I summarise evidence and new calculations confirming that the Big Blue Bump is thermal, and that variations are caused by heating. There is however a serious energy budget problem, and various other correlations and non-correlations are inconsistent with this picture. I suggest ways in which some radical thinking aboiut how energy emerges from a black hole may solve this dilemma.
|Title of host publication||Active Galactic Nuclei: from Central Engine to Host Galaxy, meeting held in Meudon, France, July 23-27, 2002|
|Publication status||Published - 2003|