Astronomy and Astrophysics – Astrophysics
Scientific paper
1997-05-09
Astronomy and Astrophysics
Astrophysics
aastex, 14 pages, 3 postscript figures, accepted for publication in ApJL
Scientific paper
10.1086/310767
We model the effects of shocks on the diffuse, X-ray emitting baryons in clusters of galaxies. Shocks separate the infalling from the inner gas nearly at equilibrium, and dominate the compression and the density gradients of the latter in the dark-matter potential of the cluster. We find that, independently of the detailed shape of the potential, the density gradient is steeper and the compression factor larger for the richer clusters. We show, considering the different merging histories, that in the hierarchical cosmogony the above effects lead, in X-rays, to a luminosity-temperature relation L \propto T^5 at the scale of groups which flattens down to L \propto T^{3} for rich clusters in accord with the observations, and then saturates toward L \propto T^2 for higher temperatures. From the merging histories we also compute statistical fluctuations of the L-T correlation.
Cavaliere Alfonso
Menci Nicola
Tozzi Paolo
No associations
LandOfFree
The Luminosity-Temperature Relation for Groups and Clusters of Galaxies 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 Luminosity-Temperature Relation for Groups and Clusters of Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Luminosity-Temperature Relation for Groups and Clusters of Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-657355