58 citations · 234 across the 27 of their papers we have counts for
6 papers · 1 filter
X-ray Variability of AGN and the Flare Model
R. W. Goosmann, B. Czerny, A. -M. Dumont +2
Short-term variability of X-ray continuum spectra has been reported for several Active Galactic Nuclei. Significant X-ray flux variations are observed within time scales down to 10…
Flare-induced fountains and buried flares in AGN
B. Czerny, R. Goosmann
We discuss the local physical changes at the surface of an AGN accretion disk after the onset of a magnetic flare. The X-ray irradiation by a flare creates a hot spot at the disk s…
The semijoin algebra and the guarded fragment
Dirk Leinders, Jerzy Tyszkiewicz, Jan Van den Bussche
The semijoin algebra is the variant of the relational algebra obtained by replacing the join operator by the semijoin operator. We discuss some interesting connections between the…
Type Ia Supernova Explosion: Gravitationally Confined Detonation
Tomasz Plewa, Alan Calder, Don Lamb
We present a new mechanism for Type Ia supernova explosions in massive white dwarfs. The proposed scenario follows from relaxing the assumption of symmetry in the model and involve…
Breaking the mass / anisotropy degeneracy in the Coma cluster
Gary A. Mamon, Ewa L. Lokas, Teresa Sanchis
We provide the first direct lifting of the mass/anisotropy degeneracy for a cluster of galaxies, by jointly fitting the line of sight velocity dispersion and kurtosis profiles of t…
Extinction due to amorphous carbon grains in red quasars from the SDSS
B. Czerny, J. Li, Z. Loska +1
We construct a quasar extinction curve based on the blue and red composite quasar spectra of Richards et al. (2003) prepared from the SDSS survey. This extinction curve does not sh…