منابع مشابه
Weighing black holes with warm absorbers
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−6-3015, NGC 3516, NGC 4051 and NGC 5548; and one radio-quiet ...
متن کاملWeighing black holes in radio-loud AGNs
Because of the contamination of jets, using the size – continuum luminosity relation can overestimate the broad line region (BLR) size and black hole mass for radio-loud AGNs. We propose a new relation between the BLR size and Hβ emission line luminosity and present evidences for using it to get more accurate black hole masses of radio-loud AGNs. For extreme radio-loud AGNs such as blazars with...
متن کاملImpedance-matched absorbers and optical pseudo black holes
H. Odabasi,* F. L. Teixeira, and W. C. Chew ElectroScience Laboratory and Department of Electrical and Computer Engineering, The Ohio State University, Columbus, Ohio 43210, USA Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road,...
متن کاملWeighing Black Holes in High - Redshift SCUBA Galaxies
Deep SCUBA surveys have uncovered a population of dust-enshrouded star-forming galaxies at z ≈ 2. Using the ultra-deep 2 Ms Chandra Deep Field-North survey we recently showed that a large fraction of these systems are also undergoing intense black-hole growth. Here we provide further constraints on the properties of the black holes in SCUBA galaxies using the virial black-hole mass estimator. W...
متن کاملBlack Holes: Scatterers, Absorbers and Emitters of Particles
Accurate and powerful computational methods developped by the author, based on the analytic resolution of the wave equation in the black hole background, allow to obtain the highly non trivial total absorption spectrum of the Black Hole. As well as phase shifts and cross sections (elastic and inelastic) for a wide range of energy and angular momentum, the angular distribution of absorbed and sc...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2002
ISSN: 0035-8711,1365-2966
DOI: 10.1046/j.1365-8711.2002.04951.x