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Near-Infrared Spectroscopy of the Diffuse Galactic Emission

Published online by Cambridge University Press:  05 March 2015

T. Onaka ,
I. Sakon ,
R. Ohsawa ,
T. I. Mori ,
H. Kaneda ,
M. Tanaka ,
Y. Okada ,
F. Boulanger ,
C. Joblin  and
P. Pilleri
T. Onaka
Affiliation:
Department of Astronomy, The University of Tokyo, Tokyo 113-0033, Japan email: [email protected]
I. Sakon
Affiliation:
Department of Astronomy, The University of Tokyo, Tokyo 113-0033, Japan email: [email protected]
R. Ohsawa
Affiliation:
Department of Astronomy, The University of Tokyo, Tokyo 113-0033, Japan email: [email protected]
T. I. Mori
Affiliation:
Department of Astronomy, The University of Tokyo, Tokyo 113-0033, Japan email: [email protected]
H. Kaneda
Affiliation:
Graduate School of Science, Nagoya University, Aichi 464-8602, Japan
M. Tanaka
Affiliation:
Center for Computational Sciences, University of Tsukuba, Ibaraki 305-8577, Japan
Y. Okada
Affiliation:
I. Physikalisches Institut, Universität zu Köln, 50937 Köln, Germany
F. Boulanger
Affiliation:
Institut d'Astrophysique Spatiale (IAS), UMR 8617, CNRS & Université Paris-Sud 11, Bâtiment 121, 91405 Orsay Cedex, France
C. Joblin
Affiliation:
Université de Toulouse, UPS-OMP, IRAP & CNRS, IRAP, 31028 Toulouse Cedex 4, France
P. Pilleri
Affiliation:
Centre de Astrobiología (INTA-CSIC), 28850 Torrejón de Ardoz, Spain & Observatorio Astronómico Nacional, Apdo. 112, 28803 Alcalá de Henares, Spain
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Abstract

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The near-infrared (NIR) spectral range (2–5 μm) contains a number of interesting features for the study of the interstellar medium. In particular, the aromatic and aliphatic components in carbonaceous dust can be investigated most efficiently with the NIR spectroscopy. We analyze NIR spectra of the diffuse Galactic emission taken with the Infrared Camera onboard AKARI and find that the aliphatic to aromatic emission band ratio decreases toward the ionized gas, which suggests processing of the band carriers in the ionized region.

Keywords

ISM: general(ISM:) dustextinctioninfrared: ISMinfrared: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Highlights H16: Highlights of Astronomy , August 2012 , pp. 703 - 704
Copyright
Copyright © International Astronomical Union 2015 

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