High-resolution CO observations of luminous infrared galaxies with large L(ir)/L(B) ratios - IRAS 10173 + 0828, ZW 049.057, IRAS 17208 - 0014

Details High-resolution CO observations of luminous infrared galaxies with large L(ir)/L(B) ratios - IRAS 10173 + 0828, ZW 049.057, IRAS 17208 - 0014 High-resolution CO observations of luminous infrared galaxies with large L(ir)/L(B) ratios - IRAS 10173 + 0828, ZW 049.057, IRAS 17208 - 0014

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...370..172p&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 370, March 20, 1991, p. 172-175. Research supported by NASA IRAS Extended M

Astronomy and Astrophysics

Astronomy

20

Carbon Monoxide, Galactic Nuclei, Infrared Sources (Astronomy), Emission Spectra, Infrared Astronomy Satellite, Interstellar Matter, Molecular Gases

Scientific paper

The Owens Valley mm-wave interferometer has been used for high-resolution (about 3-7 arcsec) mapping of CO emission in three luminous IRAS galaxies: IRAS 17208 - 0014, 15107 + 0724, and IRAS 10173 + 0828. These galaxies are among the most extreme, in terms of their L(ir)/L(B) ratio, for objects in the IRAS Bright Galaxy Surveys. The CO emission detected in the three galaxies originates from a single region centered on the IRAS emission peak. These observations have shown that these galaxies have similar values for the global L(ir)/M(H2) ratio, for the surface density of molecular gas in their central regions and for the extinction toward the nucleus (above 300 mag). A high L(ir)/L(B) ratio seems to be a good predictor for both a high global L(ir)/M(H2) ratio and very large central H2 surface densities.

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