16 citations · 54 across the 18 of their papers we have counts for
18 papers
Cycle Variation in the Occurrence of Great Soft X-ray Solar Flares
V. N. Obridko, M. M. Katsova, D. D. Sokoloff
Powerful nonstationary processes such as flares and coronal mass ejections are detected mainly near the solar cycle maxima. However, the analysis of the great flares since 1975, wh…
Do Planets Affect the Behavior of the Long-term Solar Activity?
M. M. Katsova, V. N. Obridko, D. D. Sokoloff +1
Solar activity is a process driven by many independent but interconnected phenomena. Although the 11-year cycle is the result of operation of the dynamo mechanism, the cause of lon…
Resonances and Stellar Cycles: Observations and Modelling
M. M. Katsova, F. A. Azizov, V. N. Obridko +2
In the paper we discuss the possibility of the influence of parametric excitation, in particular, planetary gravitational interaction, on the behavior of stellar magnetic activity…
North-South Asymmetry of the Solar Activity at Different Spatial Scales
V. N. Obridko, A. S. Shibalova, D. D. Sokoloff +1
Solar activity seems quite understandable when considered on the scales comparable with a solar cycle, i.e. about 11 years, and on a short time scale of about a year. A solar cycle…
Injection of magnetic helicity in solar cycle 24 and early phase of cycle 25
H. Q. Zhang, S. B. Yang, K. M. Kuzanyan +3
The injection of magnetic helicity into the heliosphere during solar cycle 24 and the early phase of cycle 25 has been calculated based on the analysis of a series of synoptic magn…
Structures of various types of symmetry in the solar activity cycle
V. N. Obridko, A. S. Shibalova, D. D. Sokoloff
The solar cycle is a complex phenomenon. To comprehensively understand it, we have to study various tracers. The most important component of this complex is the solar dynamo, which…
Is There a Synchronizing Influence of Planets on Solar and Stellar Cyclic Activity?
V. N. Obridko, M. M. Katsova, D. D. Sokoloff +1
This work continues our research of connection between the long-term activity of stars and their planets. We analyze new data on the previously considered two dozen solar-type star…
Gnevyshev gap in the large-scale magnetic field
V. N. Obridko, A. S. Shibalova, D. D. Sokoloff
The phenomenon of the Gnevyshev gap was first identified in the solar-corona irradiance data (green line). Later, it was studied in the sunspot, coronal, and heliospheric data. We…
Cyclic variations of the structure and energetics of solar magnetic fields
V. N. Obridko, A. S. Shibalova, D. D. Sokoloff
The solar cycle is a complex phenomenon, a comprehensive understanding of which requires the study of various tracers. Here, we consider the solar cycle as manifested in the harmon…
The Structure of the Solar Cycle and of the Activity Cycles of Late-Type Stars
V. N. Obridko, D. D. Sokoloff, M. M. Katsova
It is shown that the description of the solar cycle that takes into account the odd zonal harmonic of the solar magnetic field allows us to deepen our knowledge of two important as…
Relating photometric and magnetic properties of structures at solar surface
V. N. Obridko, D. D. Sokoloff, M. K. Katsova
We investigate sharp structures visible in solar magnetic field tracers. It is shown that the sunspot magnetic boundaries do not coincide with the photometric ones. Moreover, there…
Some comments on the matching of photometric and magnetic properties of structures at the solar surface
V. N. Obridko, D. D. Sokoloff, M. M. Katsova
We investigate sharply outlined features recorded in solar magnetic field tracers. It is shown that the magnetic boundaries of a sunspot do not coincide with the photometric ones.…
Estimates of the Height and Date of the 25th Cycle of Solar Activity
V. N. Obridko, D. D. Sokoloff, M. M. Katsova
Further development of the work of Obridko et al. [1] based on recent data confirms the assumption that the 25th cycle of solar activity is a medium-low cycle. Its height is expect…
The Extended Solar Cycle and Asymmetry of the Large-Scale Magnetic Field
V. N. Obridko, A. S. Shibalova, D. D. Sokoloff
Traditionally, the solar activity cycle is thought as an interplay of the main dipole component of the solar poloidal magnetic field and the toroidal magnetic field. However, the r…
Solar and stellar activity cycles -- no synchronization with exoplanets
V. N. Obridko, M. M. Katsova, D. D. Sokoloff
Cyclic activity on the Sun and stars is primarily explained by generation of the magnetic field by a dynamo mechanism, which converts the energy of the poloidal field into the ener…
Solar and stellar flares: frequency, active regions and stellar dynamo
M. M. Katsova, V. N. Obridko, D. D. Sokoloff +1
We demonstrate that for weak flares the dependence on spottedness can be rather weak. The fact is that such flares can occur both in small and large active regions. At the same tim…
Synthetic solar cycle for active regions violating the Hale's polarity law
A. Zhukova, A. Khlystova, V. Abramenko +1
Long observational series for bipolar active regions (ARs) provide significant information about the mutual transformation of the poloidal and toroidal components of the global sol…
Zonal harmonics of solar magnetic field for solar cycle forecast
V. N. Obridko, D. D. Sokoloff, V. V. Pipin +2
According to the scheme of action of the solar dynamo, the poloidal magnetic field can be considered a source of production of the toroidal magnetic field by the solar differential…