Dr Istvan Ballai

School of Mathematical and Physical Sciences

Senior Lecturer in Applied Mathematics

i.ballai@sheffield.ac.uk
+44 114 222 3833

Full contact details

Dr Istvan Ballai
School of Mathematical and Physical Sciences
H9
Hicks Building
Hounsfield Road
ºù«Ӱҵ
S3 7RH
Research interests

Dr. Istvan Ballai's main research interest is in linear and nonlinear MagnetoHydroDynamics (MHD) waves occurring in solar and interplanetary plasmas.

Waves can carry energy and momentum; when transferred to inhomogeneous plasmas they can heat or accelerate the plasma therefore MHD waves may play an important role in explaining the observed high temperatures in the solar corona. Waves can transport information about the environment in which they propagate, so they can serve as a perfect tool for plasma diagnostics. In this context I use local and global coronal waves to find average values for magnetic field and transport coefficients in the solar corona. 

When the temperature of the plasma is not high enough to ensure a full ionisation, the plasma becomes partially ionised with particles of different species colliding and modifying each other momentum and energy. My research focusses on the properties of linear and nonlinear waves in partially ionised plasmas, as well the stability of dynamical changes occurring in these environments.

Publications

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All publications

Journal articles

  • Silva SSA, Verth G, Ballai I, Rempel EL, Shelyag S, Schiavo LACA, Gomes TFP & Fedun V (2024) . The Astrophysical Journal, 975(1), 118-118. RIS download Bibtex download
  • Schiavo LACA, Gordovskyy M, Browning PK, de Souza e Almeida Silva S, Verth G, Ballai I, Shelyag S, Ruzheinikov SN, McLaughlin JA & Fedun V (2024) . The Astrophysical Journal, 975(1), 45-45. RIS download Bibtex download
  • Kozak L, Ballai I, Fedun V, Kronberg EA, Bloecker A & Petrenko B (2024) . Journal of Atmospheric and Solar-Terrestrial Physics, 106364-106364. RIS download Bibtex download
  • Ballai I, Forgács-Dajka E & McMurdo M (2024) . Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 382(2272). RIS download Bibtex download
  • Asiri F, Ballai I, Fedun V, Verth G, Ruzheinikov SN & Albidah AB (2024) . Monthly Notices of the Royal Astronomical Society, 529(1), 748-760. RIS download Bibtex download
  • Silva SSA, Verth G, Rempel EL, Ballai I, Jafarzadeh S & Fedun V (2024) . The Astrophysical Journal, 963(1), 10-10. RIS download Bibtex download
  • McMurdo M, Ballai I, Verth G, Alharbi A & Fedun V (2023) . The Astrophysical Journal, 958(1), 81-81. RIS download Bibtex download
  • Albidah AB, Fedun V, Aldhafeeri AA, Ballai I, Jess DB, Brevis W, Higham J, Stangalini M, Silva SSA, MacBride CD & Verth G (2023) . The Astrophysical Journal, 954(1), 30-30. RIS download Bibtex download
  • Cheremnykh O, Fedorenko A, Voitsekhovska A, Selivanov Y, Ballai I, Verth G & Fedun V (2023) . Advances in Space Research. RIS download Bibtex download
  • Silva SSA, Lennard M, Verth G, Ballai I, Rempel EL, Warnecke J, Iijima H, Hotta H, Park S-H, Donea AC , Kusano K et al (2023) . The Astrophysical Journal Letters, 948(2). RIS download Bibtex download
  • Kontar E & Ballai I (2022) . Advances in Space Research. RIS download Bibtex download
  • Aldhafeeri AA, Verth G, Fedun V, Lennard M & Ballai I (2022) . The Astrophysical Journal, 938(1), 32-32. RIS download Bibtex download
  • Skirvin S, Verth G, González-Avilés JJ, Shelyag S, Sharma R, Guzmán FS, Ballai I, Scullion E, Silva SSA & Fedun V (2022) . Advances in Space Research. RIS download Bibtex download
  • Aldhafeeri A, Fedun V, Ballai I & Verth G (2022) . RIS download Bibtex download
  • Aljohani Y, Fedun V, Ballai I, Silva SSA, Shelyag S & Verth G (2022) . The Astrophysical Journal, 928(1), 3-3. RIS download Bibtex download
  • Albidah AB, Fedun V, Aldhafeeri AA, Ballai I, Brevis W, Jess DB, Higham J, Stangalini M, Silva SSA & Verth G (2022) . The Astrophysical Journal, 927(2), 201-201. RIS download Bibtex download
  • Silva SSA, Murabito M, Jafarzadeh S, Stangliani M, Verth G, Ballai I & Fedun V (2022) . The Astrophysical Journal, 927(2). RIS download Bibtex download
  • Alharbi A, Ballai I, Fedun V & Verth G (2022) . Monthly Notices of the Royal Astronomical Society, 511(4), 5274-5286. RIS download Bibtex download
  • