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High frequency radio imaging of 3CR 403.1 with the Sardinia Radio Telescope by Missaglia, Valentina; Murgia, Matteo; Massaro, Francesco; Paggi, Alessandro; Jimenez-Gallardo, Ana; Forman, William R.; Kraft, Ralph P.; Balmaverde, Barbara is a scholarly article available to read on EtoBox.

What is High frequency radio imaging of 3CR 403.1 with the Sardinia Radio Telescope about?

We present multifrequency observations of the radio source 3CR 403.1, a nearby (z=0.055), extended ($\sim$0.5 Mpc) radio galaxy hosted in a small galaxy group. Using new high frequency radio observations from the Sardinia Radio Telescope (SRT), augmented with archival low frequency radio observations, we investigated radio spectral and polarimetric properties of 3CR 403.1. From the MHz-to-GHz spectral analysis, we computed the equipartition magnetic field in the lobes to be B$_{eq}$=2.4~$\mu$G and the age of the source to be $\sim$100 Myr. From the spectral analysis of the diffuse X-ray emission we measured the temperature and density of the intracluster medium (ICM). From the SRT observations, we discovered two regions where the radio flux density is below the background value. We computed the Comptonization parameter both from the radio and from the X-ray observations to test if the Sunyaev-Zel'dovich effect is occurring here and found a significant tension between the two estimates. If the negative signal is considered as real, then we speculate that the discrepancy between the two values could be partially caused by the presence of a non-thermal bath of mildly relativistic ghos

Author

Missaglia, Valentina; Murgia, Matteo; Massaro, Francesco; Paggi, Alessandro; Jimenez-Gallardo, Ana; Forman, William R.; Kraft, Ralph P.; Balmaverde, Barbara

Published

2022

Language

EN