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Title:
Direct Imaging Discovery of a "Super-Jupiter" around the Late B-type Star κ And
Authors:
Carson, J.; Thalmann, C.; Janson, M.; Kozakis, T.; Bonnefoy, M.; Biller, B.; Schlieder, J.; Currie, T.; McElwain, M.; Goto, M.; Henning, T.; Brandner, W.; Feldt, M.; Kandori, R.; Kuzuhara, M.; Stevens, L.; Wong, P.; Gainey, K.; Fukagawa, M.; Kuwada, Y.; Brandt, T.; Kwon, J.; Abe, L.; Egner, S.; Grady, C.; Guyon, O.; Hashimoto, J.; Hayano, Y.; Hayashi, M.; Hayashi, S.; Hodapp, K.; Ishii, M.; Iye, M.; Knapp, G.; Kudo, T.; Kusakabe, N.; Matsuo, T.; Miyama, S.; Morino, J.; Moro-Martin, A.; Nishimura, T.; Pyo, T.; Serabyn, E.; Suto, H.; Suzuki, R.; Takami, M.; Takato, N.; Terada, H.; Tomono, D.; Turner, E.; Watanabe, M.; Wisniewski, J.; Yamada, T.; Takami, H.; Usuda, T.; Tamura, M.
Affiliation:
AA(Department of Physics & Astronomy, College of Charleston, 58 Coming Street, Charleston, SC 29424, USA ; Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany), AB(Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany ; Astronomical Institute "Anton Pannekoek," University of Amsterdam, Science Park 904, 1098-XH Amsterdam, The Netherlands), AC(Department of Astrophysical Sciences, Princeton University, NJ 08544, USA), AD(Department of Physics & Astronomy, College of Charleston, 58 Coming Street, Charleston, SC 29424, USA), AE(Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany), AF(Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany), AG(Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany), AH(ExoPlanets and Stellar Astrophysics Laboratory, Code 667, Goddard Space Flight Center, Greenbelt, MD 20771, USA), AI(ExoPlanets and Stellar Astrophysics Laboratory, Code 667, Goddard Space Flight Center, Greenbelt, MD 20771, USA), AJ(Young Stars and Star Formation Universitäts-Sternwarte München, Ludwig-Maximilians-Universität, D-81679 München, Germany), AK(Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany), AL(Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany), AM(Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany), AN(National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan), AO(National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan; Department of Earth and Planetary Science, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan), AP(Department of Physics & Astronomy, College of Charleston, 58 Coming Street, Charleston, SC 29424, USA), AQ(Department of Physics & Astronomy, College of Charleston, 58 Coming Street, Charleston, SC 29424, USA), AR(Department of Physics & Astronomy, College of Charleston, 58 Coming Street, Charleston, SC 29424, USA), AS(Department of Earth and Space Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan), AT(Department of Earth and Space Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan), AU(Department of Astrophysical Sciences, Princeton University, NJ 08544, USA), AV(National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan), AW(Laboratoire Lagrange (UMR 7293), Universite de Nice-Sophia Antipolis, CNRS, Observatoire de la Cote dAzur, 28 avenue Valrose, F-06108 Nice Cedex 2, France), AX(Subaru Telescope, 650 North Aohoku Place, Hilo, HI 96720, USA), AY(ExoPlanets and Stellar Astrophysics Laboratory, Code 667, Goddard Space Flight Center, Greenbelt, MD 20771, USA), AZ(Subaru Telescope, 650 North Aohoku Place, Hilo, HI 96720, USA), BA(National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan), BB(Subaru Telescope, 650 North Aohoku Place, Hilo, HI 96720, USA), BC(National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan), BD(Subaru Telescope, 650 North Aohoku Place, Hilo, HI 96720, USA), BE(Institute for Astronomy, University of Hawaii, 640 N. Aohoku Place, Hilo, HI 96720, USA), BF(Subaru Telescope, 650 North Aohoku Place, Hilo, HI 96720, USA), BG(National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan), BH(Department of Astrophysical Sciences, Princeton University, NJ 08544, USA), BI(Subaru Telescope, 650 North Aohoku Place, Hilo, HI 96720, USA), BJ(National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan), BK(Department of Astronomy, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan), BL(Hiroshima University, 1-3-2, Kagamiyama, Higashihiroshima, Hiroshima 739-8511, Japan), BM(National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan), BN(Departamento de Astrofísica, CAB (INTA-CSIC), Instituto Nacional Técnica Aeroespacial, Torrejón de Ardoz, E-28850 Madrid, Spain), BO(Subaru Telescope, 650 North Aohoku Place, Hilo, HI 96720, USA), BP(Subaru Telescope, 650 North Aohoku Place, Hilo, HI 96720, USA), BQ(Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 171-113, USA), BR(National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan), BS(National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan), BT(Institute of Astronomy and Astrophysics, Academia Sinica, P.O. Box 23-141, Taipei 10617, Taiwan), BU(Subaru Telescope, 650 North Aohoku Place, Hilo, HI 96720, USA), BV(Subaru Telescope, 650 North Aohoku Place, Hilo, HI 96720, USA), BW(Subaru Telescope, 650 North Aohoku Place, Hilo, HI 96720, USA), BX(Department of Astrophysical Sciences, Princeton University, NJ 08544, USA; Kavli Institute for Physics and Mathematics of the Universe, The University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa, Chiba 277-8568, Japan), BY(Department of Cosmosciences, Hokkaido University, Kita-ku, Sapporo, Hokkaido 060-0810, Japan), BZ(HL Dodge Department of Physics & Astronomy, University of Oklahoma, 440 W Brooks St, Norman, OK 73019, USA), CA(Astronomical Institute, Tohoku University, Aoba-ku, Sendai, Miyagi 980-8578, Japan), CB(National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan), CC(Subaru Telescope, 650 North Aohoku Place, Hilo, HI 96720, USA), CD(National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan)
Publication:
The Astrophysical Journal Letters, Volume 763, Issue 2, article id. L32, 6 pp. (2013). (ApJL Homepage)
Publication Date:
02/2013
Origin:
IOP
Astronomy Keywords:
brown dwarfs, planets and satellites: detection, stars: massive
DOI:
10.1088/2041-8205/763/2/L32
Bibliographic Code:
2013ApJ...763L..32C

Abstract

We present the direct imaging discovery of an extrasolar planet, or possible low-mass brown dwarf, at a projected separation of 55 ± 2 AU (1.''058 ± 0.''007) from the B9-type star κ And. The planet was detected with Subaru/HiCIAO during the SEEDS survey and confirmed as a bound companion via common proper motion measurements. Observed near-infrared magnitudes of J = 16.3 ± 0.3, H = 15.2 ± 0.2, K s = 14.6 ± 0.4, and L' = 13.12 ± 0.09 indicate a temperature of ~1700 K. The galactic kinematics of the host star are consistent with membership in the Columba Association, implying a corresponding age of 30+20 -10 Myr. The system's age, combined with the companion photometry, points to a model-dependent companion mass ~12.8 M Jup. The host star's estimated mass of 2.4-2.5 M places it among the most massive stars ever known to harbor an extrasolar planet or low-mass brown dwarf. While the mass of the companion is close to the deuterium burning limit, its mass ratio, orbital separation, and likely planet-like formation scenario imply that it may be best defined as a "super-Jupiter" with properties similar to other recently discovered companions to massive stars.

Based on data collected at Subaru Telescope, which is operated by the National Astronomical Observatory of Japan.


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