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3 results on '"Masahide Hidai"'

1. The infrared Doppler (IRD) instrument for the Subaru telescope: instrument description and commissioning results

Author

Eiji Kambe, Masato Ishizuka, Hidenori Genda, Yuka Fujii, Masahiro Ogihara, Masahiko Hayashi, Yutaka Hayano, Jungmi Kwon, Masayuki Kuzuhara, Yosuke Tanaka, Tetsuya Nagata, Yasunori Hori, Eiichiro Kokubo, Tomoyuki Kudo, Haruka Baba, Ken Kashiwagi, Tadashi Nakajima, Klaus W. Hodapp, Ko Hosokawa, Donald N. B. Hall, Norio Narita, Naruhisa Takato, Nobuhiko Kusakabe, Yuji Ikeda, Wako Aoki, Takashi Kurokawa, Masahiro N. Machida, Hiroshi Terada, Jun Nishikawa, Takayuki Kotani, Jun-Ichi Morino, Hajime Kawahara, Hiroki Harakawa, Jun Hashimoto, Guyon Olivier, Akihiko Fukui, Bun'ei Sato, Hideyuki Izumiura, Hiroyuki Tako Ishikawa, Daehyeon Oh, Akitoshi Ueda, Hiroshi Suto, Motohide Tamura, Hideki Takami, Tsukasa Kokubo, Masashi Omiya, Taro Matsuo, Shogo Nishiyama, S. Jacobson, Tomonori Usuda, Masahiro Ikoma, Takahiro Mori, Mihoko Konishi, Teruyuki Hirano, Masahide Hidai, Tomoyasu Yamamuro, Nemanja Jovanovic, Evans, Christopher J., Simard, Luc, and Takami, Hideki

Subjects
Physics, 010504 meteorology & atmospheric sciences, Spectrometer, business.industry, Near-infrared spectroscopy, Astrophysics::Instrumentation and Methods for Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, First light, 01 natural sciences, Exoplanet, Radial velocity, symbols.namesake, Optics, 0103 physical sciences, symbols, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Spectral resolution, Subaru Telescope, business, 010303 astronomy & astrophysics, Doppler effect, Astrophysics::Galaxy Astrophysics, 0105 earth and related environmental sciences
Abstract

The Infrared Doppler (IRD) instrument is a fiber-fed high-resolution NIR spectrometer for the Subaru telescope covering the Y,J,H-bands simultaneously with a maximum spectral resolution of 70,000. The main purpose of IRD is a search for Earth-mass planets around nearby M-dwarfs by precise radial velocity measurements, as well as a spectroscopic characterization of exoplanet atmospheres. We report the current status of the instrument, which is undergoing commissioning at the Subaru Telescope, and the first light observation successfully done in August 2017. The general description of the instrument will be given including spectrometer optics, fiber injection system, cryogenic system, scrambler, and laser frequency comb. A large strategic survey mainly focused on late-type M-dwarfs is planned to start from 2019.

Published
2018
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2. Infrared Doppler instrument (IRD) for the Subaru telescope to search for Earth-like planets around nearby M-dwarfs

Author

Tomoyasu Yamamuro, Dehyun Oh, Eiji Kambe, Yuji Ikeda, Takuya Suenaga, Masahide Hidai, Masahiro Ogihara, Donald N. B. Hall, Jungmi Kwon, Tetsuya Nagata, Yosuke Tanaka, Masahiko Hayashi, Ken Kashiwagi, Wako Aoki, Sadahiro Inoue, Hirohi Onuki, Haruka Baba, Masahiro Ikoma, Yasushi Okuyama, Yutaka Hayano, Klaus W. Hodapp, Hidenori Genda, Hiroshi Terada, Takashi Kurokawa, Masahiro N. Machida, Shota Suzuki, Hajime Kawahara, Naruhisa Takato, Masashi Omiya, Bun'ei Sato, Yuka Fujii, Motohide Tamura, Eiichiro Kokubo, Takayuki Kotani, Tomoyuki Kudo, Akihiko Fukui, Yasunori Hori, Jun Nishikawa, Nobuhiko Kusakabe, Hideki Takami, Norio Narita, Jun-Ichi Morino, Masayuki Kuzuhara, Hideyuki Izumiura, Chihiro Tachinami, Hiroshi Suto, Jun Hashimoto, Taro Matsuo, Tomonori Usuda, Hiroki Harakawa, Yasuhiro H. Takahashi, Teruyuki Hirano, Olivier Guyon, and Shogo Nishiyama

