Browsing by Author "Suleimanov V.F."

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  • An observational argument against accretion in magnetars 
    Doroshenko V.; Santangelo A.; Suleimanov V.F.; Tsygankov S.S. (2020)
    © ESO 2020. The phenomenology of anomalous X-ray pulsars is usually interpreted within the paradigm of very highly magnetized neutron stars, also known as magnetars. According to this paradigm, the persistent emission of ...
  • Burst-induced coronal cooling in GS 1826-24: The clock wagging its tail 
    Sánchez-Fernández C.; Kajava J.J.E.; Poutanen J.; Kuulkers E.; Suleimanov V.F. (2020)
    © ESO 2020. Type I X-ray bursts in GS 1826-24, and in several other systems, may induce cooling of the hot inner accretion flow that surrounds the bursting neutron star. Given that GS 1826-24 remained persistently in the ...
  • Colors and patterns of black hole X-ray binary GX 339-4 
    Kosenkov I.A.; Veledina A.; Suleimanov V.F.; Poutanen J. (2020)
    © ESO 2020. Black hole X-ray binaries show signs of nonthermal emission in the optical to near-infrared range. We analyzed optical to near-infrared SMARTS data on GX 339-4 over the 2002-2011 period. Using soft state data, ...
  • Magnetospheric return-current-heated atmospheres of rotation-powered millisecond pulsars 
    Salmi T.; Suleimanov V.F.; Nättilä J.; Poutanen J. (2020)
    © 2020 ESO. We computed accurate atmosphere models of rotation-powered millisecond pulsars in which the polar caps of a neutron star (NS) are externally heated by magnetospheric return currents. The external ram pressure, ...
  • Measuring the masses of magnetic white dwarfs: A NuSTAR legacy survey 
    Shaw A.W.; Heinke C.O.; Mukai K.; Tomsick J.A.; Doroshenko V.; Suleimanov V.F.; Buisson D.J.K.; Gandhi P.; Grefenstette B.W.; Hare J.; Jiang J.; Ludlam R.M.; Rana V.; Sivakoff G.R. (2020)
    © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. The hard X-ray spectrum of magnetic cataclysmic variables can be modelled to provide a measurement of white dwarf mass. ...
  • Middle aged γ-ray pulsar J1957+5033 in X-rays: Pulsations, thermal emission, and nebula 
    Zyuzin D.A.; Karpova A.V.; Shibanov Y.A.; Potekhin A.Y.; Suleimanov V.F. (2021)
    We analyse new XMM-Newton and archival Chandra observations of the middle-aged γ-ray radio-quiet pulsar J1957+5033. We detect, for the first time, X-ray pulsations with the pulsar spin period of the point-like source ...
  • Observational appearance of rapidly rotating neutron stars: X-ray bursts, cooling tail method, and radius determination 
    Suleimanov V.F.; Poutanen J.; Werner K. (2020)
    © ESO 2020. Neutron stars (NSs) in low-mass X-ray binaries rotate at frequencies high enough to significantly deviate from sphericity (ν∗ ∼200-600 Hz). First, we investigate the effects of rapid rotation on the observational ...
  • Spectrum formation in X-ray pulsars at very low mass accretion rate: Monte Carlo approach 
    Mushtukov A.A.; Suleimanov V.F.; Tsygankov S.S.; Portegies Zwart S. (2021)
    Recently, it has been discovered that the transition of X-ray pulsars to the low luminosity state ($L\lesssim 10{35}\, {\rm erg\ \rm s{-1}}$) is accompanied by a dramatic spectral change. That is, the typical power-law-like ...
  • Statistics of white dwarf properties in intermediate polars 
    Suleimanov V.F.; Doroshenko V.A.; Werner K. (2020)
    © The Author(s), 2020. Many intermediate polars are hard X-ray sources. The theory of their hard X-ray radiation is well developed and allows us to determine white dwarf masse in this kind of cataclysmic variables. Here ...

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