Active Galaxies, Quasars and their Evolution

What is the source of the power of an Active galactic nucleus or Quasar? We look at the Supermassive black holes that create these amazing objects.
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Supermassive black hole: en.wikipedia.org/wiki/Superma...
NGC 4261: en.wikipedia.org/wiki/NGC_4261
Centaurus A: en.wikipedia.org/wiki/Centaur...
Centaurus A: A New Look at an Old Friend: chandra.harvard.edu/photo/2014...
Messier 87: en.wikipedia.org/wiki/Messier_87
Full spectrum of 3C273: isdc.unige.ch/3c273/
Arp 299: en.wikipedia.org/wiki/Arp_299
NuSTAR and Arp 299: www.nustar.caltech.edu/news/n...
M-sigma relation: en.wikipedia.org/wiki/M-sigma...
The 2dF QSO Redshift Survey (2QZ): www.2dfquasar.org/qso_surv.html
0:00 Introduction
0:57 What powers AGNs?
1:32 The Black Hole Paradigm
5:37 Models of Active Galactic Nuclei
6:16 Core of Galaxy NGC 4261 Hubble Space Telescope
8:27 The Central Engine of an Active Galaxy
10:42 Gas Disk in Nucleus of Active Galaxy M87
19:02 X-Rays from Braking Radiation
23:39 How do supermassive black holes form?
24:47 How are supermassive black holes fueled?
25:18 Black holes in Colliding Galaxies Arp 299
26:49 Do most galaxies have supermassive black holes?
27:37 Black Holes in Galaxies
34:08 Black Holes and Galaxy Evolution

[@3dstudiomike]

Thx Jason. You're still the GOAT astronomy prof.

[@sonarbangla8711]

The strong gravitational attraction of the BH ensures nothing gets out, not even light. So, what is the mechanism of the various things that are given out, like Hawking radiation, jets and god knows what else?

[@jason1440]

Would a dead pulsar mimic a stellar mass blackhole?

[@deltalima6703]

The fewer artsts pictures the better. Those were terrible, they didnt even have the recent update from kip thornes movie project.