Accretion onto Black Hole : Advection Dominated Flow. K. Hayashida Osaka University. Free Fall & Escape Velocity. E=0 (at Infinite) E=1/2v 2 -GM/r=0 (at r ) v=sqrt(2GM/r) v=Free Fall Velocity=Escape Velocity v=c … r=r g =2GM/c 2 Schwartzshild radius
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One zone approx.
(see Mitsuda et al., 1984)
ADAF (thick or thin)… H/r ~1
L is too low unless ADAF is considered.Optically Thin, Two Temperature ADAF (Model fit to SgrA)
Narayan et al., Theory of Black Hole
Accretion Discs, 1998, p.177
NLS1 CurveSlim Disk Model = Optically Thick ADAF
Mineshige et al., 2000