This is not exactly my field, since I'm doing galactic black holes, which are the little siblings of the big ones thought to power AGN ( Active Galactic Nuclei ), but it's an interesting question anyway: Why cannot stars or supernovae power AGN? with as few formulae as possible and only back-of-the-envelope calculations A Quasar Portrait Gallery; Credit J. Bahcall (IAS, Princeton), M. Disney (Univ. Wales), NASA So, let's first summarize what a typical AGN, which also include... read more
