Results 21 to 30 of about 120,963 (192)
Low-frequency oscillations while magnetic storms as a tool to determine the types of solar plasma flows [PDF]
E3S Web of Conferences, 2020 Comparison of wavelet spectrum (skeletons) local maxima for disturbed components of solar plasma flow parameters and geomagnetic field disturbances recorded along the meridional station chain during geomagnetic storm intervals is performed in the range ...
Barkhatov N. A. +4 more
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Polarisation of decayless kink oscillations of solar coronal loops
Nature Communications, 2023 Decayless kink oscillations of plasma loops in the solar corona may contain an answer to the enigmatic problem of solar and stellar coronal heating. The polarisation of the oscillations gives us a unique information about their excitation mechanisms and ...
Sihui Zhong +6 more
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Intermediate Degree Solar Oscillations [PDF]
Symposium - International Astronomical Union, 1988 Spectra of solar intensity oscillations in the degree range ℓ = 20–98 were obtained with a 92% duty cycle over a 50 hour period from the geographic South Pole. After correction for solar rotation, the spectra have been averaged over azimuthal order m and fit with Lorentzian functions to provide values of background noise, amplitude, frequency and line ...
T. L. Duvall +2 more
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Scaling Relations for Solar-Like Oscillations: A Review
Frontiers in Astronomy and Space Sciences, 2020 The scaling relations for solar-like oscillations provide a translation of the features of the stochastic low-degree modes of oscillation in the Sun to predict the features of solar-like oscillations in other stars with convective outer layers.
Saskia Hekker, Saskia Hekker
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Transverse Vertical Oscillations During the Contraction and Expansion of Coronal Loops
The Astrophysical Journal, 2023 In this paper, we carry out a detailed analysis of the M1.6 class eruptive flare occurring in NOAA active region 13078 on 2022 August 19. The flare is associated with a fast coronal mass ejection (CME) propagating in the southwest direction with an ...
Qingmin Zhang +7 more
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Large scale coherent magnetohydrodynamic oscillations in a sunspot
Nature Communications, 2022 Co-existence of several magnetohydrodynamic oscillations modes on the Sun were predicted earlier. Here, the authors show large-scale coherent oscillations in a sunspot, with a spectrum different than solar global acoustic oscillations, incorporating a ...
M. Stangalini +13 more
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Quasivacuum solar neutrino oscillations [PDF]
Physical Review D, 2000 We discuss in detail solar neutrino oscillations with m^2/E in the range [10^-10,10^-7] eV^2/MeV. In this range, which interpolates smoothly between the so-called ``just-so'' and ``Mikheyev-Smirnov-Wolfenstein'' oscillation regimes, neutrino flavor transitions are increasingly affected by matter effects as m^2/E increases.
G. L. FOGLI +3 more
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Solar Activity and Solar Oscillations [PDF]
Symposium - International Astronomical Union, 1997 Helioseismology provides us with the tools to probe solar activity. So that we can consider how the solar oscillations are influenced by that activity, we first consider the phenomena that we associate with the active Sun. The surface of the Sun is not quiet but shows evidence of convection on a wide range of scales from a few hundred kilometres ...
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Geophysical Research Letters, 2022 Magnetospheric sawtooth oscillations are observed during strong and steady solar wind driving conditions. The simulation results of our global magnetohydrodynamics (MHD) model with embedded kinetic physics show that when the total magnetic flux carried ...
Xiantong Wang, Yuxi Chen, Gábor Tóth
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Proceedings of the International Astronomical Union, 2008 AbstractStudy of solar oscillations has provided us detailed information about solar structure and dynamics. These in turn provide a test of theories of stellar structure and evolution as well as theories of angular momentum transfer and dynamo. Some of these results about the solar structure and its implication on the recent revision of heavy element ...
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