A Substellar Companion to Pleiades HII 3441

Konishi, Mihoko; Matsuo, Taro; Yamamoto, Kodai; Samland, Matthias; Sudo, Jun; Shibai, Hiroshi; Itoh, Yoichi; Fukagawa, Misato; Sumi, Takhiro; Kudo, Tomoyuki; Hashimoto, Jun; Kuzuhara, Masayuki; Kusakabe, Nobuhiko; Abe, Lyu; Akiyama, Eiji; Brandner, Wolfgang; Brandt, Timothy D.; Carson, Joseph C.; Feldt, Markus; Goto, Miwa; Grady, Carol A.; Guyon, OIivier; Hayano, Yutaka; Hayashi, Masahiko; Hayashi, Saeko S.; Henning, Thomas; Hodapp, Klaus W.; Ishii, Miki; Iye, Masanori; Janson, Markus; Kandori, Ryo; Knapp, Gillian R.; Kwon, Jungmi; McElwain, Michael W.; Mede, Kyle; Miyama, Shoken; Morino, Jun-Ichi; Moro-Martin, Amaya; Nishimura, Tetsuo; Oh, Daehyeon; Pyo, Tae-Soo; Serbyn, Eugene; Schlieder, Joshua E.; Suenaga, Takuya; Suto, Hiroshi; Suzuki, Ryuji; Takahashi, Yasuhiro H.; Takami, Michihiro; Takato, Naruhisa; Terada, Hiroshi; Thalman, Christian; Turner, Edwin L.; Watanabe, Makoto; Wisniewski, John P.; Yamada, Toru; Takami, Hideki; Usuda, Tomonori; Tamura, Motohide

We find a new substellar companion to the Pleiades member star, Pleiades HII 3441, using the Subaru telescope with adaptive optics. The discovery is made as part of the high-contrast imaging survey to search for planetary-mass and substellar companions in the Pleiades and young moving groups. The companion has a projected separation of 0". 49+/-0". 02 (66+/-2 au) and a mass of 68+/-5M(sub J) based on three observations in the J-, H-, and K(sub s)-bands. The spectral type is estimated to be M7 (approx. 2700 K), and thus no methane absorption is detected in the H band. Our Pleiades observations result in the detection of two substellar companions including one previously reported among 20 observed Pleiades stars, and indicate that the fraction of substellar companions in the Pleiades is about 10.0+26.1 −8.8 %. This is consistent with multiplicity studies of both the Pleiades stars and other open clusters.

Document ID

20170006552

Document Type

Reprint (Version printed in journal)

External Source(s)

doi:10.1093/pasj/psw083

Authors

Konishi, Mihoko (Tokyo Astronomical Observatory Mitaka, Japan)

Matsuo, Taro (Osaka Univ. Osaka, Japan)

Yamamoto, Kodai (Kyoto Univ. Japan)

Samland, Matthias (Max-Planck-Inst. fuer Astronomie Heidelberg, Germany)

Sudo, Jun (Osaka Univ. Osaka, Japan)

Shibai, Hiroshi (Osaka Univ. Osaka, Japan)

Itoh, Yoichi (Nishi-Harima Astronomical Observatory Japan)

Fukagawa, Misato (Nagoya Univ. Aichi, Japan)

Sumi, Takhiro (Osaka Univ. Osaka, Japan)

Kudo, Tomoyuki (Subaru Telescope Hilo, HI, United States)

Hashimoto, Jun (National Inst. of Natural Sciences Aichi, Japan)

Kuzuhara, Masayuki (Tokyo Institute of Technology Tokyo, Japan)

Kusakabe, Nobuhiko (National Inst. of Natural Sciences Aichi, Japan)

Abe, Lyu (Universite de Nice-Sophia Antipolis Valbonne, France)

Akiyama, Eiji (Tokyo Astronomical Observatory Mitaka, Japan)

Brandner, Wolfgang (Max-Planck-Inst. fuer Astronomie Heidelberg, Germany)

