4.7 Article

Chandra observations of Abell 2029:: No cooling flow and a steep abundance gradient

Journal

ASTROPHYSICAL JOURNAL
Volume 573, Issue 1, Pages L13-L17

Publisher

UNIV CHICAGO PRESS
DOI: 10.1086/341990

Keywords

cooling flows; galaxies : abundances; galaxies : clusters : individual (A2029); intergalactic medium; X-rays : galaxies

Ask authors/readers for more resources

We have obtained high spatial resolution temperature and abundance profiles for the galaxy cluster Abell 2029 with the Chandra ACIS-S instrument. Our observations reveal that the spectra are well fitted by a single-phase gas in each annulus. While the temperature of the intracluster medium drops from similar to9 keV at 3' (260 k(70)(-1) pc) to 3 keV in the central 5 (5 k(70)(-1) kpc) of the cluster, there is no evidence of gas emitting at temperatures below 3 keV. The addition of a cooling flow component does not improve the fits, despite previous claims for a massive cooling flow. There is also no evidence of excess absorption above the Galactic N-H-value. We also observe a steep Fe abundance gradient, such that Z(Fe) greater than or similar to 2Z(circle dot) (assuming meteoritic solar Fe abundance) in the core, consistent with significant enrichment from Fe-rich Type Ia supernovae in the cD galaxy. The Fe abundance drops to approximate to0.5 Z(circle dot) at 3' (260 k(70)(-1) pc), in good agreement with previous BeppoSAX measurements. The high-resolution image reveals neither a strong central point source nor any filamentary structure related to a cooling flow or a merger. The absence of a strong merger signature argues against the creation of the wide-angle-tailed radio source morphology in a merger event.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available