50 citations · 97 across the 8 of their papers we have counts for
8 papers
On the appearance of non-local MRI in Keplerian accretion discs
Nikolay Shakura, Konstantin Postnov, Dmitry Kolesnikov +1
We revisit the modal analysis of small perturbations in Keplerian ideal gas flows leading to magneto-rotational instability (MRI) using the non-local approach. We consider the case…
Peculiar X-ray transient SRGA J043520.9+552226/AT2019wey discovered with SRG/ART-XC
I. A. Mereminskiy, A. V. Dodin, A. A. Lutovinov +24
Context: During the ongoing all-sky survey, the Mikhail Pavlinsky ART-XC telescope on board the SRG observatory should discover new X-ray sources, many of which can be transient. H…
Logarithmic potential for the gravitational field of Schwarzschild black holes
Nikolay I. Shakura, Galina V. Lipunova
Approximate gravitational potentials are often used to describe analytically the motion of particles near black holes (BHs), as well as to study the structure of an accretion disk.…
Wind Accretion - Observations Vs Theory
N. Shakura, K. Postnov
The theory of quasi-spherical subsonic accretion onto magnetized rotating neutron star is reviewed. Different regimes of quasi-spherical accretion onto a neutron star: supersonic (…
Origin of bright flares in SFXTs
K. Postnov, N. Shakura, L. Sidoli +1
In the settling accretion theory, which is applicable to quasi-spherical accreting slowly rotating magnetized neutron stars with X-ray luminosity ~erg/…
Variable neutron star free precession in Hercules X-1 from evolution of RXTE X-ray pulse profiles with phase of the 35-day cycle
K. Postnov, N. Shakura, . R. Staubert +3
Accretion of matter onto the surface of a freely precessing NS with a complex non-dipole magnetic field can explain the change of X-ray pulse profiles of Her X-1 observed by RXTE w…