Cooling and heating in rotating hot X-ray emitting atmospheres

Observations of massive cooling core clusters and of giant elliptical galaxiesindicate that the cold gas in these systems may be produced chiefly by thermallyunstable cooling from the hot phase. Recently, there have been considerablenumerical efforts to study thermally unstable cooling from the hot into the coldphase. The properties of cooling in the presence of significant angular momentumare, however, likely to be different from cooling in nonrotating atmospheres.Here, we propose a 50 ks observation of NGC 7049, a nearby central group galaxywith a rotating disk of dusty cold gas. We will test predictions for coolinginstabilities in systems with significant angular momentum. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]