426 citations · 3.7k across the 70 of their papers we have counts for
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Event Horizon Telescope observations of the jet launching and collimation in Centaurus A
Michael Janssen, Heino Falcke, Matthias Kadler +236
Very-long-baseline interferometry (VLBI) observations of active galactic nuclei at millimeter wavelengths have the power to reveal the launching and initial collimation region of e…
The multi-phase environment in the centre of Centaurus A
A. Borkar, T. P. Adhikari, A. Różańska +6
We study the multi-phase medium in the vicinity of the active galactic nucleus Centaurus A (Cen A). Combined high-resolution observations with the ALMA and Chandra observatories in…
The variable and non-variable X-ray absorbers in Compton-thin type-II Active Galactic Nuclei
Sibasish Laha, Alex G. Markowitz, Mirko Krumpe +3
We have conducted an extensive X-ray spectral variability study of a sample of 20 Compton-thin type II galaxies using broad band spectra from XMM-Newton, Chandra, and Suzaku. The a…
The physics and astrophysics of X-ray outflows from Active Galactic Nuclei
Sibasish Laha, Randall Smith, Panayiotis Tzanavaris +20
The highly energetic outflows from Active Galactic Nuclei detected in X-rays are one of the most powerful mechanisms by which the central supermassive black hole (SMBH) interacts w…
An X-ray view of central engines of low luminosity quasars (LLQSO) in the local Universe
Sibasish Laha, Ritesh Ghosh, Matteo Guainazzi +1
We have carried out a systematic X-ray spectral analysis of a sample of low luminosity quasars (LLQSO) to investigate the nature of the central engines of these sources. The optica…
First X-ray-Based Statistical Tests for Clumpy-Torus Models: Eclipse Events from 230 Years of Monitoring of Seyfert AGN
Alex Markowitz, Mirko Krumpe, Robert Nikutta
We present an analysis of multi-timescale variability in line-of-sight X-ray absorbing gas as a function of optical classification in a large sample of Seyfert AGN to derive the fi…