Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...325..450s&link_type=abstract
Astronomy and Astrophysics, v.325, p.450-456
Astronomy and Astrophysics
Astrophysics
28
Galaxies: Individual: Circinus, Infrared: Galaxies, Infrared: Ism: Continuum, Dust, Extinction
Scientific paper
We present infrared and millimeter-wave observations of the Circinus galaxy which is at a distance of only 4 Mpc and provides the closest example of an obscured Seyfert nucleus surrounded by a starburst ring. The FWHM size of the continuum emission is found to be only =~0.3" (6pc) at 3-5μm, =~1.3" at 10μm, <=1.5" at 20μm and <=23" (460pc) at 1.3mm. The 1.3mm measurements also provide an estimate of =~1.6x10^8^Msun_ for the gas mass. It is shown using a radiative transfer code that both the observed sizes and overall spectral energy distribution, including the 9.7μm silicate absorption and 3.28-11.3μm PAH emission features, can be satisfactorily modelled by assuming that the total luminosity is dominated by dust heated by a central power law source.
Freudling Wolfman
Kaeufl Hans Ulrich
Moorwood Alan
Siebenmorgen Ralf
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