Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...183.5303w&link_type=abstract
American Astronomical Society, 183rd AAS Meeting, #53.03; Bulletin of the American Astronomical Society, Vol. 25, p.1374
Astronomy and Astrophysics
Astronomy
Scientific paper
In many clusters of galaxies, X-ray observations have established that large quantities of gas are cooling below X-ray emitting temperatures. Determining the final state of this material remains one of the fundamental questions facing the cooling flow scenario. The detection by White et. al (1991) of excess X-ray absorption in a sample of cluster cooling flows may represent one solution to this quandary. These observations imply the presence of 10(11) --10(12) Msun of cold, absorbing material and may represent the first direct evidence for the accumulated cooling material. To assess the impact of this cold material, we have calculated the emergent X-ray properties for a set of models including the photoelectric opacity due to accumulated cold material. These models are steady--state, spherically symmetric, and exhibit inhomogeneous gas distributions with material cooling out of the flow over all radii. Including the opacity due to accumulated cold material reduces the central X-ray surface brightness profile substantially, with decreases between 40%--80% for radii less than 10 kpc. The total X-ray luminosity is decreased by ~ 25% (0.1--10 keV) assuming 100% of the cooling material goes into this cold, X-ray absorbing form. This result implies that derived values for the total cooling rate dot M_X may be underestimated if opacity effects are neglected. In addition, significant amounts of cold, X-ray absorbing material produce steeper deconvolved mass deposition profiles. We find that models with higher mass deposition in the central regions can produce profiles comparable to the dot M(
Sarazin Craig
Wise Mark
No associations
LandOfFree
X-ray Signatures of Cold Gas in Cluster Cooling Cores 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 X-ray Signatures of Cold Gas in Cluster Cooling Cores, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and X-ray Signatures of Cold Gas in Cluster Cooling Cores will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-779122