Invited Talk

Near-Infrared Spectroscopy of the Diffuse Galactic Emission

¹Takashi Onaka, ¹Itsuki Sakon, ¹Takashi Shimonishi, ¹Ryou Ohsawa, ¹Tamami Mori, ²Yoko Okada, ³Masahiro Tanaka, ⁴Hidehiro Kaneda (¹University of Tokyo, ²University of Cologne, ³Tsukuba University, ⁴Nagoya University)

The near-infrared (NIR) spectral range (2-5 micron) contains several interesting interstellar features. Aromatic and aliphatic C-H bands appear at 3.3-3.5 micron. H₂O, CO₂, and CO ice bands are seen at 3, 4.3, and 4.7 micron. Molecular hydrogen has a number of transitions in this spectral range and CO gas has the v=1-0 bands around 4.7 micron. In addition there are hydrogen and helium recombination lines that are seen towards ionized gas. However, this spectral range has been scarcely explored due to the lack of sensitive instruments until recently. The Infrared Camera (IRC) on board AKARI has changed the situation drastically and its NIR spectroscopic capability provides the first opportunity to investigate the NIR interstellar features in various objects in detail. In this presentation, we discuss the NIR spectral features in various objects, including the diffuse Galactic emission, based on the observations with the IRC.

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Invited Talk

Near-Infrared Spectroscopy of the Diffuse Galactic Emission

1Takashi Onaka, 1Itsuki Sakon, 1Takashi Shimonishi, 1Ryou Ohsawa, 1Tamami Mori, 2Yoko Okada, 3Masahiro Tanaka, 4Hidehiro Kaneda (1University of Tokyo, 2University of Cologne, 3Tsukuba University, 4Nagoya University)

¹Takashi Onaka, ¹Itsuki Sakon, ¹Takashi Shimonishi, ¹Ryou Ohsawa, ¹Tamami Mori, ²Yoko Okada, ³Masahiro Tanaka, ⁴Hidehiro Kaneda (¹University of Tokyo, ²University of Cologne, ³Tsukuba University, ⁴Nagoya University)