Detailed studies on extrasolar-planets orbiting intermediate-mass stars based on radial velocimetry and photometry

2013 Fiscal Year Final Research Report

• Project/Area Number: 23540263
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Astronomy
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: SATO BUNEI 東京工業大学, 理工学研究科, 准教授 (40397823)
• Co-Investigator(Renkei-kenkyūsha): IZUMIURA Hideyuki 国立天文台, 岡山天体物理観測所, 准教授 (00211730) ; KAMBE Eiji 国立天文台, 岡山天体物理観測所, 特任助教 (80435510) ; ANDO Hiroyasu 国立天文台, 光赤外研究部, 名誉教授 (90111559) ; TAKEDA Yoichi 国立天文台, 光赤外研究部, 准教授 (50373189) ; NOGUCHI Kunio 国立天文台, 光赤外研究部, 教授 (10111824) ; YOSHIDA Michitoshi 広島大学, 宇宙科学センター, 教授 (90270446) ; IKOMA Masahiro 東京大学, 理学系研究科, 准教授 (80397025) ; IDA Shigeru 東京工業大学, 地球生命研究所, 教授 (60211736)
• Project Period (FY): 2011 – 2013
• Keywords: 天文学 / 視線速度観測 / 測光観測 / 太陽系外惑星 / 中質量星

Research Abstract

We conducted a planet-search program with a precise Doppler technique targeting intermediate-mass giants and dwarfs in order to uncover poplulations of less-massive and short-period planets around such stars. We succeeded in discovering new planets less massive than two Jupiter-mass around interemdiate-mass giants, which have rarely been found around them. Also, we identified a planet candidate around an early-type star in an open cluster. The discoveries offer new insight into origins of mass and orbital-period distribution of planets around intermediate-mass stars.

Research Products

• [Journal Article] Planetary Companions to Three Evolved Intermediate-Mass Stars: HD 2952, HD 120084, and ωSerpentis (2013)
  • Author(s): Sato, B., Omiya, M., Harakawa, H., Liu, Y.-J., Izumiura, H., Kambe, E., Takeda, Y., Yoshida, M., Itoh, Y., Ando, H., Kokubo, E., Ida, S
  • Journal Title: Publications of the Astronomical Society of Japan Volume: Vol. 65 Pages: Article No. 85
  • DOI: 10.1093/pasj/65.4.85
  • Peer Reviewed
• [Journal Article] A Double Planetary System around the Evolved Intermediate-mass Star HD 4732 (2013)
  • Author(s): Sato, B., Omiya, M., Wittenmyer, R.A., Harakawa, H., Nagasawa, M., Izumiura, H., Kambe, E., Takeda, Y., Yoshida, M., Itoh, Y., Ando, H., Kokubo, E., Ida, S
  • Journal Title: The Astrophysical Journal Volume: Vol. 762 Pages: article id. 9
  • DOI: 10.1088/0004-637X/762/1/9
  • Peer Reviewed
• [Journal Article] Substellar Companions to Seven Evolved Intermediate-Mass Stars (2012)
  • Author(s): Sato, B., Omiya, M., Harakawa, H., Izumiura, H., Kambe, E., Takeda, Y., Yoshida, M., Itoh, Y., Ando, H., Kokubo, E., Ida, S
  • Journal Title: Publications of the Astronomical Society of Japan Volume: Vol. 64 Pages: Article No. 135
  • DOI: 10.1093/pasj/64.6.135
  • Peer Reviewed
• [Journal Article] A possible substellar companion to the intermediate-mass giant HD 175679 (2012)
  • Author(s): Wang, L., Sato, B., Zhao, G., Liu, Y.-J., Noguchi, K., Ando, H., Izumiura, H., Kambe, E., Omiya, M., Harakawa, H., Liu, F., Wu, X.-S., Takeda, Y., Yoshida, M., Kokubo, E
  • Journal Title: Researches in Astronomy and Astrophysics Volume: Vol. 12 Pages: 84-92
  • DOI: 10.1088/1674-4527/12/1/007
  • Peer Reviewed
• [Presentation] 中質量 GK 型巨星を周回する新たな惑星系の発見: HD 4732, HD 2952, HD 120084, ω Serpentis (2013)
  • Author(s): 佐藤文衛, 大宮正士, 原川紘季, 長沢真樹子, Robert Wittenmyer , Liu Yujuan , 泉浦秀行, 神戸栄治, 竹田洋一, 安藤裕康, 小久保英一郎, 吉田道利, 伊藤洋一, 井田茂
  • Organizer: 日本天文学会秋季年会
  • Place of Presentation: 東北大学
  • Year and Date: 2013-09-11
• [Presentation] 岡山 /HIDES による中質量 GK 型星を周回する新たな惑星系の発見 (2012)
  • Author(s): 佐藤文衛, 大宮正士, 原川紘季, 泉浦秀行, 神戸栄治, 竹田洋一, 安藤裕康, 小久保英一郎, 吉田道利, 伊藤洋一, 井田茂
  • Organizer: 日本天文学会秋季年会
  • Place of Presentation: 大分大学
  • Year and Date: 2012-09-20