A spatially-resolved spectral analysis of giant radio galaxies with MeerKAT

• DOI: 10.48550/arxiv.2411.06813
• Publication Date: 2024-11-11
• Authors: Kate Charlton; J. Delhaize; K. Thorat; Ian Heywood; M. J. Jarvis; M. J. Hardcastle; Fang Xia An; I. Delvecchio; C. L. Hale; I. H. Whittam; M. Brüggen; L. Marchetti; L. K. Morabito; Zara Randriamanakoto; S. V. White; A. R. Taylor
• Keywords: Spectral Analysis

In this study we report spatially resolved, wideband spectral properties of three giant radio galaxies (GRGs) in the COSMOS field: MGTC J095959.63+024608.6 , J100016.84+015133.0 and J100022.85+031520.4. One such galaxy J100022.85+031520.4 is reported here for first time with a projected linear size 1.29 Mpc at redshift 0.1034. Unlike other two, it associated brightest cluster (BCG), making one few GRGs known to inhabit environments. We examine age distributions using new MeerKAT UHF-band (544-1088 MHz) observations, $L$-band (900-1670 data from International GHz Tiered Extragalactic Exploration (MIGHTEE) survey. test two different models ageing, Jaffe-Perola Tribble models, Broadband Radio Astronomy Tools (\textsc{brats}) software which find agree well each other. estimate as 68 Myr, 47 Myr 67 Myr. significant disagreements between these estimates dynamical ages GRGs, modelled group Our results highlight need additional processes are not accounted either dynamic or estimations.