Physics
Scientific paper
Dec 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989iaus..135p.331e&link_type=abstract
IAU Symposium No. 135: Interstellar dust: contributed papers, p. 331 - 338
Physics
Spiral Galaxies: Contour Maps, Spiral Galaxies: Morphology, Spiral Galaxies: Infrared Maps, Spiral Galaxies: Surface Brightness
Scientific paper
Dust reemission from the Scd galaxy NGC 6946 has been measured at 100 and 160 μm with the 32-channel University of Chicago Far-Infrared Camera. The authors present fully sampled maps of the nucleus and inner spiral arms at 45″resolution. The 100/160 μm color temperature is correlated with the Hα surface brightness. Assuming the distance from earth to the galaxy is 10.1 Mpc, the authors determine Tc = 32K at the nucleus and at radius 5.4 kpc, where there is a concentration of H II regions. In the intermediate annulus of relatively low Hα surface brightness, the temperature drops to a local minimum of 25K at radius 3 kpc. The ratio of reradiated to transmitted stellar luminosity is ≡3.0 at the nucleus and ≡0.9 for the disk.
Engargiola Greg
Harper Doyal A.
Jaffe Daniel T.
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