491 citations · 5.1k across the 187 of their papers we have counts for
11 papers · 1 filter
Settling accretion on to isolated neutron stars from interstellar medium
S. B. Popov, K. A. Postnov, N. I. Shakura
We apply the model of subsonic settling accretion on to isolated neutron stars accreting from the interstellar medium (AINS). We show that in this regime the expected mean X-ray lu…
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/…
On properties of Velikhov-Chandrasekhar MRI in ideal and non-ideal plasma
N. I. Shakura, K. A. Postnov
Conditions of Velikhov-Chandrasekhar magneto-rotational instability in ideal and non-ideal plasmas are examined. Linear WKB analysis of hydromagnetic axially symmetric flows shows…
Long-term change in the cyclotron line energy in Hercules X-1
R. Staubert, D. Klochkov, J. Wilms +5
Aims. We investigate the long-term evolution of the Cyclotron Resonance Scattering Feature (CRSF) in the spectrum of the binary X-ray pulsar Her X-1 and present evidence of a true…
Pulsar timing constraints on narrow-band stochastic signals
Konstantin A. Postnov, Nataliya K. Porayko
We consider the sensitivity of the pulsar timing array (PTA) technique to specific kind of narrow-band stochastic signals in nano-Hz frequency range. Specifically, we examine the n…
Spin-up/spin-down of neutron star in Be-X-ray binary system GX 304-1
K. A. Postnov, A. I. Mironov, A. A. Lutovinov +3
We analyze spin-up/spin-down of the neutron star in Be X-ray binary system GX\,304-1 observed by \textit{Swift}/XRT and \textit{Fermi}/GBM instruments in the period of the source a…