Search for Planets around Giant Stars
Precise Doppler surveys of evolved stars have opened a new frontier in extrasolar planet searches during the past several years. Since 2001, we have been carrying out a Dopper survey of about 300 GK giants using a 1.88m telescope at Okayama Astrophysical Observatory in Japan and discovered 10 substellar companions so far. The planets show different properties in their mass and orbital parameters from those around solar-type dwarfs, which must reflect different history of formation and evolution of planetary systems in different types of stars. In order to extend the survey, since 2005, we have been carryng out new surveys of additional hundreds GK giants in the framework of intemational collaborations with Chinese and Korean astronomers using a 2.16m telescope at Xinglong station in China and a 1.8m telescope at Bohyunsan Optical Astronomy Observatory in Korea (East-Asian Planet Search Network; EAPSNET). Recently, we also started surveys using 8.2m Subaru telescope and 1.5m Russian-Turkish RTT150 telescope. We here report current status of these projects and discuss properties of planets around evolved stars.
stars planetary systems techniques radial velocities
B. Sato
Global Edge Institute, Tokyo Institute of Technology, Tokyo, Japan
国际会议
The 10th Asian-Pacific Regional International Astronomical Union Meeting(第十届亚洲及太平洋地区天文学大会 APRIM)
昆明
英文
65-67
2008-08-03（万方平台首次上网日期，不代表论文的发表时间）