PoS - Proceedings of Science
Volume 401 - High Energy Astrophysics in Southern Africa 2021 (HEASA2021) - Session: Active Galactic Nuclei
A study of the lobes of the radio galaxy Hydra A using MeerKAT observations
M. Naidoo*, D. Prokhorov, P. Marchegiani, A. Chen, S. Makhathini, P. Serra and E. de Blok
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Pre-published on: May 26, 2022
Published on: May 30, 2022
Abstract
Hydra A is a radio galaxy located at the center of the galaxy cluster Abell 780. It hosts a pair of 100 kpc scale radio lobes that have been inflated by one of the most powerful outbursts known to date. In a previous conference proceedings, we presented images of Hydra A based on a single observational epoch; here, we present the results from the entire observation of Hydra A with MeerKAT from which we identify a new tail-like structure extending from the southern lobe. We found that the spectral index in this region is significantly softer than the spectral index of the outer lobes. By combining our observations with two low-frequency VLA observations, we found the overall spectrum for the outer lobes of Hydra A shows a steepening with increasing frequency. We found that the Kardashev-Pacholczyk model for spectral aging adequately describes the overall spectrum.
DOI: https://doi.org/10.22323/1.401.0017
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