Weighing black holes with warm absorbers

Details Weighing black holes with warm absorbers Weighing black holes with warm absorbers

2001-09-04

arxiv.org/abs/astro-ph/0109050v1

Mon.Not.Roy.Astron.Soc.329:209,2002

Astronomy and Astrophysics

Astrophysics

13 pages, 6 figures, 7 tables. MNRAS accepted

Scientific paper

10.1046/j.1365-8711.2002.04951.x

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: IC 4329a, MCG-6-30-15, NGC 3516, NGC 4051 and NGC 5548; and one radio-quiet quasar: MR 2251-178. We discuss our result in comparison with other methods. The procedure could also be applied to any other radiatively driven optically thin outflow in which the spectral band covering the major absorption is directly observed.

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