Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-08-23
Mon.Not.Roy.Astron.Soc.372:1840-1850,2006
Astronomy and Astrophysics
Astrophysics
12 pages, 4 figures, accepted for publication on MNRAS
Scientific paper
10.1111/j.1365-2966.2006.10977.x
We compare the observed peaked iron abundance profiles for a small sample of groups and clusters with the predictions of a simple model involving the metal ejection from the brightest galaxy and the subsequent diffusion of metals by stochastic gas motions. Extending the analysis of Rebusco et al. (2005) we found that for 5 out of 8 objects in the sample an effective diffusion coefficient of the order of $10^{29}$ cm$^{2}$ s$^{-1}$ is needed. For AWM4, Centaurus and AWM7 the results are different suggesting substantial intermittence in the process of metal spreading across the cluster. There is no obvious dependence of the diffusion coefficient on the mass of the system. We also estimated the characteristic velocities and the spatial scales of the gas motions needed to balance the cooling losses by the dissipation of the same gas motions. A comparison of the derived spatial scales and the sizes of observed radio bubbles inflated in the ICM by a central active galactic nucleus (AGN) suggests that the AGN/ICM interaction makes an important (if not a dominant) contribution to the gas motions in the cluster cores.
Boehringer Hans
Churazov Eugene
Forman William
Rebusco Paola
No associations
LandOfFree
Effect of turbulent diffusion on iron abundance profiles 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 Effect of turbulent diffusion on iron abundance profiles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effect of turbulent diffusion on iron abundance profiles will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-110574