The interstellar medium in the central 1 kiloparsec of M82

Details The interstellar medium in the central 1 kiloparsec of M82 The interstellar medium in the central 1 kiloparsec of M82

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...311l..51l&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 311, Dec. 15, 1986, p. L51-L56.

Astronomy and Astrophysics

Astrophysics

46

Astronomical Spectroscopy, Emission Spectra, Galactic Structure, Interstellar Matter, Line Spectra, Galactic Nuclei, H Ii Regions, Neutral Gases, Spatial Distribution

Scientific paper

The spatial distribution of the 158 micron forbidden C II emission in the central 1 kiloparsec of the infrared galaxy M82 is discussed, and the detection of two fine-structure lines of forbidden O I and forbidden O III at 146 and 52 microns is reported. Within 500 pc of the nucleus, the far-infrared emission lines contain about 200 million solar luminosities. The neutral gas in the inner disk is in dense, relatively small clouds, thin filaments, or sheets of very low volume filling factor, associated with a lower density ionized medium of moderately high filling factor. Within 500 pc of the nucleus, about 30 million solar masses is contained in H II regions and 30 million solar masses in photodissociation regions. There is a component of ionized and neutral gas near LSR of roughly 150 km/s centered near the compact radio source 41.9 + 58 and elongated along the minor axis of M82. The gas is especially dense in this region and appears to be associated with X-ray emission and the inner H-alpha filaments.

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