Cooling Flows and Heating Shocks in Hercules A

Details Cooling Flows and Heating Shocks in Hercules A Cooling Flows and Heating Shocks in Hercules A

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20514508h&link_type=abstract

American Astronomical Society Meeting 205, #145.08; Bulletin of the American Astronomical Society, Vol. 36, p.1590

Other

Scientific paper

Hercules A is a radio-bright cooling-flow cluster at z=0.154. A 2001 Chandra observation shows a break in surface brightness about 1' (160 kpc) from the cluster center. This feature is interpreted as a shock in the intracluster medium, powered ultimately by the AGN of the cluster's central galaxy. Using a simple hydrodynamical model, the Mach number of the shock is found to be 1.6. The energy and age of the shock are also calculated from the model, and found to be 3 × 1061 ergs and 6 × 107 years, respectively. The heating efficiency of the shock is found to be of order 1/2, so this energy is sufficient to account for the X-ray luminosity of the cluster if similar shocks occur every 109 years. Other heating sources such as gas mixing and bubble enthalpy are explored within the context of the same model, but are found to be relatively unimportant for Hercules A. Data for the 6 known cooling-flow systems with shocks are gathered and compared.
DCH was supported by NSF REU award #9731923.

Affiliated with

Also associated with

No associations

Rating

Cooling Flows and Heating Shocks in Hercules A does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Cooling Flows and Heating Shocks in Hercules A, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cooling Flows and Heating Shocks in Hercules A will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1644081