CO excitation and H2 masses of infrared-luminous galaxies

Details CO excitation and H2 masses of infrared-luminous galaxies CO excitation and H2 masses of infrared-luminous galaxies

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...368l..15r&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 368, Feb. 10, 1991, p. L15-L18.

Astronomy and Astrophysics

Astronomy

110

Carbon Monoxide, Galactic Radiation, Gas Density, Hydrogen, Infrared Sources (Astronomy), Interstellar Gas, Molecular Clouds, Molecular Excitation, Brightness Temperature, Density Measurement, Mass To Light Ratios, Milky Way Galaxy, Quasars

Scientific paper

The CO(2-1) and CO(1-0) emission from four infrared-luminous galaxies, Arp 193, Arp 220, Mrk 231, and VII Zw 31, was mapped with the IRAM 30 m telescope. These maps show the molecular gas is concentrated in the central regions. The CO(2-1)/CO(1-0) brightness temperature ratio for these galaxies is low, 0.6-0.75, indicating the CO is subthermally excited in regions of moderate H2 density, roughly 400/cu cm. The intrinsic CO(1-0) brightness temperatures are inferred to be between 6 and 13 K, even if the gas kinetic temperatures are much higher. For these galaxies, the H2 mass-to-CO luminosity ratio is similar to that measured for giant molecular clouds in the Milky Way molecular ring.

Affiliated with

Also associated with

No associations

Rating

CO excitation and H2 masses of infrared-luminous galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with CO excitation and H2 masses of infrared-luminous galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and CO excitation and H2 masses of infrared-luminous galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1316126