ISOPHOT Maps of NGC 6946 in the range λ 60-200μm.

Details ISOPHOT Maps of NGC 6946 in the range λ 60-200μm. ISOPHOT Maps of NGC 6946 in the range λ 60-200μm.

Nov 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...315l.149t&link_type=abstract

Astronomy and Astrophysics, v.315, p.L149-L152

Astronomy and Astrophysics

Astrophysics

24

Galaxies, Star Formation, Dust

Scientific paper

We present maps of NGC 6946 at λ 61 and 205μm as well as scans through the galaxy at these and at 8 intermediate wavelengths. The bulk of the FIR luminosity arises from a diffuse disk component which extends beyond the 25mag/arcsec^2^ B isophote to at least the radius corresponding to the sensitivity limit. A FIR emission counterpart to the outlying HI disk is seen at both 61 and 205μm, for which a dust to HI mass ratio of 0.0046 is inferred from the 205μm brightness assuming a dust temperature of 15K. The disk scale length at both λ 61 and 205μm is similar to that seen in R-band.

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