From the 2 of 35 papers with an AI index.
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- Austrian Academy of SciencesAT10 papers
- Max Planck Institute for AstrophysicsDE8 papers
- University College LondonGB6 papers
- Center for Astrophysics Harvard & SmithsonianUS5 papers
- Instituto de Astrofísica de CanariasES5 papers
- National Research University Higher School of EconomicsRU5 papers
- University of BernCH5 papers
- University of OxfordGB5 papers
- Centre National de la Recherche ScientifiqueFR4 papers
- Goddard Space Flight CenterUS4 papers
- Institute of Astrophysics and Space SciencesPT4 papers
- Ioffe InstituteRU4 papers
9 papers · 1 filter
A broadband outburst of the compact steep-spectrum quasar 3C 138 in 2024-2026
T. V. Mufakharov, Yu. V. Sotnikova, V. V. Vlasyuk +20
After several decades of relative quiescence, the compact steep-spectrum quasar 3C 138 entered an active phase in 2024-2026, exhibiting strong broadband flaring. We investigate its…
Magnetospheric flows in X-ray pulsars II: Heating, cooling and ionization degree at sub-critical accretion
Alexander A. Mushtukov, Alexander Y. Potekhin, Valery F. Suleimanov +2
Magnetospheric accretion flows in X-ray pulsars shape their spectra, polarization, and variability. We model the thermal balance of the flow enveloping the neutron star magnetosphe…
Uniform models of neutron and quark (strange) stars in General Relativity
G. S. Bisnovatyi-Kogan, E. A. Patraman
Models of neutron and strange stars are considered in the approximation of a uniform density distribution. A universal algebraic equation, valid for any equation of state, is used…
Nature of 4FGL J2249.4+6229: Evidence for a redback system with a cool companion and low X-ray and -ray luminosities
A. V. Karpova, D. A. Zyuzin, S. V. Zharikov +1
We report the identification of the likely X-ray and optical counterpart to the unassociated Fermi source 4FGL J2249.4+6229. To clarify its nature, we investigate the X-ray data fr…
SRG/eROSITA-SDSS view on the relation between X-ray and UV emission for quasars
S. A. Prokhorenko, S. Yu. Sazonov, M. R. Gilfanov +5
Motivated by the idea of using quasars as standardizable candles for cosmology, we examine the relation between X-ray (at 2 keV, ) and ultraviolet (at 2500 Angstrom,…
Beaming of polarized radiation in subcritical X-ray pulsars
I. D. Markozov, A. Y. Potekhin, A. D. Kaminker +1
Radiation of X-ray pulsars is powered by accretion on the neutron star surface from a binary companion under the influence of a strong magnetic field. We study beaming of this radi…