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Эффект двойного плазменного резонанса и его роль в радиоастрономии
Успехи физических наук. 2016. Т. 186. № 10. С. 1090-1116.
The double plasma resonance effect is a phenomenon in which plasma waves in a magnetized
plasma show a sharp increase in instability when the upper hybrid frequency coincides
with a cyclotron harmonic frequency. a radiation mechanism associated with this effect
provides an explanation of the origin of the "zebra pattern" in radio spectra of
the Sun, Jupiter and the Crab pulsar. The diversity of these astronomical objects and
the successful interpretation of their spectra in terms of the double plasma resonance
effect point to the universal nature of this phenomenon and suggest that one and same radiation mechanism may operate under a variety of astronomical conditions.
Zheleznyakov V. V., V. E. Shaposhnikov, Monthly Notices of the Royal Astronomical Society 2020 Vol. 495 No. 4 P. 3715-3721
We study the origin of quasi-harmonic emission bands with fine structure observed in the
dynamic radiation spectra of high-frequency interpulses. The possible explanation of observed
structure is based on the effect of double plasma resonance (DPR) at electron cyclotron
harmonics realized in the magnetosphere of pulsar in a local radio emission source filled
with non-relativistic plasma. The model of ...
Added: September 10, 2020
V. E. Shaposhnikov, Zaitsev V. V., Litvinenko G. V., JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 2018 Vol. 123 No. 11 P. 9395-9405
The ion cyclotron waves instability near the frequencies of ionic cyclotron harmonics is studied under conditions typical for the Jovian kilometer radio emission source. This instability is caused by the presence of the ions with a nonequilibrium loss cone-type distribution function in the source. Expressions for the growth rate of the ion cyclotron wave’s instability ...
Added: November 16, 2018
Litvinenko G. V., V. E. Shaposhnikov, Konovalenko A. A. et al., Icarus 2016 Vol. 272 P. 80-87
We investigate the dynamic spectra of the Sun and Jovian decametric radiation obtained by the authors with the radio telescopes UTR-2 and URAN-2 (Kharkov, Poltava, Ukraine). We focus on the similar structures that appear on the dynamic spectra of those objects: S-bursts, drifting pairs, absorption bursts and zebra patterns. Similarity in structures allows us to ...
Added: February 29, 2016
Bespalov P. A., Olga N. Savina, Monthly Notices of the Royal Astronomical Society 2020 Vol. 498 P. 2864-2870
A model for the source of microwave main giant pulses (GPs) from the Crab pulsar is proposed and partly investigated. Pulse excitation takes place in a relativistic pair plasma with a strong magnetic field through the beam pulse amplifier (BPA) mechanism, in which short noise pulses of a certain type are amplified by energetic electrons ...
Added: August 18, 2020
Zlotnik E. Y., V. E. Shaposhnikov, Zaitsev V. V., JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 2016 Vol. 121 No. 6 P. 5307-5318
The origin of a fine structure as quasi-harmonic parallel drifting stripes of enhanced brightness (zebra pattern) in the dynamic spectrum of Jovian kilometric radiation is discussed. A possible interpretation of the observed structure based on the effect of double plasma resonance (DPR) in the Jupiter magnetosphere is analyzed. It is shown that the observed features ...
Added: November 18, 2016
Savina O. N., Bespalov P. A., Central European Astrophysical Bulletin 2013 Vol. 37 No. 2 P. 507-512
Peculiarities of acoustic-gravity wave near the solar atmosphere transition region are analysed. An investigation is based on an original characteristic relation of waves in a two layers model with a temperature jump. Special attention is paid to an analysis of the properties of the surface waves, generated by the source of mass, which crosses the ...
Added: September 25, 2013
Samodurov V., Тюльбашев С. А., Торопов М. О. et al., Астрономический журнал 2022 Т. 99 № 4 С. 334-341
A search for impulse signals was carried out in a new site included in the monitoring program for the search for pulsars and transients. Processing of several months of data recorded in six frequency channels with a total bandwidth of 2.5 MHz showed that, on average, 4 pulses per hour are observed in each of ...
