271 citations · 4.6k across the 192 of their papers we have counts for
4 papers · 2 filters
Radiation pressure instability driven variability in the accreting black holes
Agnieszka Janiuk, Bozena Czerny, Aneta Siemiginowska
The time dependent evolution of the accretion disk around black hole is computed. The classical description of the -viscosity is adopted so the evolution is driven by the instab…
Chandra Survey of Radio-quiet, High-redshift Quasars
Jill Bechtold, Aneta Siemiginowska, Joseph Shields +6
We observed 17 optically-selected, radio-quiet high-redshift quasars with the Chandra Observatory ACIS, and detected 16 of them. The quasars have redshift between 3.70 and 6.28 and…
The role of the central stellar cluster in active galactic nuclei. I. Semi-analytical model
E. Y. Vilkoviskij, B. Czerny
The subject of the paper is the role of the massive stellar cluster in the activity phenomenon and in the structure of active galactic nuclei. We introduce a simple model of stella…
The structure and radiation spectra of illuminated accretion discs in AGN. I. Moderate illumination
A. Różańska, A. -M. Dumont, B. Czerny +1
We present detailed computations of the vertical structure of an accretion disc illuminated by hard X-ray radiation with the code {\sc titan-noar} suitable for Compton thick media.…