Dense molecular clouds and the ARP 220 starburst

Details Dense molecular clouds and the ARP 220 starburst Dense molecular clouds and the ARP 220 starburst

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...348l..53s&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 348, Jan. 10, 1990, p. L53-L56.

Astronomy and Astrophysics

Astrophysics

80

Carbon Monoxide, Interacting Galaxies, Interstellar Gas, Molecular Clouds, Star Formation, Starburst Galaxies, Interstellar Matter, Luminosity, Milky Way Galaxy, Molecular Gases

Scientific paper

The IRAM 30 m telescope has been used to detect CS(3-2) and (C-13)O(2-1) emission from Arp 220, the prototype infrared luminous galaxy. The CS luminosity of Arp 220 is half the (C-12)O luminosity of the Milky Way. Since CS emission traces gas 100 times denser than that traced by CO emission, Arp 220 contains much more molecular gas at high densities than normal galaxies. It is estimated that there are about 10 to the 10th solar masses of molecular gas at the high densities characteristic of star-forming molecular cloud cores. The existence of these clouds supports a starburst rather than an accretion disk-black hole origin for the 10 to the 12th solar luminosities emitted in the far-infrared.

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