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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
Source PublicationASTRONOMICAL JOURNAL
2018-08-01
Volume156Issue:2
DOI10.3847/1538-3881/aacbc1
Contribution Rank第5完成单位
Indexed BySCI
KeywordPlanetary Systems Stars: Late-type Techniques: Radial Velocities
Abstract

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.

Funding ProjectKASI (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
Funding OrganizationKASI (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
Language英语
Subject Area天文学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-6256
URL查看原文
WOS IDWOS:000439880400006
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordRadial-velocity Variability ; Fundamental Parameters ; Infrared Excesses ; Spaced Data ; Stellar ; Isochrones ; Companion ; Dwarfs ; Tracks ; Boes
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/17381
Collection系外行星研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorJeong, Gwanghui; Lee, Byeong-Cheol
Affiliation1.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
Recommended Citation
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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