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35 papers · 1 filter
Conductivity of graphene in the framework of Dirac model: Interplay between nonzero mass gap and chemical potential
G. L. Klimchitskaya, V. M. Mostepanenko, V. M. Petrov
The complete theory of electrical conductivity of graphene at arbitrary temperature is developed with taken into account mass-gap parameter and chemical potential. Both the in-plan…
Features of Microwave Radiation and Magnetographic Characteristics of Solar Active Region NOAA 12242 Before the X1.8 Flare on December 20, 2014
V. E. Abramov-Maximov, V. N. Borovik, L. V. Opeikina +2
This paper continues the cycle of authors' works on the detection of precursors of large flares (M5 and higher classes) in active regions (ARs) of the Sun by their microwave radiat…
Constraints on Spin of a Supermassive Black Hole in Quasars with Big Blue Bump
M. Yu. Piotrovich, Yu. N. Gnedin, T. M. Natsvlishvili +1
We determined the spin value of supermassive black hole (SMBH) in active galactic nuclei (AGN) with investigated ultraviolet-to-optical spectral energy distribution, presented in t…
Radiative transfer in scattering stochastic atmospheres
N. A. Silant'ev, G. A. Alekseeva, V. V. Novikov
Many stars, active galactic nuclei, accretion discs etc. are affected by the stochastic variations of temperature, turbulent gas motions, magnetic fields, number densities of atoms…
Galactic Kinematics Derived from Data in the RAVE5, UCAC4, PPMXL, and Gaia TGAS Catalogs
V. V. Vityazev, A. S. Tsvetkov, V. V. Bobylev +1
The spatial velocities of the stars with high-precision positions, proper motions and parallaxes from the Gaia TGAS catalog and line-of-sight velocities from the RAVE5 catalog are…
MASTER optical detection of the first LIGO/Virgo neutron stars merging GW170817
V. M. Lipunov, E. Gorbovskoy, V. G. Kornilov +30
Following the reported discovery of the gravitational-wave pulse GW170817/ G298048 by three LIGO/Virgo antennae (Abbott et al., 2017a), the MASTER Global Robotic Net telescopes obt…