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Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/24887
Title: Relic-Shock Connection in Abell 115
Authors: BOTTEON, ANDREA
GASTALDELLO, FABIO 
BRUNETTI, GIANFRANCO 
Dallacasa, Daniele
Issue Date: 2016
Journal: GALAXIES 
Number: 4
Issue: 4
First Page: 68
Abstract: Giant radio relics are arc-shaped diffuse sources with Mpc-scale found in the peripheries of some dynamically disturbed galaxy clusters. According to the leading scenario of relic formation, shock waves occurring in merger events amplify the local magnetic field and (re)accelerate particles. However, Mach numbers associated with merger shocks are typically low, and hence inefficient at accelerating particles from the thermal pool. We analyzed a deep Chandra observation (334 ks) to study the relic region in the cluster Abell 115. Temperature and surface brightness profiles taken across the relic both show a clear discontinuity, which is consistent with a shock. This result supports the relic–shock connection and represents a test case to study the origin of radio relics. In this particular case, we suggest that a re-acceleration scenario is more suitable. The relic morphology and position are consistent with a shock produced in an off-axis merger between clusters with different masses.
URI: http://hdl.handle.net/20.500.12386/24887
URL: https://www.mdpi.com/2075-4434/4/4/68
ISSN: 2075-4434
DOI: 10.3390/galaxies4040068
Bibcode ADS: 2016Galax...4...68B
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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