Potential Virial AGN Mass Estimators
l
Source
Radius
l
X-ray Fe K
α
3-10
R
s
l
Broad-Line Region
600
R
s
l
Megamasers
4x10
4
R
s
l
Gas Dynamics
8x10
5
R
s
l
Stellar Dynamics
10
6
R
s
l
l
Where Schwarzschild radius
R
s
= 2GM/c
2
= 3x10
13
M
8
cm
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