| Autor: |
Vacca, Valentina, Govoni, Federica, Perley, Richard A., Murgia, Matteo, Carretti, Ettore, Loi, Francesca, Feretti, Luigina, Giovannini, Gabriele |
| Předmět: |
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| Zdroj: |
Galaxies (2075-4434); Dec2021, Vol. 9 Issue 4, p112-112, 1p |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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