Seminar: Jonathan Katz, Washington University

Date: 
Tue, 21/08/201212:30-13:30
Location: 
Seminar room
Title: AGN Scaling:
Abstract
It is an attempt to scale models
(dimensional only, not detailed) of accretion discs from AGN to
X-ray binaries to SGR (not disc geometry, but related physics) to GRB.
One conclusion is that a general model of particle acceleration in AGN
is not possible because it is very sensitive to even a very small flux
of soft photons (i.e., from warm gas) that downscatter energetic
electrons: an erg of soft photons is effective in inverse proportion
to the square of the photon energy---no hope of ever modeling to that
level of detail. Several different regimes in these objects---no simple scaling.