3 papers
astro-ph2004
In Search of the Dark Ages -- An Experimental Challenge
J. Bland-Hawthorn, P. E. J. Nulsen
Most direct source detections beyond z~7 are likely to arise from wide-field narrowband surveys of Ly-a emission in the J band. For this to be true, the Ly-a emission must somehow…
astro-ph2003
Interaction of the AGN and X-ray Emitting Gas
Paul Nulsen
The process that prevents the deposition of cooled gas in cooling flows must rely on feedback in order to maintain gas with short cooling times, while preventing the bulk of the ga…
astro-ph2000
New Perspectives on Cooling Flows and Cluster Radio Sources
B. R. McNamara, M. W. Wise, L. P. David +2
We discuss new results from the Chandra X-ray Observatory and XMM-Newton on cluster cooling flows, emphasizing early results from our Chandra programs. We find cooling rates reduce…