A Korea-Japan planet search program: Current status and discovery of a brown dwarf candidate

Autor:	Eiji Kambe, S. Masuda, Masashi Omiya, Bun'ei Sato, Kang-Min Kim, Masahide Takada-Hidai, Seitaro Urakawa, Byeong-Cheol Lee, Tae Seog Yoon, Hideyuki Izumiura, Eri Toyota, Inwoo Han, Michitoshi Yoshida
Rok vydání:	2007
Předmět:	Radial velocity Physics Stars Space and Planetary Science Planet Primary (astronomy) Brown dwarf Astronomy Astronomy and Astrophysics Astrophysics Planetary system Circumbinary planet Blue dwarf
Zdroj:	Proceedings of the International Astronomical Union. 3:53-56
ISSN:	1743-9221 1743-9213
Popis:	Since 2005, we have been carrying out a precise radial velocity survey of about 190 intermediate-mass (1.5-5 M⊙) G and K giants at Bohyunsan Optical Astronomy Observatory (BOAO) in Korea and Okayama Astrophysical Observatory (OAO) in Japan, which aims to reveal statistical properties of planetary systems around intermediate-mass stars. We have finished the first screening of 120 stars so far and have identified 5 candidates with large periodic radial velocity variations. One of the candidates turned out to be orbited by a brown dwarf mass companion with minimum mass of 37.6 MJup and semimajor axis of 1.71 AU. The primary star has a mass of 3.9 M⊙, which ranks among the most massive stars with substellar companions. Our discovery may support the current view obtained from results of planet searches around intermediate-mass stars that massive substellar companions tend to form around massive stars.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c833a6ab11411db78e98d010d71680f7 https://doi.org/10.1017/s1743921308016360 Zobrazit plný text záznamu Plný text ve formátu PDF