15 papers · 1 filter
Outflows and winds in AGNs: a case for Simbol-X
M. Cappi, F. Tombesi, M. Giustini
Chandra and XMM-Newton X-ray observations are accumulating evidence for massive, high velocity outflows in Seyfert galaxies and quasars, most likely originating very close to the c…
The Realm of the First Quasars in the Universe: the X-ray View
C. Vignali, W. N. Brandt, O. Shemmer +3
We review the X-ray studies of the highest redshift quasars, focusing on the results obtained with Chandra and XMM-Newton. Overall, the X-ray and broad-band properties of z>4 quasa…
The obscured quasar population from optical, mid-infrared, and X-ray surveys
C. Vignali, A. Comastri, D. M. Alexander
Over the last few years, optical, mid-infrared and X-ray surveys have brought to light a significant number of candidate obscured AGN and, among them, many Type 2 quasars, the long…
Constraining global parameters of accreting black holes by modeling magnetic flares
R. W. Goosmann, M. Mouchet, M. Dovciak +3
We present modeling results for the reprocessed radiation expected from magnetic flares above AGN accretion disks. Relativistic corrections for the orbital motion of the flare and…
Modeling the X-ray fractional variability spectrum of Active Galactic Nuclei using multiple flares
R. W. Goosmann, M. Dovciak, V. Karas +3
Using Monte-Carlo simulations of X-ray flare distributions across the accretion disk of active galactic nuclei (AGN), we obtain modeling results for the energy-dependent fractional…
A detailed study of the nuclear region of Mrk 273
M. Bondi, D. Dallacasa, M. A. Peerez Torres +1
We present 5 GHz EVN+MERLIN observations of the nuclear region of the ultra luminous infrared galaxy Mrk 273. These observations confirms the detection, on the mas scale, of two re…