Paper:	Weighing black holes with warm absorbers
Volume:	290, Active Galactic Nuclei: from Central Engine to Host Galaxy
Page:	235
Authors:	Morales, R.; Fabian, A. C.
Abstract:	We present a new technique for determining an upper limit for the mass of the black hole in active galactic nuclei showing warm absorption features. The method relies on the balance of radiative and gravitational forces acting on outflowing warm absorber clouds.It has been applied to 6 objects: five Seyfert 1 galaxies: IC4329a, MCG-6-30-15, NGC 3516, NGC 4051 and NGC 5548; and oneradio-quiet quasar: MR 2251-178. We discuss our result incomparison with other methods. The procedure could also be applied to any other radiatively driven optically thin outflow inwhich the spectral band covering the major absorption is directlyobserved.

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