The Luminosity-Temperature Relation at z=0.4 for Clusters of galaxies

Details The Luminosity-Temperature Relation at z=0.4 for Clusters of galaxies The Luminosity-Temperature Relation at z=0.4 for Clusters of galaxies

1997-03-06

arxiv.org/abs/astro-ph/9703039v2

Astrophys.J. 482 (1997) L13

Astronomy and Astrophysics

Astrophysics

15 pages Latex (inc table), 3 figures. Accepted for publication in ApJ Letters. Revised luminosities and some temperatures in

Scientific paper

10.1086/310676

We have obtained the first large sample of accurate temperatures for clusters at z>0.14 from ASCA. We compare the luminosity temperature (L-T) distribution for these clusters with the low redshift sample of David et al (1993) and find that there is no evidence for evolution. We also find that the intrinsic variance in this relation is roughly constant with redshift. Additionally, there is no detectable change in the relationship of optical velocity dispersion to X-ray temperature with redshift. Most cosmological simulations driven primarily by gravity predict substantial changes in the L-T relation due to the recent rapid growth of clusters. Our results are consistent either with models in which the cluster core entropy is dominated by pre-heating, or with low Omega models in which cluster structure does not evolve strongly with time. The intrinsic variance in the L-T relation at a fixed redshift can be due a variety of possibilites e.g. a change in the baryonic fraction from cluster to cluster, variation in the fraction of the total energy in the system arising from shocks or supernova heating or variations in the emission measure distributions in multiphase gas.

Affiliated with

Also associated with

No associations

Rating

The Luminosity-Temperature Relation at z=0.4 for 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 at z=0.4 for 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 at z=0.4 for Clusters of galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-451443