Thanks to our sponsor. M. Aller (UM) R. Bender (Munich) G. Bower (NOAO) A. Dressler (OCIW) S. Faber (UCSC) A. Filippenko (UCB) K. Gebhardt (Texas) R.Green (NOAO) L. Ho (OCIW). T. Lauer (NOAO) J. Kormendy (Texas) J. Magorrian (C U) J. Pinkney (Michigan) D. Richstone (Mich)
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M. Aller (UM)
R. Bender (Munich)
G. Bower (NOAO)
A. Dressler (OCIW)
S. Faber (UCSC)
A. Filippenko (UCB)
K. Gebhardt (Texas)
L. Ho (OCIW)
vcirc = aGM/r
a depends on the orbit
The current demographic picture
- 2.5x105 Msun/Mpc³ for h=.65 (Yu & Tremaine)
- 4.8x105h² Msun/Mpc³ (Aller & Richstone)
- 6 – 9x105 (Fabian & Iwasawa) qso+X-ray background (and similar from Barger).
The X-ray background energy exceeds the available sources of energy in known supermassive black holes.
(the known population of SBH seems just adequate for the quasar energy).