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Satoshi Hamano, Naoto Kobayashi, Hideyo Kawakita, Yuji Ikeda, Sohei Kondo, Hiroaki Sameshima, Akira Arai, Noriyuki Matsunaga, Chikako Yasui, Misaki Mizumoto, Kei Fukue, Natsuko Izumi, Shogo Otsubo & Keiichi Takenaka

A Survey of Near-infrared Diffuse Interstellar Bands

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Mots-clés : astronomie, astrophysique, infrarouge, interstellaire, molécules

Abstract

We propose a study of interstellar molecules with near-infrared (NIR) high-resolution spectroscopy as a science case for the 3.6-m Devasthal Optical Telescope (DOT). In particular, we present the results obtained on-going survey of diffuse interstellar bands (DIBs) in NIR with the newly developed NIR high-resolution spectrograph WINERED, which offers a high sensitivity in the wavelength range of 0.91-1.36 µm. Using the WINERED spectrograph attached to the 1.3-m Araki telescope in Japan, we obtained high-quality spectra of a number of early-type stars in various environments, such as diffuse interstellar clouds, dark clouds and star-forming regions, to investigate the properties of NIR DIBs and constrain their carriers. As a result, we successfully identified about 50 new NIR DIBs, where only five fairly strong DIBs had been identified previously. Also, some properties of DIBs in the NIR are discussed to constrain the carriers of DIBs.

Keywords : astronomy, astrophysics, infrared, interstellar, molecules

To cite this article

Satoshi Hamano, Naoto Kobayashi, Hideyo Kawakita, Yuji Ikeda, Sohei Kondo, Hiroaki Sameshima, Akira Arai, Noriyuki Matsunaga, Chikako Yasui, Misaki Mizumoto, Kei Fukue, Natsuko Izumi, Shogo Otsubo & Keiichi Takenaka, «A Survey of Near-infrared Diffuse Interstellar Bands», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 87 - Année 2018, Actes de colloques, First Belgo-Indian Network for Astronomy & Astrophysics (BINA) workshop - November 2016 - Nainital, India, 276 - 280 URL : https://popups.uliege.be/0037-9565/index.php?id=7702.

About: Satoshi Hamano

Laboratory of Infrared High-resolution Spectroscopy, Kyoto Sangyo University, hamano@cc.kyoto-su.ac.jp

About: Naoto Kobayashi

Kiso Observatory, Institute of Astronomy, School of Science, The University of Tokyo

About: Hideyo Kawakita

Laboratory of Infrared High-resolution Spectroscopy, Kyoto Sangyo University

About: Yuji Ikeda

Photocoding

About: Sohei Kondo

Laboratory of Infrared High-resolution Spectroscopy, Kyoto Sangyo University

About: Hiroaki Sameshima

Laboratory of Infrared High-resolution Spectroscopy, Kyoto Sangyo University

About: Akira Arai

Laboratory of Infrared High-resolution Spectroscopy, Kyoto Sangyo University

About: Noriyuki Matsunaga

Kiso Observatory, Institute of Astronomy, School of Science, The University of Tokyo

About: Chikako Yasui

National Astronomical Observatory of Japan

About: Misaki Mizumoto

Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency and Department of Astronomy, Graduate School of Science, University of Tokyo

About: Kei Fukue

Laboratory of Infrared High-resolution Spectroscopy, Kyoto Sangyo University

About: Natsuko Izumi

National Astronomical Observatory of Japan

About: Shogo Otsubo

Laboratory of Infrared High-resolution Spectroscopy, Kyoto Sangyo University

About: Keiichi Takenaka

Laboratory of Infrared High-resolution Spectroscopy, Kyoto Sangyo University