Limits on thermal conduction in galaxy clusters

Details Limits on thermal conduction in galaxy clusters Limits on thermal conduction in galaxy clusters

2003-03-14

arxiv.org/abs/astro-ph/0303310v1

Astronomy and Astrophysics

Astrophysics

7 pages, 1 figure

Scientific paper

We have calculated lower limits for the global effective thermal conductivity in a sample of 165 Abell clusters. We assumed that cluster X-ray luminosity is compensated by a conductive heat flux which we then compare with an upper limit to the temperature gradient inferred from the cluster temperature and radius. This gives a lower limit to the thermal conductivity and therefore to the relative suppression from the Spitzer conductivity, kappa_{Sp}. Not a single cluster requires super-Spitzer values of thermal conduction to balance the observed X-ray luminosity. The suppression coefficient f=kappa/kappa_{Sp} is clustered in a range 10^{-2} < f < 0.4. A weak dependence of $f$ versus $z$ is observed over $ 0 < z <0.41$. Possible biases and/or selection effects are discussed.

Affiliated with

Also associated with

No associations

Rating

Limits on thermal conduction in 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 Limits on thermal conduction in galaxy clusters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Limits on thermal conduction in galaxy clusters will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-218000