Solar cosmic rays are generated during the primordial energy release in solar flares. This explosive process takes place in the solar corona above the active region at altitudes of 15 000 to 70 000 km. It represents the fast release of the magnetic field energy of the current sheet, which is formed near a singular magnetic field line under the influence of disturbances propagating from the...
Diffusion of relativistic runaway electron avalanches
One of the unsolved problems in atmospheric physics is the construction of a model of Terrestrial Gamma-ray Flashes (TGFs). This phenomenon was first discovered in 1994 by Compton Gamma Ray Observatory [1] and was observed by other space gamma-ray observatories such as Fermi [2], which were created for observing gamma radiation from...
The physical motivations and performance of the TAIGA (Tunka Advanced Instrument for cosmic ray physics and Gamma Astronomy) project are presented. The TAIGA observatory addresses ground-based gamma-ray astronomy at energies from a few TeV to several PeV, as well as cosmic ray physics from 100 TeV to several EeV and astroparticle physics. The pilot TAIGA-1 complex locates in the Tunka valley,...
The Telescope Array (TA) is the largest cosmic ray observatory in the Northern Hemisphere. It is designed to measure the properties of cosmic rays over a wide range of energies. TA with it's low energy extension (TALE) observe cosmic ray induced extensive air showers between 2x10^15 and 2x10^20eV in hybrid mode using multiple instruments, including an array of scintillator detectors at the...
The complementary approach to the investigations of extensive air showers (EAS) is very promising for conducting their multicomponent studies. In this approach, information about one or more EAS components, which is insignificant from the point of view of independent analysis, can be added to data on other components providing more accurate determination of the parameters of the extensive air...
In a number of experiments on the study of ultrahigh-energy cosmic rays, an excess of muons in extensive air showers in comparison with calculations performed within modern (post-LHC) models of hadronic interactions is observed. An analysis of the NEVOD-DECOR data over a long period of time indicates an increase in the excess of muon bundles with increasing energy of primary cosmic ray...
Two installations currently operating as part of the TAIGA Astrophysical Complex [1]: TAIGA-HiSCORE [2] -120 wide-angle Cherenkov stations on an area of 1 $km^2$ and TAIGA-IACT[3] - 3 IACTs, are playing the most important role in research in the field of very high-energy gamma-ray astronomy. The large area and unique methodological capabilities of the complex allow us to hope for new and...
In this work, anomalous events recorded by the TUS space detector are considered. In this research we try to give interpretation of this anomalous events, which, mostly, are caused by the thunderstorm activity. Different interpretations of this events like gamma-ray bursts, synchrotron radiation in the geomagnetic field of electrons/positrons in cosmic rays, an ascending extensive air shower,...
Observations of monthly electron and positron fluxes made from 2006 by PAMELA experiment continue investigation of the relative modulation of positively and negatively charged particles.
The comparison of the electron fluxes with proton and positron fluxes measured at about 1 GV in 23th and 24th solar cycles is presented.
The mantle -- a layer of nonspherical (pasta-like) nuclear shapes -- can exist in neutron stars and play an important role in their dynamics and evolution. We analyze accuracy of the Compressible Liquid Drop Model (CLDM), based on the thermodynamically consistent description of the surface properties calculated for the two-phase plane interface for given energy-density functional (for...
The solution of the kinetic equation for finding the distribution function of photons of two possible polarizations in an equilibrium e+e- plasma in a relatively strong magnetic field in the cold plasma approximation and taking into account
resonance on a virtual electron is considered. Using the Laplace transform and sum of the distribution function in terms of Legendre polynomials, the...
Based on the relativistic constraint technique[1] for the Dirac equation in the two-particles problem[2] positronium states in a strong uniform magnetic field are studied. The width of the singlet positronium state in such conditions is obtained in the explicit form. It is shown that the magnetic field sufficiently increases the decay width, comparing with the case of a free positronium....
Dark matter lighter than 10 GeV/c2 encompasses a promising range of candidates. The new analysis of the entire dataset acquired with a low-radioactivity argon target by the DarkSide-50 experiment at LNGS is presented. The new analysis benefits from more accurate calibration of the detector response, improved background model, and better determination of systematic uncertainties. A conceptual...
The shape of redshift distribution for uniform sources set in our Metagalaxy defined by cosmological parameters and properties of space. The type Ia supernovae usually considered as a homogeneous subsample because of suggestion that these luminous events could be used as standard candles for cosmological measurements. This mention occurs since the earliest studies of supernovae in 1938....
Preliminary results of the investigation of the properties of 13 clusters of galaxies from CfA2 redshift survey are discussed in the presented article. The distributions on absolute magnitude and luminosity represent two areas for clusters ##88, 1101, 1046, 142, 933, 1242, 1652, 107, 150, 316, 317, 961, 977. Redshifts of these clusters are in the region 0.002 – 0.032. Also several anomalies of...
