Search Results - "Fedun, Viktor"

Vortex Flows in the Solar Atmosphere: Automated Identification and Statistical Analysis by Giagkiozis, Ioannis, Fedun, Viktor, Scullion, Eamon, Jess, David B., Verth, Gary

“…Vortices on the photosphere are fundamentally important as these coherent flows have the potential to form coherent magnetic field structures in the solar…”
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Magnetohydrodynamic Poynting Flux Vortices in the Solar Atmosphere and Their Role in Concentrating Energy by Silva, Suzana S. A., Verth, Gary, Rempel, Erico L., Ballai, Istvan, Jafarzadeh, Shahin, Fedun, Viktor

“…Abstract The nature of energy generation, transport, and effective dissipation responsible for maintaining a hot solar upper atmosphere is still elusive. The…”
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Poynting Flux of MHD Modes in Magnetic Solar Vortex Tubes by Skirvin, Samuel J., Fedun, Viktor, Goossens, Marcel, Silva, Suzana S. A., Verth, Gary

“…Abstract Magnetic flux tubes in the presence of background rotational flows, known as solar vortex tubes, are abundant throughout the solar atmosphere and may…”
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On the Stabilization of a Twisted Magnetic Flux Tube by Tsap, Yuriy, Fedun, Viktor, Cheremnykh, Oleg, Stepanov, Alexander, Kryshtal, Alexandr, Kopylova, Yulia

“…Abstract The linear magnetohydrodynamic stability of a shielding magnetic flux rope with a surface current under coronal solar conditions is analyzed in the…”
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Advanced Γ Method for Small-scale Vortex Detection in the Solar Atmosphere by Yuan, Yuyang, de Souza e Almeida Silva, Suzana, Fedun, Viktor, Kitiashvili, Irina N., Verth, Gary

“…Abstract Ubiquitous vortical structures are considered to act as a natural source of various solar plasma phenomena, for example, a wide range of…”
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Solar Vortex Tubes. III. Vorticity and Energy Transport by Silva, Suzana S. A., Verth, Gary, Ballai, Istvan, Rempel, Erico L., Shelyag, Sergiy, Schiavo, Luiz A. C. A., Gomes, Tiago F. P., Fedun, Viktor

“…Abstract This study investigated the mechanisms of vorticity generation and the role of vortex tubes in plasma heating and energy transport. Vortex tubes were…”
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Modeling the Effects of a Light Bridge on Properties of Magnetohydrodynamic Waves in Solar Pores by Schiavo, Luiz A. C. A., Gordovskyy, Mykola, Browning, Philippa K., de Souza e Almeida Silva, Suzana, Verth, Gary, Ballai, Istvan, Shelyag, Sergiy, Ruzheinikov, Sergey N., McLaughlin, James A., Fedun, Viktor

“…Abstract Solar pores are ideal magnetic structures for wave propagation and transport of energy radially outwards across the upper layers of the solar…”
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SunbYte: an autonomous pointing framework for low-cost robotic solar telescopes on high altitude balloons by Cho, Yun-Hang, Heung, Gianni, Bobrov, Yakov, Middleton, Joseph, Brownlow, Josh, Verth, Gary, Fedun, Viktor

“…The design and usability of a fully autonomous robotic control system (SunbYte - Sheffield University Balloon “lYfted” TElescope) for solar tracking and…”
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Generation of Low-Frequency Kinetic Waves at the Footpoints of Pre-Flare Coronal Loops by Kryshtal, Alexandr, Voitsekhovska, Anna, Cheremnykh, Oleg, Ballai, Istvan, Verth, Gary, Fedun, Viktor

“…In this study we discuss the excitation of low-frequency plasma waves in the lower-middle chromosphere region of loop footpoints for the case when the plasma…”
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Transient Effects in Atmosphere and Ionosphere Preceding the 2015 M7.8 and M7.3 Gorkha–Nepal Earthquakes by Ouzounov, Dimitar, Pulinets, Sergey, Davidenko, Dmitry, Rozhnoi, Alexandr, Solovieva, Maria, Fedun, Viktor, Dwivedi, B N, Rybin, Anatoly, Kafatos, Menas, Taylor, Patrick

