CO observations of all Virgo Cluster spiral galaxies brighter than B(T) exp 0 = 12

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Carbon Monoxide, Interstellar Matter, Spiral Galaxies, Virgo Galactic Cluster, Astronomical Spectroscopy, Molecular Spectra

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CO J = 1 to 0 spectra at 45 arcsec resolution are presented from over 200 positions along the major axes of 42 Virgo Cluster spiral galaxies, obtained with the 14 m FCRAO telescope. Thirty-eight of these galaxies form a complete, blue magnitude-limited sample. From the major-axis observations, global CO fluxes, radial distributions, diameters, and measures of asymmetry are determined. Thirty-four of these galaxies have been detected in at least one position, and 25 have been detected in three or more positions. In most of these galaxies, the distribution of CO emission is centrally peaked. However, there is one Sb galaxy with a central molecular depression, and one barred galaxy with a possible molecular bar. Two other galaxies exhibit CO asymmetries which may be the result of an ISM-ICM interaction.

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