Tracing the evolution in the iron content of the ICM

Details Tracing the evolution in the iron content of the ICM Tracing the evolution in the iron content of the ICM

2006-10-31

arxiv.org/abs/astro-ph/0610940v1

Astronomy and Astrophysics

Astrophysics

6 pages, 6 figures, to appear in the Proceedings of "Heating vs. Cooling in Galaxies and Clusters of Galaxies", August 2006, G

Scientific paper

We present a Chandra analysis of the X-ray spectra of 56 clusters of galaxies at z>0.3, which cover a temperature range of 3>kT>15 keV. Our analysis is aimed at measuring the iron abundance in the ICM out to the highest redshift probed to date. We find that the emission-weighted iron abundance measured within (0.15-0.3)R_vir in clusters below 5 keV is, on average, a factor of ~2 higher than in hotter clusters, following Z(T)~0.88T^-(0.47)Z_o, which confirms the trend seen in local samples. We made use of combined spectral analysis performed over five redshift bins at 0.3>z>1.3 to estimate the average emission weighted iron abundance. We find a constant average iron abundance Z_Fe~0.25Z_o as a function of redshift, but only for clusters at z>0.5. The emission-weighted iron abundance is significantly higher (Z_Fe~0.4Z_o) in the redshift range z~0.3-0.5, approaching the value measured locally in the inner 0.15R_vir radii for a mix of cool-core and non cool-core clusters in the redshift range 0.1

Affiliated with

Also associated with

No associations

Rating

Tracing the evolution in the iron content of the ICM 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 Tracing the evolution in the iron content of the ICM, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tracing the evolution in the iron content of the ICM will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-46512