Le 13/01/11 19:18, jacob navia a écrit :
Le 12/01/11 23:39, jacob navia a écrit :

[Mod. note: I think you may have your efficiency factors the wrong way
round. Accretion efficiency factors of 10% -- which are an order of
magnitude estimate, not a number fixed by physics -- usually mean that
10% of the mass-energy is radiated, not that only 10% of the mass
makes it in. There are real problems in understanding black hole
growth, but it's not necessary to exaggerate the problem by an order
of magnitude -- mjh]

You are right. I misunderstood
Accretion, black holes, AGN and all that.....
Andrew King Theoretical Astrophysics Group, University of Leicester, UK
http://www.exp-astro.phys.ethz.ch/se...tures_King.pdf

I was mislead by page 62 of that document where he speaks about 10%
efficiency.

Question then:

What is the maximal black hole accretion rate?
There is a super massive black hole already at 13 billion years, i.e.
only 700 million years after that "bang"...