Power-law Relations between Warm and Cold Dust Emission Intensities within the Galaxies of M81 and M101 Obtained with AKARI Far-Infrared Surveyor (FIS)

Details Power-law Relations between Warm and Cold Dust Emission Intensities within the Galaxies of M81 and M101 Obtained with AKARI Far-Infrared Surveyor (FIS) Power-law Relations between Warm and Cold Dust Emission Intensities within the Galaxies of M81 and M101 Obtained with AKARI Far-Infrared Surveyor (FIS)

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..418..487s&link_type=abstract

AKARI, a Light to Illuminate the Misty Universe ASP Conference Series, Vol. 418, proceedings of a conference held 16-19 February

Astronomy and Astrophysics

Astronomy

Scientific paper

We investigate the relation between the surface densities of the gas and stars in various regions in the disks of M101 and M81 to investigate the Kennicutt-Schmidt law. The galaxies were observed with the Far-Infrared Surveyor (FIS) onboard AKARI at central wavelengths of 65, 90, 140 and 160 μm. The spectral energy distribution of the whole galaxies shows the presence of a cold dust component in addition to a warm dust component. The cold and warm dust components can be related to the gas mass and newly-formed stellar mass, respectively, whose relation in various regions shows a power-law correlation. There are significant differences in the power-law index between outer arms with four giant HII regions and inner arms in M101, while the power-law index for spiral arms of M81 is similar to that for inner arms in M101.

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