Sensitive 144 MHz–1.5 GHz SEDs confirm 12 genuine remnant radio galaxies with short spectral ages (~8–42 Myr) and diverse remnant fractions, revealing a rapidly fading high-z population.
The Dynamics and Energetics of Remnant and Restarting RLAGN
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abstract
In this article, I review past, current, and future advances on the study of radio-loud AGN (RLAGN; radio-loud quasars and radio galaxies) lifecycles exclusively in the remnant and restarting phases. I focus on their dynamics and energetics as inferred from radio observations while discussing their radiative lifetimes, population statistics, and trends in their physical characteristics. I briefly summarize multi-wavelength observations, particularly X-rays, that have enabled studies of the large-scale environments of RLAGN in order to understand their role in feedback. Furthermore, I discuss analytic and numerical simulations that predict key properties of remnant and restarting sources as found in wide-area surveys, and discuss the prospects of future surveys that may shed further light on these elusive subpopulations of RLAGN.
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SuperMIGHTEE : Spectral Ages of Remnant Radio Galaxy Candidates in the XMM-LSS Field
Sensitive 144 MHz–1.5 GHz SEDs confirm 12 genuine remnant radio galaxies with short spectral ages (~8–42 Myr) and diverse remnant fractions, revealing a rapidly fading high-z population.