Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aj....107..448a&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 107, no. 2, p. 448-450
Astronomy and Astrophysics
Astrophysics
26
Absorption Spectra, Broadband, Carbon Monoxide, Cooling Flows (Astrophysics), Cosmic X Rays, Emission Spectra, Galactic Clusters, Interstellar Gas, Line Spectra, Molecular Clouds, Molecular Spectra, X Ray Spectra, Absorption Spectroscopy, Astronomical Spectroscopy, Molecular Spectroscopy, X Ray Spectroscopy
Scientific paper
Cooling flows in many rich clusters of galaxies are thought to deposit up to approximately 1000 solar mass/yr into some cool reservoir, and soft x-ray absorption indicates that approximately 1012 solar mass of cool gas is actually present in many cases. Previous searches for such large quantities of atomic and molecular gas have been unsuccessful. In a picture advocated by White et al. (1990), the gas may reside in a Jeans-stable mist of molecular clouds, whose velocities could be virialized in the cluster potential. We have attempted to detect the broad CO emission lines from gas using wide band techniques, and offsetting the sky beam well outside the cooling radius. Our lack of detections requires that the product of the average number of cloudlets in the line of sight and the individual cloudlet line widths be less than 2-3 km/s for molecules at 10 K.
Antonucci Robert
Barvainis Richard
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