Zobrazeno 1 - 10
of 145
pro vyhledávání: '"Shakura, N. I."'
Autor:
Haberl, F., Maitra, C., Carpano, S., Dai, X., Doroshenko, V., Dennerl, K., Freyberg, M. J., Sasaki, M., Udalski, A., Postnov, K. A., Shakura, N. I.
Publikováno v:
A&A 661, A25 (2022)
During its performance verification phase, the soft X-ray instrument eROSITA aboard the Spektrum-Roentgen-Gamma(SRG) spacecraft observed large regions in the Magellanic Clouds, where almost 40 known high-mass X-ray binaries (HMXBs, including candidat
Externí odkaz:
http://arxiv.org/abs/2108.11517
Autor:
Mereminskiy, I. A., Dodin, A. V., Lutovinov, A. A., Semena, A. N., Arefiev, V. A., Atapin, K. E., Belinski, A. A., Burenin, R. A., Burlak, M. V., Eselevich, M. V., Fedotieva, A. A., Gilfanov, M. R., Ikonnikova, N. P., Krivonos, R. A., Lapshov, I. Yu., Lyapin, A. R., Medvedev, P. S., Molkov, S. V., Postnov, K. A., Pshirkov, M. S., Sazonov, S. Yu., Shakura, N. I., Shtykovsky, A. E., Sunyaev, R. A., Tatarnikov, A. M., Tkachenko, A. Yu., Zheltoukhov, S. G.
Publikováno v:
A&A 661, A32 (2022)
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. Here we report on the discovery and multiwavelength follow-up of a pecu
Externí odkaz:
http://arxiv.org/abs/2107.05588
We consider a new mechanism for the removal of the angular momentum from an X-ray binary system and the change in its orbital period - the mass loss in the form of a wind from an accretion disc. Both observations and models predict powerful winds fro
Externí odkaz:
http://arxiv.org/abs/2105.11974
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 neutron star in Her X-1.
Comment: 2 figures, to be published in A
Comment: 2 figures, to be published in A
Externí odkaz:
http://arxiv.org/abs/2103.01820
Autor:
Shakura, N. I., Kolesnikov, D. A., Medvedev, P. S., Sunyaev, R. A., Gilfanov, M. R., Postnov, K. A., Molkov, S. V.
Publikováno v:
A&A 648, A39 (2021)
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 system in multiple scans over the source during the first and second S
Externí odkaz:
http://arxiv.org/abs/2102.12983
Autor:
Kolesnikov, D. A., Shakura, N. I., Postnov, K. A., Volkov, I. M., Bikmaev, I. F., Irsmambetova, T. R., Staubert, R., Wilms, J., Irtuganov, E., Golyshev, P. Yu., Shugarov, S. Yu., Nikolenko, I. V., Trunkovsky, E. M., Schönherr, G., Schwope, A., Klochkov, D.
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 discovery in 1972 by the Uhuru satellite and is believed to be caused by forc
Externí odkaz:
http://arxiv.org/abs/2009.07181
Autor:
Lukin, V. V., Malanchev, K. L., Shakura, N. I., Postnov, K. A., Chechetkin, V. M., Utrobin, V. P.
Publikováno v:
MNRAS, 2017, v. 467, pp. 2934-2942
We present the results of 3D-hydrodynamical simulations of accretion flow in the eclipsing dwarf nova V1239 Her in quiescence. The model includes the optical star filling its Roche lobe, a gas stream emanating from the inner Lagrangian point of the b
Externí odkaz:
http://arxiv.org/abs/1702.00587
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 464, Issue 1, p.410-417, 2017
The vertical structure of stationary thin accretion discs is calculated from the energy balance equation with heat generation due to microscopic ion viscosity {\eta} and electron heat conductivity {\kappa}, both depending on temperature. In the optic
Externí odkaz:
http://arxiv.org/abs/1609.03799
Publikováno v:
Monthly Notices of the Royal Astronomical Society 2015 452 (2): 1601-1611
Using RXTE/ASM archival data, we investigate the behaviour of the spectral hardness ratio as a function of X-ray luminosity in a sample of six transient X-ray pulsars (EXO 2030+375, GX 304-1, 4U 0115+63, V 0332+63, A 0535+26 and MXB 0656-072). In all
Externí odkaz:
http://arxiv.org/abs/1506.07082
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 luminosity from AINS turns out to be 2-3 orders of magnitude as small as
Externí odkaz:
http://arxiv.org/abs/1412.4066