15 citations · 66 across the 9 of their papers we have counts for
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Traces of wobbling accretion disk in X-ray pulsar Her X-1 from observations of the ART-XC telescope of the SRG observatory
V. M. Revnivtsev, K. A. Postnov, S. V. Molkov +5
Long uninterrupted observations of the X-ray binary system Her X-1 were performed with the Mikhail Pavlinsky ART-XC telescope of the Spectrum-Röntgen-Gamma (SRG) X-ray Observatory…
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…
Evidence for neutron star triaxial free precession in Her X-1 from Fermi/GBM pulse period measurements
Dmitry Kolesnikov, Nikolai Shakura, Konstantin Postnov
Her X-1/HZ Her is one of the best studied accreting X-ray pulsars. In addition to the pulsating and orbital periods, the X-ray and optical light curves of the source exhibit an alm…
Physical modeling of viscous disc evolution around magnetized neutron star. Aql X-1 2013 outburst decay
Galina Lipunova, Konstantin Malanchev, Sergey Tsygankov +3
We present a model of a viscously evolving accretion disc around a magnetized neutron star. The model features the varying outer radius of the hot ionized part of the disc due to c…
On the nature of the 35-day cycle in HZ Her/Her X-1
N. I. Shakura, D. A. Kolesnikov, K. A. Postnov
Regular variations of the pulse period of Her X-1 with X-ray flux observed by Fermi-GBM are examined. We argue that these regular variations result from the free precession of the…
Observations of Her X-1 in low states during SRG/eROSITA all-sky survey
N. I. Shakura, D. A. Kolesnikov, P. S. Medvedev +4
eROSITA (extended ROentgen Survey with an Imaging Telescope Array) instrument onboard the Russian-German `Spectrum-Roentgen-Gamma' (SRG) mission observed the Her X-1/HZ Her binary…
Modeling of 35-day superorbital cycle of and light curves of IMXB HZ Her/Her X-1
D. A. Kolesnikov, N. I. Shakura, K. A. Postnov +13
The X-ray binary Her X-1 consists of an accreting neutron star and the optical component HZ Her. The 35-day X-ray superorbital variability of this system is known since its discove…
Rapidly rotating neutron star progenitors
K. A. Postnov, A. G. Kuranov, D. A. Kolesnikov +2
Rotating proto-neutron stars can be important sources of gravitational waves to be searched for by present-day and future interferometric detectors. It was demonstrated by Imshenni…