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A survey of molecular hydrogen in the central galaxies of cooling flows.

Edge, A. C. and Wilman, R. J. and Johnstone, R. M. and Crawford, C. S. and Fabian, A. C. and Allen, S. W. (2002) 'A survey of molecular hydrogen in the central galaxies of cooling flows.', Monthly notices of the Royal Astronomical Society., 337 (1). pp. 49-62.


We present a large sample of H- and K-band spectra of 32 optically line-luminous central cluster galaxies. We find significant rovibrational H2 emission in 23 of these galaxies as well as H recombination and/or [FeII] emission in another five. This represents a fourfold increase in the number of molecular line detections known. A number of the detections are of extended emission (5-20 kpc). In several objects we find significant [SiVI] emission that appears to correlate with the strength of high ionization lines in the optical (e.g. [OIII]). This comprehensive sample builds on previous work and confirms that warm (1000-2500 K) molecular hydrogen is present wherever there is ionized material in the cores of cooling flows and in most cases it also coincides with CO molecular line emission.

Item Type:Article
Keywords:Active galaxies, Clusters, Cooling flows, Galaxies, Elliptical, Lenticular, CD, Infrared.
Full text:(NA) Not Applicable
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Date accepted:No date available
Date deposited:No date available
Date of first online publication:November 2002
Date first made open access:No date available

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