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Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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283 papers · 1 filter
Possible Sources of Iron Nuclei in Ultra-High-Energy Cosmic Rays
Anna Uryson
The origin of a cosmic ray particle with an ultra-high energy of 2.44 x 10^20 eV recorded by the Telescope Array is discussed by assuming that it is a heavy nucleus, namely an iron…
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…
Synchrotron radiation in nonuniform magnetic field
V. S. Beskin, A. Yu. Istomin, F. A. Kniazev +1
The distortion of the spectrum of synchrotron radiation received by a distant observer due to magnetic field inhomogeneity is discussed. It is shown that for single-particle radiat…
Magnetic field and plasma number density from radio and millimeter core measurements in AGN jets
E. E. Nokhrina, A. P. Lobanov, A. Yu. Istomin +1
Understanding the mechanism for launching relativistic jets in active galactic nuclei relies upon measuring the magnetic field strength and emitting plasma number density, tracing…
A hidden ultra-relativistic spine in the jet of a neutrino-associated blazar
Y. Y. Kovalev, F. Eppel, D. C. Homan +16
Supermassive black holes launch powerful jets of plasma that can accelerate particles to extreme energies, but the physical conditions required to produce high-energy neutrinos rem…
Hydrodynamic model of nonthermal emission from the Fermi bubbles
V. A. Dogiel, D. O. Chernyshov, T. S. Fatekhov +2
We suggest a model of Fermi Bubbles (FBs) in the Galactic halo of the altitude about 7-8 kpc, which is seen in non-thermal microwave and gamma-ray ranges. It was assumed that this…
Multiwavelength quasi-periodic variability of the blazar Ton 599
Yu. V. Sotnikova, T. V. Mufakharov, A. E. Volvach +34
During the last 40-50 years, the TeV blazar Ton 599 has systematically experienced major outbursts detected in a wide wavelength range from radio to -rays. In this work, we pres…
The nearby He-rich superluminous supernova SN 2021bnw during photospheric phases
A. Fiore, A. Kozyreva, L. Yan +40
Aim. We present and interpret the data of the nearby hydrogen-deficient but helium-rich superluminous supernova SN 2021bnw which reached a magnitude of -20.7 at maximum luminosity…
Pulsar B1237+25 at 111~MHz: average profile, mode switching, nullings, microstructure
M. V. Popov, T. V. Smirnova
The observations of B1237+25 at a frequency of 111 MHz were analyzed. For the first time in the normal radiation mode a new component in the central region in the average profile w…
Multi-messenger flare in the quasar PKS 0446+11
Y. Y. Kovalev, M. F. Aller, A. K. Erkenov +15
The physical mechanisms driving neutrino and electromagnetic flares in blazars remain poorly understood. We investigate a prominent multi-messenger flare in the quasar PKS 1424+240…
Jet MHD analytical model - framework for radiative transfer
E. E. Nokhrina, I. N. Pashchenko, V. A. Frolova +1
We developed the full magnetohydrodynamical analytical jet model that allows accurate reproducing of a transversal and longitudinal structure for a highly collimated relativistic j…
Dim cores of radio-bright AGN jets: VLBI and Gaia astrometry pinpoint different parsec-scale features
A. V. Popkov, Y. Y. Kovalev, A. V. Plavin +2
Astrometry with the very long baseline radio interferometry (VLBI) allows to determine the position of a point close to the source's brightest compact detail at milliarcsecond scal…
On the angular anisotropy of the distribution function of radiating particles in relativistic jets
T. I. Khalilov, V. S. Beskin, V. I. Pariev
The observed power-law spectra of relativistic jets from active galactic nuclei clearly indicate a synchrotron mechanism of radiation by particles that similarly possess a power-la…
Acceleration Potential and Density Profile of Secondary Plasma in the Magnetosphere of Orthogonal Pulsars
A. Yu. Istomin, F. A. Kniazev, V. S. Beskin
A new method for determining the accelerating potential above the polar caps of radio pulsars with an arbitrary inclination angle of the magnetic axis to the rotation axis has been…
Looking into the Jet Cone of the Neutrino-Associated Very High Energy Blazar PKS 1424+240
Y. Y. Kovalev, A. B. Pushkarev, J. L. Gomez +7
The acceleration process of massive particles as well as the production of very high energy (VHE) photons and neutrinos remains a fundamental challenge in astrophysics. We investig…
Search for interpulses in a complete sample of pulsars at a frequency of 111 MHz
M. O. Toropov, S. A. Tyul'bashev, V. S. Beskin
An interpulse search was carried out in a sample of 96 pulsars observed on the Large Phased Array (LPA) radio telescope in the Pushchino Multibeams Pulsar Search (PUMPS). The pulsa…
Sources and Radiations of the Fermi Bubbles
Vladimir A. Dogiel, Chung-Ming Ko
Two enigmatic gamma-ray features in the Galactic central region, known as Fermi Bubbles (FBs), were found from Fermi-LAT data. An energy release (e.g., by tidal disruption events i…
On the possible core shift break in relativistic jets
E. E. Nokhrina
Measurement of a jet geometry transition region is an important instrument of assessing the jet ambient medium properties, plasma bulk motion acceleration, parameters of a black ho…
SN 2023ixf -- an average-energy explosion with circumstellar medium and a precursor
Alexandra Kozyreva, Andrea Caputo, Petr Baklanov +2
Abridged: The fortunate proximity of the SN2023ixf allowed astronomers to follow its evolution from almost the moment of the collapse of the progenitor's core. SN2023ixf can be exp…
Primary and secondary source of energy in the superluminous supernova 2018ibb
Alexandra Kozyreva, Luke Shingles, Petr Baklanov +2
We examine the pair-instability origin of superluminous supernova 2018ibb. As the base model, we use a non-rotating stellar model with an initial mass of 250 Msun at about 1/15 sol…
Spin-down of a pulsar with a yielding crust
Denis Nikolaevich Sob'yanin
In light of the discovery of the long-period radio pulsar PSR J0901-4046, it is interesting to revisit a question about how the magnetized neutron star slows down its rotation. In…
Evidence for a toroidal magnetic field in the core of 3C 84
G. F. Paraschos, L. C. Debbrecht, J. A. Kramer +13
The spatial scales of relativistic radio jets, probed by relativistic magneto-hydrodynamic jet launching simulations (RMHDs) and by most very-long-baseline interferometry (VLBI) ob…
Pushchino multibeams pulsar search. IV. Detection of new pulsars at declinations -9o < δ< +55o
S. A. Tyul'bashev, G. E. Tyul'basheva, M. A. Kitaeva +3
The search for pulsars in monitoring data obtained at the radio telescope Large Phased Array (LPA) at a frequency of 111 MHz was carried out. Daily round-the-clock observations wer…
Pushchino multibeams pulsar search -- III. Drift periods of pulsars from summed power spectra method
T. V. Smirnova, S. A. Tyul'bashev, M. A. Kitaeva +1
The drift periods P2 and P3 were searched for using the summed power spectra of 41 pulsars observed at declinations from -9o to +42o. The power spectra of pulses with a given perio…