Molecular clouds in galaxies with different Z - Fragmentation of diffuse clouds driven by opacity

Details Molecular clouds in galaxies with different Z - Fragmentation of diffuse clouds driven by opacity Molecular clouds in galaxies with different Z - Fragmentation of diffuse clouds driven by opacity

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pasp...98.1076f&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 98, Oct. 1986, p. 1076-1079.

Astronomy and Astrophysics

Astronomy

64

Interstellar Gas, Molecular Clouds, Spiral Galaxies, Abundance, Carbon Monoxide, Opacity

Scientific paper

Molecular clouds are formed from diffuse interstellar clouds when the external ultraviolet radiation field is prevented from penetrating into the cloud. The opacity is provided mainly by dust grains and the required column density to the cloud center is N ⪆ 5×1020(Z_sun;/Z) cm-2. This high-opacity criterion could have a significant impact on the radial trends observed in spiral galaxies, and on the distinctions between spiral and dwarf irregular galaxies.

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