The standard Λ Cold Dark Matter (ΛCDM) cosmological model provides a good description
of a wide range of astrophysical and cosmological data. However, there are a few big open …

A new branch of equilibrium solutions for stationary accretion disks around black holes is
found. These solutions correspond to moderately super-Eddington accretion rates. The …

Cancer metastasis is a major clinical problem that contributes to unsuccessful therapy.
Augmenting evidence indicates that metastasizing cancer cells employ several mechanisms that …

… b) Comptonization In this case the classical description is not self-consistent and … ultraviolet
data; model B instead extends through to soft X-rays and produces the steep observed soft X-…

Aims. Although broad emission lines are the most reliable signature of the nuclear activity of
a galaxy and the location of the emitting material is well measured by the reverberation …

… The gas and radiation pressure are given by P gas = k B /m p ρT and P rad = 4/3σT 4 , whereτ
is the optical depth, Σ = ρH is the gas column density, c, k B, and σ are physical constants, …

The spectra of quasars and NLS1 galaxies show surprising similarity in their spectral shape.
They seem to scale only with the accretion rate. This is in contradiction with the simple …

… , or might imply that in other sources the effect of winds and/or magnetic field changes the
regular outbursts into semi-regular periods of enhanced variability Janiuk and Czerny [42]. …

We investigate the model of the disc/corona accretion flow around the black hole. The model,
parameterized by the total (ie disk plus corona) accretion rate, $\dot m$, mass of the black …

The physical origin of the broad line region in active galactic nuclei is still unclear despite
many years of observational studies. The reason is that the region is unresolved, and the …