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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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. Radio observations allow us to probe a population of high energy electrons that reside in the lobes. Observations of Hydra A were carried out by the MeerKAT radio telescope. Using these observations we computed the radio flux of the outer lobes at four frequencies and found the spectrum in the MeerKAT frequency range is well described by a steep power law. By combining our observations with two low-frequency VLA observations, we found the overall spectrum to steepen with increasing frequency. We found that the Kardashev-Pacholczyk model for spectral aging adequately describes the overall spectrum.
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