Added: April 23, 2022
Zimovets I., Lukin A., Artemyev A., Cosmic Research 2022 Vol. 60 No. 6 P. 420-436
Reconnection of magnetic lines of force represents a universal process of releasing the stored energy of the magnetic field and its transformation into the thermal energy of plasma and the energy of accelerated charged particles. The initialization and proceeding of the magnetic reconnection process are essentially related with the dynamics of a spatially localized region ...
Added: October 19, 2022
P. A. Bespalov, O. N. Savina, Geomagnetism and Aeronomy 2022 Vol. 62 No. 8 P. 1128-1135
The effect of global resonance in Jupiter’s middle magnetosphere is largely determined by the magnitude
and functional dependence of the radial diffusion coefficient of relativistic electrons across magnetic
shells. The relationship between the collective processes of formation of the radial distribution of density in
an equatorial plasma disk in the case of interchange instability and the coefficient of ...
Added: January 31, 2023
Grines V., Pochinka O., Dynamical Systems 2018 Vol. 33 No. 3 P. 536-546
Numerous magnetic fragments in the interior of the Sun give rise to many interesting energy processes in the solar corona, for example solar flares and prominences. Magnetic charge topology explains these phenomena by appearance and disappearance of heteroclinic trajectories (separators) --- magnetic lines that belong to an intersection of stable and unstable invariant two-dimensional manifolds ...
Added: October 17, 2017
Zheleznyakov V. V., Bespalov P. A., Astronomy Letters 2018 Vol. 44 No. 7 P. 442-456
A model for the source of microwave bursts from the Crab pulsar in the form of a current sheet
with a transversemagnetic field has been investigated. The emission generation mechanism is based on the
excitation of plasma waves at the double plasma resonance frequencies in a nonrelativistic nonequilibrium
plasma followed by their scattering into electromagnetic waves that escape ...
Added: October 19, 2018
Родин А. Е., Орешко В. В., Samodurov V., Астрономический журнал 2017 Т. 94 № 1 С. 35-43
Описан метод поиска новых периодических источников радиоизлучения, основанный на спектральном анализе, по данным ежедневного мониторинга неба на Большой синфазной антенне (БСА) Пущинской радиоастрономической обсерватории АКЦ ФИАН на частоте 111 МГц. Обсуждаются особенности обнаружения таких источников на БСА. Приводится список обнаруженных периодических источников (всего 16 пульсароподобных источников), их координаты, период и мера дисперсии. ...
Added: March 13, 2017
Железняков В. В., Письма в Астрономический журнал 2018 Т. 44 № 7 С. 483-498
A model for the source of microwave bursts from the Crab pulsar in the form of a current sheet
with a transversemagnetic field has been investigated. The emission generation mechanism is based on the
excitation of plasma waves at the double plasma resonance frequencies in a nonrelativistic nonequilibrium
plasma followed by their scattering into electromagnetic waves that escape ...
Added: October 19, 2018
P.A.Bespalov, O.N.Savina, Geomagnetism and Aeronomy 2023 Vol. 63 No. 7 P. 910-915
According to modern concepts, Type I noise storms in the meter wavelength range (30–400 MHz), consisting of a large number of narrow-band short bursts, are excited in the rarefied solar corona. These radiations are characterized by a high brightness temperature and circular polarization. Despite many advances in theory and confidence that the mechanism of radiation ...
Added: December 22, 2023
I.A. Bakunina, Melnikov V. F., Solov'ev A. A. et al., Solar Physics 2015 Vol. 290 No. 1 P. 37-52
We studied a number of solar active regions using two-dimensional spatially resolved microwave observations. Data from the Nobeyama Radioheliograph and the Siberian Solar Radio Telescope together with observations by the Michelson Doppler Imager (MDI) onboard the Solar and Heliospheric Observatory (SOHO) have allowed us to identify long-lived intersunspot sources (ISSs) in most of the investigated ...
