A substellar companion to Pleiades HII 3441

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

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

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±5MJ based on three observations in the J-, H-, and Ks-bands. The spectral type is estimated to be M7 (∼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 10.0-8.8+26.1 %. This is consistent with multiplicity studies of both the Pleiades stars and other open clusters.

Original languageEnglish (US)
Article number92
JournalPublications of the Astronomical Society of Japan
Volume68
Issue number6
DOIs
StatePublished - Jan 1 2016

Keywords

  • Brown dwarfs
  • Stars: imaging
  • Stars: individual (Pleiades HII 3441)
  • Stars: low-mass

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'A substellar companion to Pleiades HII 3441'. Together they form a unique fingerprint.

  • Cite this

    Konishi, M., Matsuo, T., Yamamoto, K., Samland, M., Sudo, J., Shibai, H., Itoh, Y., Fukagawa, M., Sumi, T., Kudo, T., Hashimoto, J., Kuzuhara, M., Kusakabe, N., Abe, L., Akiyama, E., Brandner, W., Brandt, T. D., Carson, J. C., Feldt, M., ... Tamura, M. (2016). A substellar companion to Pleiades HII 3441. Publications of the Astronomical Society of Japan, 68(6), [92]. https://doi.org/10.1093/pasj/psw083