AKARI far-infrared observations of the ISM in nearby galaxies

H. Kaneda1*, T. Suzuki2, M. Yamagishi1, T. Onaka3, D. Ishihara1, I. Sakon3, T. Shimonishi3 and I. Takase3
1Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan
2Advanced Technology Center, National Astronomical Observatory of Japan, Tokyo 181-8588, Japan
3Graduate School of Science, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan

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Abstract

Far-infrared (FIR) properties of 57 nearby galaxies are studied using the Far-Infrared Surveyor (FIS) on AKARI. Among them, this paper focuses on the results obtained for the three famous nearby edge-on galaxies, NGC 3079, M82, and NGC253, which show prominent galactic superwinds in the X-ray and Hα. These galaxies exhibit very bright nuclei in the FIR due to starburst activity. We have spatially resolved the central regions of these galaxies, among which we have detected FIR dust emission in the haloes of M 82 and NGC 253. We discuss similarities and differences in the FIR properties among the three galaxies.

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Keywords : galaxies: halos - galaxies: individual(M 82, NGC 253, NGC 3079) -galaxies: starburst - infrared: galaxies - ISM: dust, extinction