39 citations · 69 across the 8 of their papers we have counts for
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Detection of Gamma-ray Halos around Nearby Late-type Galaxies
M. S. Pshirkov, B. A. Nizamov
Various theoretical models predict the existence of extended -ray halo around normal galaxies that could be produced by interactions of cosmic rays with the circumgalactic mediu…
Annihilation of positrons from AGN jets as a possible source of cosmic gamma-ray background at energies below 511 keV
B. A. Nizamov, M. S. Pshirkov
The origin of the diffuse gamma-ray background in the range from hundreds keV to several MeV is not known conclusively. From current models and observations it is believed that, at…
Can observations of 511 keV line from the M31 galaxy shed light on the AGN jet composition?
B. A. Nizamov, M. S. Pshirkov
Positron annihilation line at 511~keV is a known component of the gamma-ray diffuse emission. It is believed to be produced in the Galaxy, but there could be possible extragalactic…
Gamma-ray flares from pulsar wind nebulae in the Large Magellanic Cloud
B. A. Nizamov, M. S. Pshirkov
High-energy radiation of young pulsar wind nebulae (PWNe) is known to be variable. This is most prominently exemplified by the Crab nebula which can undergo both rapid brightenings…
Gamma-ray flux depressions of the Crab nebula in the high-energy range
M. S. Pshirkov, B. A. Nizamov, A. M. Bykov +1
The giant gamma-ray flares of the Crab nebula discovered by AGILE and Fermi observatories came as a surprise and have challenged the existing models of pulsar wind nebulae. We have…
Constraints on the AGN flares as sources of ultra-high energy cosmic rays from the Fermi-LAT observations
B. A. Nizamov, M. S. Pshirkov
It is well known that if the most energetic cosmic rays ( eV) were protons then their acceleration sites should possess some extreme properties, including gigantic lumin…