The SZ Effect Signature of Excess Entropy in Distant Galaxy Clusters

Details The SZ Effect Signature of Excess Entropy in Distant Galaxy Clusters The SZ Effect Signature of Excess Entropy in Distant Galaxy Clusters

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...201.5806m&link_type=abstract

American Astronomical Society, 201st AAS Meeting, #58.06; Bulletin of the American Astronomical Society, Vol. 34, p.1208

Astronomy and Astrophysics

Astronomy

Scientific paper

X-ray observations of an ``entropy floor'' in nearby groups and clusters of galaxies offer strong evidence that important non-gravitational processes, such as radiative cooling and/or ``preheating'', have significantly influenced the evolution of the intracluster medium (ICM). For the first time, we use the Sunyaev-Zeldovich (SZ) effect to test this hypothesis and estimate the level of the entropy floor in galaxy clusters. A detailed comparison of a number of predicted SZ effect scaling relations with the largest compilation of high redshift SZ effect observational data to date indicates that the presence of an entropy floor is favored by the SZ effect data and that the inferred level of the floor (K0 > 300 keV cm2) is comparable to that found in studies of X-ray scaling relations of nearby massive clusters (which also require K0 > 300 keV cm2). In addition, we find no evidence for evolution of the entropy floor level out to z ~ 0.7. I. G. M. is supported by a postgraduate scholarship from the Natural Sciences and Engineering Research Council of Canada (NSERC).

Affiliated with

Also associated with

No associations

Rating

The SZ Effect Signature of Excess Entropy in Distant Galaxy Clusters 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 The SZ Effect Signature of Excess Entropy in Distant Galaxy Clusters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The SZ Effect Signature of Excess Entropy in Distant Galaxy Clusters will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1890388