The Dynamics and Energetics of Remnant and Restarting RLAGN

In this article, I review past, current, and future advances on the study of radio-loud AGN (RLAGN; quasars radio galaxies) lifecycles exclusively in remnant restarting phases. focus their dynamics energetics as inferred from observations while discussing radiative lifetimes, population statistics, trends physical characteristics. briefly summarize multi-wavelength observations, particularly X-rays, that have enabled studies large-scale environments RLAGN order to understand role feedback. Furthermore, discuss analytic numerical simulations predict key properties sources found wide-area surveys, prospects surveys may shed further light these elusive subpopulations RLAGN.