Subjects
Physics, Radial velocity, symbols.namesake, Spectrometer, Planet, Infrared, Near-infrared spectroscopy, symbols, Astronomy, Subaru Telescope, Doppler effect, Exoplanet
Abstract

We report the current status of the Infrared Doppler (IRD) instrument for the Subaru telescope, which aims at detecting Earth-like planets around nearby M darwfs via the radial velocity (RV) measurements. IRD is a fiber-fed, near infrared spectrometer which enables us to obtain high-resolution spectrum (R~70000) from 0.97 to 1.75 μm. We have been developing new technologies to achieve 1m/s RV measurement precision, including an original laser frequency comb as an extremely stable wavelength standard in the near infrared. To achieve ultimate thermal stability, very low thermal expansion ceramic is used for most of the optical components including the optical bench.

Published
2014
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3. Infrared Doppler instrument for the Subaru Telescope (IRD)

Author

Dehyun Oh, Yuji Ikeda, Hideyuki Izumiura, Donald N. B. Hall, Masahide Hidai, Hiroki Harakawa, E. Kokubo, Yosuke Tanaka, Nobuhiko Kusakabe, Klaus W. Hodapp, Masashi Omiya, Yuka Fujii, Takuya Suenaga, Jun-Ichi Morino, Masahiro Ogihara, Ken Kashiwagi, Jun Hashimoto, Hiroshi Suto, Tetsuya Nagata, Jungmi Kwon, Hiroshi Terada, Yosuke Mizuno, Ryuji Suzuki, Sadahiro Inoue, Yasuhiro H. Takahashi, Teruyuki Hirano, Tomonori Usuda, Takayuki Kotani, Hidenori Genda, Tomoyuki Kudo, Akihiko Fukui, Motohide Tamura, Wako Aoki, Masahiko Hayashi, Masahiro Ikoma, Yasunori Hori, Eiji Kambe, S. Oshino, Naruhisa Takato, Hiroshi Ohnuki, Bun'ei Sato, Takashi Kurokawa, Masahiro N. Machida, Yo Washizaki, Yutaka Hayano, Chihiro Tachinami, Masayuki Kuzuhara, Taro Matsuo, Olivier Guyon, Shogo Nishiyama, Hideki Takami, Satoru Suzuki, Norio Narita, and Jun Nishikawa

Subjects
Physics, Spectrometer, business.industry, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Astrophysics::Cosmology and Extragalactic Astrophysics, Exoplanet, law.invention, Radial velocity, Telescope, symbols.namesake, Optics, law, symbols, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, business, Subaru Telescope, Adaptive optics, Doppler effect, Astrophysics::Galaxy Astrophysics, Echelle grating
Abstract

IRD is the near-infrared high-precision radial velocity instrument for the Subaru 8.2-m telescope. It is a relatively compact (~1m size) spectrometer with a new echelle-grating and Volume-Phase Holographic gratings covering 1-2 micron wavelengths combined with an original frequency comb using optical pulse synthesizer. The spectrometer will employ a 4096x4096-pixel HgCdTe array under testing at IfA, University of Hawaii. Both the telescope/Adaptive Optics and comb beams are fed to the spectrometer via optical fibers, while the instrument is placed at the Nasmyth platform of the Subaru telescope. Expected accuracy of the Doppler-shifted velocity measurements is about 1 m s-1. Helped with the large collecting area and high image quality of the Subaru telescope, IRD can conduct systematic radial velocity surveys of nearby middle-to-late M stars aiming for down to one Earth-mass planet. Systematic observational and theoretical studies of M stars and their planets for the IRD science are also ongoing. We will report the design and preliminary development progresses of the whole and each component of IRD.

Published
2012
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