SIMBAD references

2016MNRAS.463.1534B - Mon. Not. R. Astron. Soc., 463, 1534-1542 (2016/December-1)

A M ≳ 3 shock in `El Gordo' cluster and the origin of the radio relic.


Abstract (from CDS):

We present an X-ray and radio study of the famous `El Gordo', a massive and distant (z = 0.87) galaxy cluster. In the deep (340 ks) Chandra observation, the cluster appears with an elongated and cometary morphology, a sign of its current merging state. The GMRT radio observations at 610 MHz confirm the presence of a radio halo which remarkably overlaps the X-ray cluster emission and connects a couple of radio relics. We detect a strong shock (M ~> 3) in the NW periphery of the cluster, co-spatially located with the radio relic. This is the most distant (z = 0.87) and one of the strongest shock detected in a galaxy cluster. This work supports the relic-shock connection and allows to investigate the origin of these radio sources in a uncommon regime of M >= 3. For this particular case we found that shock acceleration from the thermal pool is still a viable possibility.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): radiation mechanisms: non-thermal - shock waves - galaxies: clusters: individual: ACT-CL J0102-4915 - radio continuum: general - X-rays: galaxies: clusters - X-rays: galaxies: clusters

Simbad objects: 10

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