arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1608.01780astro-ph.EPastro-ph.SR
收藏

昂宿星团HII 3441的一颗亚恒星伴星

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 Hashimo… 展开作者

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 Goto, Carol 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-Mart'in, 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

备注：
Main text (14 pages, 4 figures, 4 tables), and Supplementary data (8 pages, 3 tables). Accepted for Publications of Astronomical Society of Japan
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

我们发现了一个新的亚恒星伴星的昴星团成员星，昴星团HII 3441，使用斯巴鲁望远镜与自适应光学。这一发现是作为高对比度成像调查的一部分，以寻找昴星团和年轻移动群体中的行星质量和亚恒星同伴。根据在J-、H-和K_S-波段的三次观测，伴星的预计距离为0”.49 +/- 0”.02（66 +/- 2 AU），质量为68 +/- 5 M_J。光谱型估计为M7（~2700 K），因此在H带中未检测到甲烷吸收。我们对昂星团的观测结果表明，在观测到的20颗昂星团恒星中，发现了两颗亚恒星伴星，其中包括一颗先前报道的伴星，并表明昂星团中亚恒星伴星的比例约为10.0 + 26.1/-8.8%。这与对昴星团和其他疏散星团的多重性研究是一致的。

英文摘要：

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 +/- 5 M_J based on three observations in the J-, H-, and K_S-band. 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 +26.1/-8.8 %. This is consistent with multiplicity studies of both the Pleiades stars and other open clusters.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

↑