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Spectral Index of the Filaments in the Abell 523 Radio Halo

Journal
Date Issued
2021
Author(s)
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Perley, Richard A.
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Giovannini, Gabriele
DOI
Abstract
The galaxy cluster Abell 523 hosts a radio halo characterized by the presence of two filaments transversely located with respect to the cluster merger axis. In this paper, we present a spectral index image of these filaments between 1.410 and 1.782 GHz obtained with Jansky Very Large Array observations. We find a steepening of the spectral index of the filaments at frequencies 1.4 GHz and an indication that bright patches are characterized by flat spectral indices. Our results are consistent with a scenario of highly-efficient turbulence induced by merger phenomena.
Volume
9
Issue
4
Start page
112
Uri
Url
Issn Identifier
2075-4434
Ads BibCode
2021Galax...9..112V
Rights
open.access