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High-Contrast Imaging of Intermediate-Mass Giants with Long-Term Radial Velocity Trends.
Journal article

High-Contrast Imaging of Intermediate-Mass Giants with Long-Term Radial Velocity Trends.

  • Ryu T SOKENDAI, The Graduate University for Advanced Studies, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
  • Sato B Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8551, Japan.
  • Kuzuhara M Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8551, Japan.
  • Narita N SOKENDAI, The Graduate University for Advanced Studies, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
  • Takahashi YH Department of Astronomy, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
  • Uyama T Department of Astronomy, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
  • Kudo T Subaru Telescope, National Astronomical Observatory of Japan, 650 North Aohoku Place, Hilo, HI96720, USA.
  • Kusakabe N Astrobiology Center, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan.
  • Hashimoto J Astrobiology Center, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan.
  • Omiya M National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
  • Harakawa H National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
  • Abe L Laboratoire Lagrange (UMR 7293), Universite de Nice-Sophia Antipolis, CNRS, Observatoire de la Coted'azur,28 avenue Valrose, 06108 Nice Cedex 2, France.
  • Ando H National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
  • Brandner W Max Planck Institute for Astronomy, Königstuhl 17, 69117 Heidelberg, Germany.
  • Brandt TD Astrophysics Department, Institute for Advanced Study, Princeton, NJ, USA.
  • Carson JC Department of Physics and Astronomy, College of Charleston, 58 Coming St., Charleston, SC 29424, USA.
  • Currie T Subaru Telescope, National Astronomical Observatory of Japan, 650 North Aohoku Place, Hilo, HI96720, USA.
  • Egner S Subaru Telescope, National Astronomical Observatory of Japan, 650 North Aohoku Place, Hilo, HI96720, USA.
  • Feldt M Max Planck Institute for Astronomy, Königstuhl 17, 69117 Heidelberg, Germany.
  • Goto M Universitäts-Sternwarte Munchen, Ludwig-Maximilians-Universität, Scheinerstr. 1, 81679 Munchen,Germany.
  • Grady CA Exoplanets and Stellar Astrophysics Laboratory, Code 667, Goddard Space Flight Center, Greenbelt, MD 20771, USA.
  • Guyon O Subaru Telescope, National Astronomical Observatory of Japan, 650 North Aohoku Place, Hilo, HI96720, USA.
  • Hayano Y Subaru Telescope, National Astronomical Observatory of Japan, 650 North Aohoku Place, Hilo, HI96720, USA.
  • Hayashi M National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
  • Hayashi SS Subaru Telescope, National Astronomical Observatory of Japan, 650 North Aohoku Place, Hilo, HI96720, USA.
  • Hełminiak KG Subaru Telescope, National Astronomical Observatory of Japan, 650 North Aohoku Place, Hilo, HI96720, USA.
  • Henning T Max Planck Institute for Astronomy, Königstuhl 17, 69117 Heidelberg, Germany.
  • Hodapp KW Institute for Astronomy, University of Hawaii, 640 N. A'ohoku Place, Hilo, HI 96720, USA.
  • Ida S Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8551, Japan.
  • Ishii M National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
  • Itoh Y Nishi-Harima Astronomical Observatory, Center for Astronomy,University of Hyogo, 407-2, Nishigaichi, Sayo, Hyogo, 679-5313, Japan.
  • Iye M National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
  • Izumiura H SOKENDAI, The Graduate University for Advanced Studies, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
  • Janson M Department of Astrophysical Science, Princeton University, Peyton Hall, Ivy Lane, Princeton, NJ08544, USA.
  • Kambe E Okayama Astrophysical Observatory, National Astronomical Observatory of Japan, Kamogata, Okayama 719-0232, Japan.
  • Kandori R National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
  • Knapp GR Department of Astrophysical Science, Princeton University, Peyton Hall, Ivy Lane, Princeton, NJ08544, USA.
  • Kokubo E SOKENDAI, The Graduate University for Advanced Studies, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
  • Kwon J Department of Astronomy, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
  • Matsuo T Department of Astronomy, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto, Kyoto 606-8502, Japan.
  • Mayama S SOKENDAI, The Graduate University for Advanced Studies, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
  • McElwain MW Exoplanets and Stellar Astrophysics Laboratory, Code 667, Goddard Space Flight Center, Greenbelt, MD20771, USA.
  • Mede K Department of Astronomy, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
  • Miyama S Hiroshima University, 1-3-2, Kagamiyama, Higashihiroshima, Hiroshima 739-8511, Japan.
  • Morino JI National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
  • Moro-Martin A Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA.
  • Nishimura T Subaru Telescope, National Astronomical Observatory of Japan, 650 North Aohoku Place, Hilo, HI96720, USA.
  • Pyo TS Subaru Telescope, National Astronomical Observatory of Japan, 650 North Aohoku Place, Hilo, HI96720, USA.
  • Serabyn E Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, 171-113, USA.
  • Suenaga T SOKENDAI, The Graduate University for Advanced Studies, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
  • Suto H National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
  • Suzuki R National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
  • Takami M Institute of Astronomy and Astrophysics, Academia Sinica, P.O. Box 23-141, Taipei 10617, Taiwan.
  • Takato N Subaru Telescope, National Astronomical Observatory of Japan, 650 North Aohoku Place, Hilo, HI96720, USA.
  • Takeda Y SOKENDAI, The Graduate University for Advanced Studies, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
  • Terada H National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
  • Thalmann C ETH Zurich, Institute for Astronomy, Wolfgang-Pauli-Strasse 27, 8093 Zurich, Switzerland.
  • Turner EL Department of Astronomy, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto, Kyoto 606-8502, Japan.
  • Watanabe M Department of Cosmosciences, Hokkaido University, Kita-ku, Sapporo, Hokkaido 060-0810, Japan.
  • Wisniewski J H. L. Dodge Department of Physics & Astronomy, University of Oklahoma, 440 W Brooks St Norman, OK 73019, USA.
  • Yamada T Astronomical Institute, Tohoku University, Aoba-ku, Sendai, Miyagi 980-8578, Japan.
  • Yoshida M Hiroshima Astrophysical Science Center, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan.
  • Takami H National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
  • Usuda T National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
  • Tamura M National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
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  • 2020-08-06
Published in:
  • The Astrophysical journal. - 2016
binaries: general
–methods: observational
–planetary systems – stars: individual(γ Hya, ι Dra, HD 5608, HD 14067, HD 109272)
–techniques: high angular resolution
–techniques: radial velocities
English A radial velocity (RV) survey for intermediate-mass giants has been operated for over a decade at Okayama Astrophysical Observatory (OAO). The OAO survey has revealed that some giants show long-term linear RV accelerations (RV trends), indicating the presence of outer companions. Direct imaging observations can help clarify what objects generate these RV trends. We present the results of high-contrast imaging observations of six intermediate-mass giants with long-term RV trends using the Subaru Telescope and HiCIAO camera. We detected co-moving companions to γ Hya , HD 5608 B (0.10 ± 0.01M ⊙), and HD 109272 B (0.28 ± 0.06M ⊙). For the remaining targets(ι Dra, 18 Del, and HD 14067) we exclude companions more massive than 30-60 M Jup at projected separations of 1''-7''. We examine whether these directly imaged companions or unidentified long-period companions can account for the RV trends observed around the six giants. We find that the Kozai mechanism can explain the high eccentricity of the inner planets ι Dra b, HD 5608 b, and HD 14067 b.
Language
  • English
Open access status
green
Identifiers
Persistent URL
https://sonar.ch/global/documents/77895
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