“…We analyze retrospectively/prospectively the transient variations of six different physical parameters in the atmosphere/ionosphere during the M7.8 and M7.3…”
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Generation of Localised Vertical Streams in Unstable Stratified Atmosphere by Onishchenko, Oleg, Fedun, Viktor, Ballai, Istvan, Kryshtal, Aleksandr, Verth, Gary

“…A new model of axially symmetric concentrated vortex generation was developed herein. In this work, the solution of a nonlinear equation for internal gravity…”
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Slow Body MHD Waves in Inhomogeneous Photospheric Waveguides by Ballai, Istvan, Asiri, Fisal, Fedun, Viktor, Verth, Gary, gács-Dajka, Emese, Albidah, Abdulrahman B

“…The present study deals with the investigation of the oscillatory morphology of guided slow body MHD modes in inhomogeneous magnetic waveguides that appear in…”
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Turbulent dipolarization regions in the Earth’s magnetotail: ion fluxes and magnetic field changes by Kozak, Liudmyla, Kronberg, Elena A., Petrenko, Bohdan, Blöcker, Aljona, Akhmetshyn, Roman, Ballai, Istvan, Fedun, Viktor

“…In this work, we consider the dynamics of ion fluxes and magnetic field changes in turbulent regions of magnetotail dipolarizations. The data from the…”
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Dust Devils: Structural Features, Dynamics and Climate Impact by Oleg Onishchenko, Viktor Fedun, Wendell Horton, Oleg Pokhotelov, Gary Verth

“…According to modern concepts, the main natural sources of dust in the atmosphere are dust storms and associated dust devils—rotating columns of rising dust…”
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The Stationary Concentrated Vortex Model by Oleg Onishchenko, Viktor Fedun, Wendell Horton, Oleg Pokhotelov, Natalia Astafieva, Samuel J. Skirvin, Gary Verth

“…A new model of an axially-symmetric stationary concentrated vortex for an inviscid incompressible flow is presented as an exact solution of the Euler…”
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Ionospheric perturbations related to the earthquake in Vrancea area on November 22, 2014, as detected by electromagnetic VLF/LF frequency signals by Maria Solovieva, Alexander Rozhnoi, Viktor Fedun, Konrad Schwingenschuh, Masashi Hayakawa

“…Data from the European network of very low/ low frequency (VLF/LF) receivers has been used to study the response of the lower ionosphere to the earthquake of…”
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Ground-based acoustic parametric generator impact on the atmosphere and ionosphere in an active experiment by Rapoport, Yuriy G, Cheremnykh, Oleg K, Koshovy, Volodymyr V, Melnik, Mykola O, Ivantyshyn, Oleh L, Nogach, Roman T, Selivanov, Yuriy A, Grimalsky, Vladimir V, Mezentsev, Valentyn P, Karataeva, Larysa M, Ivchenko, Vasyl M, Milinevsky, Gennadi P, Fedun, Viktor N, Tkachenko, Eugen N

“…We develop theoretical basics of active experiments with two beams of acoustic waves, radiated by a ground-based sound generator. These beams are transformed…”
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Changes in turbulent processes caused by atmospheric gravity waves from troposphere by Kozak, Liudmyla, Ballai, Istvan, Fedun, Viktor, Kronberg, Elena A., Bloecker, Aljona, Petrenko, Bohdan

“…We have determined that changes in temperature and wind speed recorded in the Earth‘s upper atmosphere above tropospheric sources (hurricanes) can be explained…”
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THE NONLINEAR EVOLUTION OF A TWIST IN A MAGNETIC SHOCKTUBE by Williams, Thomas, Taroyan, Youra, Fedun, Viktor

“…ABSTRACT The interaction between a small twist and a horizontal chromospheric shocktube is investigated. The magnetic flux tube is modeled using 1.5-D…”
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Magnetic tornadoes as energy channels into the solar corona by Wedemeyer-Böhm, Sven, Scullion, Eamon, Steiner, Oskar, van der Voort, Luc Rouppe, de la Cruz Rodriguez, Jaime, Fedun, Viktor, Erdélyi, Robert

“…Rotating magnetic structures in the Sun can channel energy outwards from the convection zone and may explain how the energy required to heat the outer layers…”
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