Molecular cloud content of early-type galaxies. V. CO in elliptical galaxies

Details Molecular cloud content of early-type galaxies. V. CO in elliptical galaxies Molecular cloud content of early-type galaxies. V. CO in elliptical galaxies

Oct 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994stin...9527320w&link_type=abstract

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Astronomy and Astrophysics

Astronomy

Carbon Monoxide, Cosmic Dust, Elliptical Galaxies, Infrared Astronomy, Interstellar Gas, Mass Ratios, Molecular Clouds, Emission Spectra, Far Infrared Radiation, Infrared Astronomy Satellite, Infrared Spectra, Lenticular Bodies

Scientific paper

A survey of CO emission in 29 far-IR selected elliptical galaxies resulted in 16 detections, of which 3 remain tentative. The molecular gas masses range from 2 x 106 solar masses to 1 x 109 solar masses, and appear to be unrelated to the underlying stellar population. This suggests an external origin of the gas. Most of the elliptical galaxies with a molecular gas component have a gas-to-dust mass ratio of about 700, where dust masses are derived from the Infrared Astronomy Satellite (IRAS) fluxes, but some appear to have a ratio as low as 50. A small apparent gas-to-dust mass ratio is also found for some late-type galaxies, and is correlated with a low dust temperature.

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