Brandt, Timothy D. (Institute for Advanced Study Princeton, NJ, United States)

Carson, Joseph C. (Charleston Coll. Charleston, SC, United States)

Feldt, Markus (Max-Planck-Inst. fuer Astronomie Heidelberg, Germany)

Goto, Miwa (Ludwig-Maximilians-Univ. Munich, Germany)

Grady, Carol A. (Eureka Scientific, Inc. Oakland, CA, United States)

Guyon, OIivier (Tokyo Astronomical Observatory Mitaka, Japan)

Hayano, Yutaka (Tokyo Astronomical Observatory Mitaka, Japan)

Hayashi, Masahiko (Tokyo Astronomical Observatory Mitaka, Japan)

Hayashi, Saeko S. (Tokyo Astronomical Observatory Mitaka, Japan)

Henning, Thomas (Max-Planck-Inst. fuer Astronomie Heidelberg, Germany)

Hodapp, Klaus W. (Hawaii Univ. Hilo, HI, United States)

Ishii, Miki (Tokyo Astronomical Observatory Mitaka, Japan)

Iye, Masanori (Tokyo Astronomical Observatory Mitaka, Japan)

Janson, Markus (Stockholm Univ. Sweden)

Kandori, Ryo (Tokyo Astronomical Observatory Mitaka, Japan)

Knapp, Gillian R. (Princeton Univ. Princeton, NJ, United States)

Kwon, Jungmi (Bunkyo Gakuin Univ. Tokyo, Japan)

McElwain, Michael W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)

Mede, Kyle (Bunkyo Gakuin Univ. Tokyo, Japan)

Miyama, Shoken (Hiroshima Univ. Japan)

Morino, Jun-Ichi (Tokyo Astronomical Observatory Mitaka, Japan)

Moro-Martin, Amaya (Space Telescope Science Inst. Baltimore, MD, United States)

Nishimura, Tetsuo (Tokyo Astronomical Observatory Mitaka, Japan)

Oh, Daehyeon (Tokyo Astronomical Observatory Mitaka, Japan)

Pyo, Tae-Soo (Tokyo Astronomical Observatory Mitaka, Japan)

Serbyn, Eugene (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)

Schlieder, Joshua E. (Max-Planck-Inst. fuer Astronomie Heidelberg, Germany)

Suenaga, Takuya (Tokyo Astronomical Observatory Mitaka, Japan)

Suto, Hiroshi (Tokyo Astronomical Observatory Mitaka, Japan)

Suzuki, Ryuji (Tokyo Astronomical Observatory Mitaka, Japan)

Takahashi, Yasuhiro H. (Tokyo Astronomical Observatory Mitaka, Japan)

Takami, Michihiro (Academia Sinica Taipei, Taiwan, Province of China)

Takato, Naruhisa (Tokyo Astronomical Observatory Mitaka, Japan)

Terada, Hiroshi (Tokyo Astronomical Observatory Mitaka, Japan)

Thalman, Christian (Swiss Federal Inst. of Technology Zurich, Switzerland)

Turner, Edwin L. (Princeton Univ. Princeton, NJ, United States)

Watanabe, Makoto (Okayama Univ. of Science Japan)

Wisniewski, John P. (Oklahoma Univ. Norman, OK, United States)

Yamada, Toru (Japan Aerospace Exploration Agency Kanagawa, Japan)

Takami, Hideki (Tokyo Astronomical Observatory Mitaka, Japan)

Usuda, Tomonori (Tokyo Astronomical Observatory Mitaka, Japan)

Tamura, Motohide (Tokyo Astronomical Observatory Mitaka, Japan)

Date Acquired

July 13, 2017

Publication Date

September 19, 2016

Publication Information

Publication: Publications of The Astronomical Society of Japan

Volume: 68

Issue: 6

ISSN: 0004-6264

Subject Category

Report/Patent Number

Funding Number(s)

Distribution Limits

Public

Other

Keywords

NTRS

NTRS - NASA Technical Reports Server