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- St Petersburg UniversityRU161 papers
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20 papers · 2 filters
Long-Period Oscillations of Sunspots Observed by SOHO/MDI
V. I. Efremov, L. D. Parfinenko, A. A. Solovev +1
We processed magnetograms that were obtained with the Michaelson Doppler Imager onboard the Solar and Heliospheric Observatory (SOHO/MDI). The results confirm the basic properties…
Supergranulation Velocity Field from the MDI (SOHO) Data
L. D. Parfinenko, V. I. Efremov, A. A. Solovev
Long (up to 100 hours) time series of SOHO/MDI Doppler data are analyzed. The power spectrum of radial velocity time series in the quiet photosphere is observed to have, along with…
Konus-Wind and Helicon-Coronas-F Observations of Solar Flares
V. D. Pal'shin, Yu. E. Charikov, R. L. Aptekar +7
Results of solar flare observations obtained in the Konus-Wind experiment from November, 1994 to December, 2013 and in the Helicon Coronas-F experiment during its operation from 20…
Identification of large-scale cellular structures on the Sun based on the SDO and PSPT data
V. I. Efremov, L. D. Parfinenko, A. A. Solovev
Three independent sets of data: i). series of filtergrams obtained in line CaII K (393.416 nm) with the ground-based telescope Precision Solar Photometric Telescope (PSPT) of Mauna…
New analytical and numerical models of solar coronal loop: I. Application to forced vertical kink oscillations
K. Murawski, A. Solov'ev, J. Kraskiewicz +1
Aims. We construct a new analytical model of a solar coronal loop that is embedded in a gravitationally stratified and magnetically confined atmosphere. On the basis of this analyt…
Evolution of fast magnetoacoustic pulses in randomly structured coronal plasmas
D. Yuan, D. J. Pascoe, V. M. Nakariakov +2
Magnetohydrodynamic waves interact with structured plasmas and reveal the internal magnetic and thermal structures therein, thereby having seismological applications in the solar a…