A long-period eccentric substellar companion to the evolved intermediate-mass star HD 14067

Publications of the Astronomical Society of Japan

Wu, Xiaoshu³  Takeda, Yoichi⁶  Liu, Yujuan⁹  Kambe, Eiji²  Izumiura, Hideyuki⁸  Song, Nan³  Ando, Hiroyasu⁴  Ida, Shigeru¹  Kokubo, Eiichiro⁴  Harakawa, Hiroki¹  Wang, Liang⁹  He, Wei³  Yoshida, Michitoshi⁷  Zhao, Gang⁹  Omiya, Masashi¹  Sato, Bun'ei¹  Itoh, Yoichi⁵ 

[1] Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan;Okayama Astrophysical Observatory, National Astronomical Observatory of Japan, Kamogata-cho, Asakuchi, Okayama 719-0232, Japan;Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, 20, Datun Road, Chaoyang District, Beijing 100012, ChinaUniversity of Chinese Academy of Sciences, 19A Yuquan Road, Shijingshan District, 100049 Beijing, China;National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan;Nishi-Harima Astronomical Observatory, Center for Astronomy, University of Hyogo, 407-2 Nishigaichi, Sayo, Hyogo 679-5313, Japan;The Graduate University for Advanced Studies, Shonan Village, Hayama, Kanagawa 240-0193, JapanNational Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan;Hiroshima Astrophysical Science Center, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan;Okayama Astrophysical Observatory, National Astronomical Observatory of Japan, Kamogata-cho, Asakuchi, Okayama 719-0232, JapanThe Graduate University for Advanced Studies, Shonan Village, Hayama, Kanagawa 240-0193, Japan;Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, 20, Datun Road, Chaoyang District, Beijing 100012, China

关键词: "planetary systems";    "stars: individual (HD 14067)";    "techniques: radial velocities";   

DOI  :  10.1093/pasj/psu113

学科分类：天文学(综合)

来源: Oxford University Press

【 摘 要 】

Wereportonthedetectionofasubstellarcompanionorbitinganevolvedintermediate-mass(M⋆ = 2.4 M⊙)starHD 14067(G9 III)usingapreciseDopplertechnique.EitheraperiodicKeplerianvariationwithadecreasinglinearvelocitytrend(P = 1455 d,K1 = 92.2 m s−1,e = 0.533,and$$dot{gamma}=-22.4:$$m s−1 yr−1)orasingleKeplerianorbitwithoutlineartrend(P = 2850 d,K1 = 100.1 m s−1,ande = 0.697)canbewellfittedtotheradialvelocitiesofthisstar.Theminimummass(m2 sin i = 7.8 MJforthemodelwithalineartrend,orm2 sin i = 9.0 MJforthemodelwithoutalineartrend)suggestsalong-periodgiantplanetorbitinganevolvedintermediate-massstar.Theeccentricityoftheorbitisamongthehighestoneseverdetectedforplanetsmovingaroundevolvedstars.

【 授权许可】

Unknown