A5003986244- Solar and Space Plasma Dynamics
- Solar Radiation and Photovoltaics
- Geomagnetism and Paleomagnetism Studies
- Geophysics and Gravity Measurements
- Reservoir Engineering and Simulation Methods
- Hydraulic Fracturing and Reservoir Analysis
- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Historical Astronomy and Related Studies
- Photovoltaic System Optimization Techniques
- Characterization and Applications of Magnetic Nanoparticles
- Computational Physics and Python Applications
- Ionosphere and magnetosphere dynamics
- Astronomy and Astrophysical Research
- Enhanced Oil Recovery Techniques
- Drilling and Well Engineering
- History and Developments in Astronomy
- Geometric Analysis and Curvature Flows
- Stochastic processes and statistical mechanics
- Machine Learning and Data Classification
- Relativity and Gravitational Theory
- Theoretical and Computational Physics
- Solar Thermal and Photovoltaic Systems
- Atmospheric Ozone and Climate
- Spectral Theory in Mathematical Physics
Lomonosov Moscow State University
2015-2025
Moscow Center For Continuous Mathematical Education
2020-2024
Skolkovo Institute of Science and Technology
2020-2024
Institute of Continuous Media Mechanics
2022-2023
New Jersey Institute of Technology
2020
Kalmyk State University
2018
Russian Academy of Sciences
2018
Solar Energetic Particle (SEP) events are interesting from a scientific perspective as they the product of broad set physical processes corona out through extent heliosphere, and provide insight into particle acceleration transport that widely applicable in astrophysics. From operations perspective, SEP pose radiation hazard for aviation, electronics space, human space exploration, particular missions outside Earth's protective magnetosphere including to Moon Mars. Thus, it is critical...
Abstract Solar energetic particle (SEP) events and their major subclass, solar proton (SPEs), can have unfavorable consequences on numerous aspects of life technology, making them one the most harmful effects activity. Garnering knowledge preceding such by studying operational data flows is essential for forecasting. Considering only cycle (SC) 24 in our previous study, we found that it may be sufficient to utilize soft X-ray (SXR) parameters SPE forecasts. Here, report a catalog recording...
We obtain the latitude-time distribution of averaged tilt angle solar bipoles. For large bipoles, which are mainly bipolar sunspot groups, spatially is positive in Northern hemisphere and negative Southern, with modest variations during course cycle. consider to be a tracer for crucial element dynamo, i.e. regeneration rate poloidal large-scale magnetic field from toroidal. The value obtained crudely corresponds factor corresponding about 10% r.m.s. velocity convection. These results develop...
Abstract Automated detection schemes are nowadays the standard approach for locating coronal holes in extreme-UV images from Solar Dynamics Observatory (SDO). However, factors such as noisy nature of solar imagery, instrumental effects, and others make it challenging to identify using these automated schemes. While discrepancies between have been noted literature, a comprehensive assessment is still lacking. The contribution Coronal Hole Boundary Working Team COSPAR ISWAT initiative close...
The role of memory time fluctuations for instabilities in random media is considered. It shown that can result infinitely fast growth statistical moments. effect demonstrated the framework light propagation Universe, which contains curvature while remaining homogeneous and isotropic on average.
Current coronal holes segmentation methods typically rely on image thresholding and require non-trivial pre- post-processing. We have trained a neural network that accurately isolates CHs from SDO/AIA 193 Angstrom solar disk images without additional complicated steps. compare results with publicly available catalogues of demonstrate stability the approach. In our opinion, this approach can outperform hand-engineered analysis will wide application to data. particular, we investigate...
Coronal holes are the observational manifestation of solar magnetic field open to heliosphere and pivotal importance for our understanding origin acceleration wind. Observations from space missions such as Solar Dynamics Observatory now allow us study coronal in unprecedented detail. Instrumental effects other factors, however, pose a challenge automatically detect imagery. The science community addresses these challenges with different detection schemes. Until now, little attention has been...
We consider a model of random media with fixed and finite memory time abrupt losses (renovation model). Within the intervals we can observe either amplification or oscillation vector field in given particle. The cumulative effect amplifications many subsequent leads to mean energy. Similarly, intermittent oscillations also energy, however, at lower rate. Finally, alone resonate yield growth These are three mechanisms that investigate compute analytically numerically rates based on Jacobi...
ABSTRACT French astronomer Honoré Flaugergues compiled astronomical observations in a series of handwritten notebooks for 1782–1830, which are preserved at Paris Observatory. We reviewed these manuscripts and encoded the records that contain sunspot measurements into numerical table further analysis. All timings, we found three types measurements, allowing reconstruction heliographic coordinates. In first case, Sun sunspots cross vertical horizontal wires; second one two mirror-symmetric...
The authors of this white paper met on 16-17 January 2020 at the New Jersey Institute Technology, Newark, NJ, for a 2-day workshop that brought together group heliophysicists, data providers, expert modelers, and computer/data scientists. Their objective was to discuss critical developments prospects application machine and/or deep learning techniques analysis, modeling forecasting in Heliophysics, shape strategy further field. combined set plenary sessions featuring invited introductory...
Abstract We investigate to what extent the wings of solar butterfly diagrams can be separated without an explicit usage Hale's polarity law as well location equator. apply two algorithms cluster analysis for this purpose, namely DBSCAN and C‐means, demonstrate their ability separate contemporary based on sunspot group density in diagram only. Then we method historical data concerning activity 18th century (Staudacher data). The separates Cycle 2, but fails them 1. In our opinion, finding...
A spectacular phenomenon of intermittency, i.e. a progressive growth higher statistical moments physical field excited by an instability in random medium, attracted the attention Zeldovich last years his life. At that time, mathematical aspects underlying description this were still under development and relations between various findings remained obscure. Contemporary results from theory product independent matrices (the Furstenberg theory) allowed elaboration intermittency systematic way....
The flux of energetic particles originating from the Sun fluctuates during solar cycles. It depends on number and properties Active Regions (ARs) present in a single day associated activities, such as flares coronal mass ejections (CMEs). Observational records Space Weather Prediction Center (SWPC NOAA) enable creation time-indexed databases containing information about ARs particle enhancements, most widely known Solar Energetic Particle events (SEPs). In this work, we utilize data...
The dynamo mechanism is a process of magnetic field self-excitation in moving electrically conducting fluid. One the most interesting applications this related to astrophysical systems case random motion plasma. For very first stage process, governing equation can be reduced system first-order ordinary differential equations. we suggest regular method calculate growth rate energy. Based on for flow with finite memory time and anisotropic statistical distribution stretching matrix compare...
We consider classical magnetic helicity (a Gauss invariant of lines) and higher invariants as nonlinear constraints for dynamo action. argue that the has several properties absent from which prevents use latter to constrain other helicities (hydrodynamic cross helicity) in context problem.