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Durham University

Department of Physics

Staff profile

Publication details for Dr Richard Wilman

Edge, A. C., Wilman, R. J., Johnstone, R. M., Crawford, C. S., Fabian, A. C. & 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): 49-62.

Author(s) from Durham


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.