Zobrazeno 1 - 10
of 187
pro vyhledávání: '"V, Fedun"'
Autor:
O., Cheremnykh, A., Fedorenko, A., Voitsekhovska, Yu., Selivanov, I., Ballai, G., Verth, V, Fedun
The perturbations from the solar terminator in the range of acoustic-gravity waves (AGWs) periods from 5 minutes to 1 hour were analysed with the use of measurements of VLF radio signals amplitudes on the European radio path GQD--A118 (Great Britain-
Externí odkaz:
http://arxiv.org/abs/2310.05961
Autor:
S. S. A. Silva, M. Lennard, G. Verth, I. Ballai, E. L. Rempel, J. Warnecke, H. Iijima, H. Hotta, S.-H. Park, A. C. Donea, K. Kusano, V. Fedun
Publikováno v:
The Astrophysical Journal Letters, Vol 948, Iss 2, p L24 (2023)
One key aspect of understanding the solar dynamo mechanism and the evolution of solar magnetism is to properly describe the emergence of solar active regions. In this Letter, we describe the Lagrangian photospheric flows dynamics during a simulated f
Externí odkaz:
https://doaj.org/article/d8ad25c8286e487489b3c53d2828bd53
Publikováno v:
Annales Geophysicae, Vol 40, Pp 55-65 (2022)
The Detection of Ionosphere Anomalies (DIA) software was developed and used for ionosphere research in the Institute of Space Technique and Technology of the National Center of Space Research and Technology (Almaty, Republic of Kazakhstan). The softw
Externí odkaz:
https://doaj.org/article/77bed8a228b14d56a2da0300e80f30e8
Autor:
M. Stangalini, G. Verth, V. Fedun, A. A. Aldhafeeri, D. B. Jess, S. Jafarzadeh, P. H. Keys, B. Fleck, J. Terradas, M. Murabito, I. Ermolli, R. Soler, F. Giorgi, C. D. MacBride
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-9 (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
Externí odkaz:
https://doaj.org/article/952e2ef171e14b3699ab21cb2b338433
Publikováno v:
The Astrophysical Journal, Vol 958, Iss 1, p 81 (2023)
The phase mixing of Alfvén waves is one of the most promising mechanisms for the heating of the solar atmosphere. The damping of waves in this case requires small transversal scales, relative to the magnetic field direction; this requirement is achi
Externí odkaz:
https://doaj.org/article/3d486edd0bd049b28a58162e74a97a6f
Autor:
A. B. Albidah, V. Fedun, A. A. Aldhafeeri, I. Ballai, D. B. Jess, W. Brevis, J. Higham, M. Stangalini, S. S. A. Silva, C. D. MacBride, G. Verth
Publikováno v:
The Astrophysical Journal, Vol 954, Iss 1, p 30 (2023)
Through their lifetime, sunspots undergo a change in their area and shape and, as they decay, they fragment into smaller structures. Here, for the first time we analyze the spatial structure of the magnetohydrodynamic (MHD) slow-body and fast-surface
Externí odkaz:
https://doaj.org/article/29d4dbe4ed9e43e1949e37abc5d7f19e
Autor:
Y. Rapoport, V. Grimalsky, V. Fedun, O. Agapitov, J. Bonnell, A. Grytsai, G. Milinevsky, A. Liashchuk, A. Rozhnoi, M. Solovieva, A. Gulin
Publikováno v:
Annales Geophysicae, Vol 38, Pp 207-230 (2020)
The modeling of very low-frequency (VLF) electromagnetic (EM) beam propagation in the Earth–ionosphere waveguide (WGEI) is considered. A new tensor impedance method for modeling the propagation of electromagnetic beams in a multi-layered and inhomo
Externí odkaz:
https://doaj.org/article/0f5b70da4c2247e2bf0a514c84a06e67
Autor:
A. Rozhnoi, M. Solovieva, V. Fedun, P. Gallagher, J. McCauley, M. Y. Boudjada, S. Shelyag, H. U. Eichelberger
Publikováno v:
Annales Geophysicae, Vol 37, Pp 843-850 (2019)
In this paper we analysed sudden phase anomalies (SPAs) of VLF–LF signals recorded at Graz (Austria), Birr (Ireland) and Moscow (Russia) stations during two strong solar flares in September 2017. The first X-class 9.3 flare occurred on 6 September
Externí odkaz:
https://doaj.org/article/b054c0f84bb14148b5b34b29baf8ff04
Publikováno v:
Experimental Astronomy. 54:317-334
Magnetism dominates the structure and dynamics of the solar corona. To understand the true nature of the solar corona and the long-standing coronal heating problem requires measuring the vector magnetic field of the corona at a sufficiently high reso
Autor:
A. Rozhnoi, M. Solovieva, S. Shalimov, D. Ouzounov, P. Gallagher, G. Verth, J. McCauley, S. Shelyag, V. Fedun
Publikováno v:
Earth and Space Science, Vol 7, Iss 2, Pp n/a-n/a (2020)
Abstract An experimental study of the phase and amplitude observations of sub‐ionospheric very low and low frequency (VLF/LF) signals is performed to analyze the response of the lower ionosphere during the 21 August 2017 total solar eclipse in the
Externí odkaz:
https://doaj.org/article/24f3f60e73cc477da0d5adaf2969a611