The distribution of far-infrared light in the 'Dusty Hand' galaxy NGC 2146

Details The distribution of far-infrared light in the 'Dusty Hand' galaxy NGC 2146 The distribution of far-infrared light in the 'Dusty Hand' galaxy NGC 2146

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...442..610s&link_type=abstract

Astrophysical Journal (ISSN 0004-637X), vol. 442, no. 2, Part 1, p. 610-617

Astronomy and Astrophysics

Astronomy

8

Cosmic Dust, Far Infrared Radiation, Galactic Radiation, Infrared Astronomy, Interstellar Extinction, Luminous Intensity, Astronomical Spectroscopy, Data Reduction, Galactic Structure, Kuiper Airborne Observatory, O Stars

Scientific paper

The Kuiper Airborne Observatory (KAO) has been used to obtain high spatial resolution 50 and 100 micrometers observations of the peculiar galaxy NGC 2146. We find that the far-infrared luminosity of NGC 2146 arises in a 21 arcsecs x less than or = 16 arcsecs (1.5 kpc x less than or equal 1.1 kpc) region (FWHM) elongated along the major axis. This limit is consistent with the size of the central radio continuum and (12)CO (1-0) sources. The far-infrared distribution is slightly more compact than that of the H-alpha; this difference is consistent with observed pattern of extinction in this galaxy. From a study of the energetics in this galaxy, we conclude that young massive stars are largely responsible for powering the far-infrared luminosity of NGC 2146. The far-infrared and CO (1-0) distributions differ from the reddening morphology as seen in optical images and in the Br-gamma/H-alpha ratio. The starlight and the ionized gas appear most highly reddened at the prominent dust lane 15 arcsecs to the west of the nucleus, while the CO and far-infrared emission peak near the nucleus. This result dust lane lies in front of the main body of the galaxy.

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