, HD 44385, HD 97619, HD 106574, HD 118904, HD 164428, and HD 202432[J]. ASTRONOMICAL JOURNAL,2018,156(2).
APA Jeong, Gwanghui.,Han, Inwoo.,Park, Myeong-Gu.,Hatzes, Artie P..,Bang, Tae-Yang.,...&Lee, Byeong-Cheol.(2018).A Search for Exoplanets around Northern Circumpolar Stars. IV. Six Planet Candidates to the K Giants, HD 44385, HD 97619, HD 106574, HD 118904, HD 164428, and HD 202432.ASTRONOMICAL JOURNAL,156(2).
MLA Jeong, Gwanghui,et al."A Search for Exoplanets around Northern Circumpolar Stars. IV. Six Planet Candidates to the K Giants, HD 44385, HD 97619, HD 106574, HD 118904, HD 164428, and HD 202432".ASTRONOMICAL JOURNAL 156.2(2018).
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