自然・環境科学研究所 - 兵庫県立大学研究者情報

研究キーワード

光学赤外線天文学 ,太陽系外惑星 ,星惑星形成

研究分野

自然科学一般 / 天文学 /

委員歴

2022年

-

現在

東京大学アタカマ望遠鏡科学諮問委員会

国立天文台すばる科学諮問委員会

論文

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High ecliptic latitude survey for small main-belt asteroids

Tsuyoshi Terai Jun Takahashi Yoichi Itoh

Astronomical Journal 146(5) 2013年11月 [査読有り]

Main-belt asteroids have been continuously colliding with one another since they were formed. Their size distribution is primarily determined by the size dependence of asteroid strength against catastrophic impacts. The strength scaling law as a f...

Measurements of the Ca II infrared triplet lines of young stellar objects

Keiko Moto'Oka Yoichi Itoh

Research in Astronomy and Astrophysics 13(10) 1189-1201 2013年10月 [査読有り]

Equivalent widths and line widths of Ca II infrared triplet emission lines were measured in the high-resolution optical spectra of 39 young stellar objects. We found that the equivalent widths of the emission lines decrease with stellar evolution....

Planetary companions to three evolved intermediate-mass stars: HD2952, HD120084, and ω serpentis

Bun'ei Sato Masashi Omiya Hiroki Harakawa Yu-Juan Liu Hideyuki Izumiura Eiji Kambe Yoichi Takeda Michitoshi Yoshida Yoichi Itoh Hiroyasu Ando Eiichiro Kokubo Shigeru Ida

Publications of the Astronomical Society of Japan 65(4) 85-85 2013年8月 [査読有り]

We report on the detections of planetary companions orbiting around three evolved intermediate-mass stars based on precise radial velocity measurements at Okayama Astrophysical Observatory. HD2952 (K0III, 2.5M) and ω Ser (G8III, 2.2M) host a relat...

THE SEEDS DIRECT IMAGING SURVEY FOR PLANETS AND SCATTERED DUST EMISSION IN DEBRIS DISK SYSTEMS

Markus Janson Timothy D. Brandt Amaya Moro-Martin Tomonori Usuda Christian Thalmann Joseph C. Carson Miwa Goto Thayne Currie M. W. McElwain Yoichi Itoh Misato Fukagawa Justin Crepp Masayuki Kuzuhara Jun Hashimoto Tomoyuki Kudo Nobuhiko Kusakabe Lyu Abe Wolfgang Brandner Sebastian Egner Markus Feldt Carol A. Grady Olivier Guyon Yutaka Hayano Masahiro Hayashi Saeko Hayashi Thomas Henning Klaus W. Hodapp Miki Ishii Masanori Iye Ryo Kandori Gillian R. Knapp Jungmi Kwon Taro Matsuo Shoken Miyama Jun-Ichi Morino Tetsuro Nishimura Tae-Soo Pyo Eugene Serabyn Takuya Suenaga Hiroshi Suto Ryuji Suzuki Yasuhiro Takahashi Michihiro Takami Naruhisa Takato Hiroshi Terada Daego Tomono Edwin L. Turner Makoto Watanabe John Wisniewski Toru Yamada Hideki Takami Motohide Tamura

ASTROPHYSICAL JOURNAL 773(1) 2013年8月 [査読有り]

Debris disks around young main-sequence stars often have gaps and cavities which for a long time have been interpreted as possibly being caused by planets. In recent years, several giant planet discoveries have been made in systems hosting disks o...

Direct Imaging Search for Extrasolar Planets in the Pleiades

Kodai Yamamoto Taro Matsuo Hiroshi Shibai Yoichi Itoh Mihoko Konishi Jun Sudo Ryoko Tanii Misato Fukagawa Takahiro Sumi Tomoyuki Kudo Jun Hashimoto Nobuhiko Kusakabe Lyu Abe Wolfgang Brandner Timothy D. Brandt Joseph Carson Thayne Currie Sebastian E. Egner Markus Feldt Miwa Goto Carol Grady Olivier Guyon Yutaka Hayano Masahiko Hayashi Saeko Hayashi Thomas Henning Klaus Hodapp Miki Ishii Masanori Iye Markus Janson Ryo Kandori Gillian R. Knapp Masayuki Kuzuhara Jungmi Kwon Mike McElwain Shoken Miyama Jun-Ichi Morino Amaya Moro-Martin June Nishikawa Tetsuo Nishimura Tae-Soo Pyo Eugene Serabyn Hiroshi Suto Ryuji Suzuki Michihiro Takami Naruhisa Takato Hiroshi Terada Christian Thalmann Daigo Tomono Edwin L. Turner John Wisniewski Makoto Watanabe Toru Yamada Hideki Takami Tomonori Usuda Motohide Tamura

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 65(4) 2013年8月 [査読有り]

We carried out an imaging survey for extrasolar planets around stars in the Pleiades (125 Myr, 135 pc) in the H and K-S bands using HiCIAO combined with adaptive optics, AO188, on the Subaru telescope. We found 13 companion candidates fainter than...