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

Published online by Cambridge University Press:  01 October 2007

Masashi Omiya ,
Hideyuki Izumiura ,
Bun'ei Sato ,
Michitoshi Yoshida ,
Eiji Kambe ,
Eri Toyota ,
Seitaro Urakawa ,
Seiji Masuda ,
Masahide Takada-Hidai  and
Inwoo Han
...Show all authors
Masashi Omiya
Affiliation:
Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan email: ohmiya@peacock.rh.u-tokai.ac.jp
Hideyuki Izumiura
Affiliation:
Okayama Astrophysical Observatory, National Astronomical Observatory of Japan, Asakuchi, Okayama 719-0232, Japan
Bun'ei Sato
Affiliation:
Global Edge Institute, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8550, Japan
Michitoshi Yoshida
Affiliation:
Okayama Astrophysical Observatory, National Astronomical Observatory of Japan, Asakuchi, Okayama 719-0232, Japan
Eiji Kambe
Affiliation:
Okayama Astrophysical Observatory, National Astronomical Observatory of Japan, Asakuchi, Okayama 719-0232, Japan
Eri Toyota
Affiliation:
Graduate School of Science, Kobe University, Kobe, Hyogo 657-8501, Japan
Seitaro Urakawa
Affiliation:
Japan Spaceguard Association, Shibuya-ku, Tokyo 151-0073, Japan
Seiji Masuda
Affiliation:
Tokushima Science Museum, Asutamu Land Tokushima, Itano-gun, Tokushima 779-0111, Japan
Masahide Takada-Hidai
Affiliation:
Liberal Arts Education Center, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
Inwoo Han
Affiliation:
Korea Astronomy and Space Science Institute, Daejeon 305-348, South Korea
Kang-Min Kim
Affiliation:
Korea Astronomy and Space Science Institute, Daejeon 305-348, South Korea
Byeong-Cheol Lee
Affiliation:
Korea Astronomy and Space Science Institute, Daejeon 305-348, South Korea Department of Astronomy and Atmospheric Sciences, Kyungpook National University, Daegu 702-701, South Korea
Tae Seog Yoon
Affiliation:
Department of Astronomy and Atmospheric Sciences, Kyungpook National University, Daegu 702-701, South Korea
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Abstract

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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.

Keywords

stars: low-massbrown dwarfstechniques: radial velocities
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S249: Exoplanets: Detection, Formation and Dynamics , October 2007 , pp. 53 - 56
Copyright
Copyright © International Astronomical Union 2008

References

Grether, D., & Lineweaver, C. H. 2006, ApJ, 640, 1051CrossRefGoogle Scholar
Halbwachs, J. L., Arenou, F., Mayor, M., Udry, S., & Queloz, D. 2000, A&A, 355, 581Google Scholar
Hatzes, A. P., Guenther, E. W., Endl, M., Cochran, W. D., Döllinger, M. P., & Bedalov, A. 2005, A&A, 437, 743Google Scholar
Izumiura, H. 1999, in Proc. 4th East Asian Meeting on Astronomy, ed. Chen, P.S. (Kunming: Yunnan Observatory), 77Google Scholar
Izumiura, H. 2005, Journal of Korean Astronomical Society, 38, 81CrossRefGoogle Scholar
Johnson, J. A., Marcy, G. W., Fischer, D. A., Henry, G. W., Wright, J. T., Isaacson, H., & McCarthy, C. 2006, ApJ, 652, 1724CrossRefGoogle Scholar
Johnson, J. A., Butler, R. P., Marcy, G. W., Fischer, D. A., Vogt, S. S., Wright, J. T., & Peek, K. M. G. 2007, ApJ, 670, 833CrossRefGoogle Scholar
Kambe, E., Sato, B., Takeda, Y., Ando, H., Noguchi, K., Aoki, W., Izumiura, H., Wada, S., Masuda, S., Okada, N., Shimizu, Y., Watanabe, E., Yoshida, M., Honda, S., Kawanomoto, S., 2002, PASJ, 54, 865CrossRefGoogle Scholar
Kim, K.-M., Jang, B.-H., Han, I., Jang, J. G., Sung, H. C., Chun, M.-Y., Hyung, S., Yoon, T.-S., Vogt, S. S., 2002, Journal of Korean Astronomical Society, 35, 221CrossRefGoogle Scholar
Kim, K. M., Han, I., Valyavin, G., Plachinda, S., Jang, J. G., Jang, B.-H., Seong, H. C., Kang, D. I., Park, B. G., Yoon, T. S., and Vogt, S., 2007, PASP, 119, 1052.CrossRefGoogle Scholar
Liu, Y. J., Sato, B., Zhao, G., Noguchi, K., Wang, H., Kambe, E., Ando, H., Izumiura, H., Chen, Y. Q., Okada, N., Toyota, E., Omiya, M., Masuda, S., Takeda, Y., Murata, D., Itoh, Y., Yoshida, M., Kokubo, E., & Ida, S., 2008, ApJ, 672, 553CrossRefGoogle Scholar
Marcy, G. W., & Butler, R. P. 2000, PASP, 112, 137CrossRefGoogle Scholar
Niedzielski, A., Konacki, M., Wolszczan, A., Nowak, G., Maciejewski, G., Gelino, C. R., Shao, M., Shetrone, M., & Ramsey, L. W. 2007, ApJ, 669, 1354CrossRefGoogle Scholar
Sato, B., Kambe, E., Takeda, Y., Izumiura, H., & Ando, H. 2002, PASJ, 54, 873CrossRefGoogle Scholar
Sato, B., Ando, H., Kambe, E., Takeda, Y., Izumiura, H., Masuda, S., Watanabe, E., Noguchi, K., Wada, S., Okada, N., Koyano, H., Maehara, H., Norimoto, Y., Okada, T., Shimizu, Y., Uraguchi, F., Yanagisawa, K., & Yoshida, M. 2003, ApJ, 597, L157CrossRefGoogle Scholar
Sato, B., Kambe, E., Takeda, Y., Izumiura, H., Masuda, S., & Ando, H. 2005, PASJ, 57, 97CrossRefGoogle Scholar
Sato, B., Izumiura, H., Toyota, E., Kambe, E., Takeda, Y., Masuda, S., Omiya, M., Murata, D., Itoh, Y., Ando, H., Yoshida, M., Ikoma, M., Kokubo, E., & Ida, S. 2007, ApJ, 661, 527CrossRefGoogle Scholar