Added: September 8, 2014
Даниленко А. А., Карпова А. В., Ofengeim D. et al., Monthly Notices of the Royal Astronomical Society 2020 Vol. 493 No. 2 P. 1874-1887
We report results of XMM-Newton observations of a γ-ray pulsar J0633+0632 and its wind nebula. We reveal, for the first time, pulsations of the pulsar X-ray emission with a single sinusoidal pulse profile and a pulsed fraction of 23 ± 6 per cent in the 0.3-2 keV band. We confirm previous Chandra findings that the ...
Added: November 11, 2020
Окубо Ю. undefined., Journal of Physics: Conference Series 2017 Vol. 804 No. 012036 P. 1-8
We investigate the existence and the orthogonality of the generalized Jack symmetric functions which play an important role in the AGT relations. We show their orthogonality by deforming them to the generalized Macdonald symmetric functions. ...
Added: October 26, 2017
Andrew G. Semenov, Zaikin A., Physical Review B: Condensed Matter and Materials Physics 2013 Vol. 88 No. 5 P. 054505-1-054505-10
We investigate the effect of interacting quantum phase slips on persistent current and its fluctuations in ultrathin superconducting nanowires and nanorings pierced by the external magnetic flux. We derive the effective action for these systems and map the original problem onto an effective sine-Gordon theory on torus. We evaluate both the flux dependent persistent current ...
Added: February 9, 2015
Slunyaev A., Кокорина А. В., Water Waves, Springer 2019 P. 1-20
The issue of accounting of the wave breaking phenomenon in direct numerical simulations of oceanic waves is discussed. It is emphasized that this problem is crucial for the deterministic description of waves, and also for the dynamical calculation of extreme wave statistical characteristics, such as rogue wave height probability, asymmetry, etc. The conditions for accurate ...
Added: October 13, 2019
Marshakov A., Миронов А. Д., Морозов А. Ю., Journal of Geometry and Physics 2011 Vol. 61 P. 1203-1222
We present a summary of current knowledge about the AGT relations for conformal blocks with additional insertion of the simplest degenerate operator, and a special choice of the corresponding intermediate dimension, when the conformal blocks satisfy hypergeometric-type differential equations in position of the degenerate operator. A special attention is devoted to representation of conformal block ...
Added: February 28, 2013
Min Namkung, Younghun K., Scientific Reports 2018 Vol. 8 No. 1 P. 16915-1-16915-18
Sequential state discrimination is a strategy for quantum state discrimination of a sender’s quantum
states when N receivers are separately located. In this report, we propose optical designs that can
perform sequential state discrimination of two coherent states. For this purpose, we consider not
only binary phase-shifting-key (BPSK) signals but also general coherent states, with arbitrary prior
probabilities. Since ...
Added: November 16, 2020
Prazdnichnykh A., Glazov M., Ren L. et al., Physical Review B: Condensed Matter and Materials Physics 2021 Vol. 103 No. 8 P. 085302-1-085302-12
The exciton valley dynamics in van der Waals heterostructures with transition metal dichalcogenide monolayers is driven by the long-range exchange interaction between the electron and the hole in the exciton. It couples the states active in the opposite circular polarizations resulting in the longitudinal-transverse splitting of excitons propagating in the monolayer plane. Here we study ...
Added: March 5, 2021
Pelinovsky E., Didenkulova I., Rybkin A., Journal of Fluid Mechanics 2014 Vol. 748 P. 416-432
We present an exact analytical solution of the nonlinear shallow water theory for wave run-up in inclined channels of arbitrary cross-section, which generalizes previous studies on wave run-up for a plane beach and channels of parabolic cross-section. The solution is found using a hodograph-type transform, which extends the well-known Carrier–Greenspan transform for wave run-up on ...
Added: November 19, 2014
Pelinovsky E., Kurkin A. A., Kozelkov A. et al., European Journal of Mechanics - B/Fluids 2018 Vol. 72 P. 616-623
The paper presents results of numerical simulations of freely rising solid spheres in a viscous fluid. The
diameter of spheres was 5 mm, 7 mm, 10 mm, and 20 mm, and the corresponding Reynolds numbers
varies in the interval 1400 < Re < 10100. It has been found that the free rise path varies, as the
Galileo number ...
Added: October 21, 2018