The paper deals with the problem of explaining origin and nature space-time variations in magnetic activity Sun. It presents a new hydrodynamic model solar cycle, which uses helioseismological data on differential rotation convective zone. is based hypothesis emergence global flows as result loss stability differentially rotating plasma layer First, are calculated without accounting for effect ...

Context. The Sun and solar-like stars undergo activity cycles for which the underlying mechanisms are not well understood. The oscillations of the Sun are known to vary with its activity cycle and these changes provide diagnostics on the conditions below the photosphere. Kepler has detected oscillations in hundreds of solar-like stars but as of yet, no widespread detection of signatures of magn...

We study the neutrino oscillations in presence of rapidly varying external fields. The effective Hamiltonian describing the evolution of the system of the neutrinos is derived. We examine the resonance conditions in the case of general rapidly varying external fields. The neutrino spin-flavor oscillations in the combination of the constant transversal and twisting magnetic fields are considered...

We study the neutrino oscillations in presence of frequently varying external fields. The effective Hamiltonian describing the evolution of the system of the neutrinos is derived. We also examine the resonance conditions in the case of general frequently varying external fields. The neutrino spin-flavor oscillations in the combination of the constant transversal and twisting magnetic fields are...

The dynamics of the quiet solar atmosphere are highly nonlinear. Both the standing waves of solar oscillations and acoustic waves generated in the upper convection zone become nonlinear in the atmosphere and transform into shock waves. Interactions of shock waves, the formation of contact discontinuities, and interactions of shocks with these discontinuities will occur. The strong nonlinear dyn...

The transition from the large-amplitude rapidly-decaying regime of kink oscillations plasma loops observed in corona Sun to low-amplitude decayless is modelled. In this study, associated with energy supply coronal flows, i.e., self-oscillations, or random movements footpoints oscillating loop. damping attributed linear effect resonant absorption. We demonstrate that decay an impulsively excited...

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Asteroseismology, that is, the use of frequency content a time series caused by variations in brightness or radial velocity stellar object, is based on hypothesis such harmonic and therefore can be described sum sines cosines. If this were not case (e.g., oscillations an ellipsoid revolution) it cannot guaranteed Discrete Fourier transform least squares approximation to series. This report stud...

In time-distance helioseismology, the time signals (Doppler shifts) at two points on the solar surface, separated by a fixed angular distance are crosscorrelated, and this leads to a wave packet signal. Accurately measuring the travel times of these wave packets is crucial for inferring the sub-surface properties in the Sun. The observed signal is quite noisy, and to improve the signal-tonoise ...

We investigate the behavior of the intermediate-degree mode frequencies of the sun during the current extended minimum phase to explore the time-varying conditions in the solar interior. Using contemporaneous helioseismic data from GONG and MDI, we find that the changes in resonant mode frequencies during the activity minimum period are significantly greater than the changes in solar activity a...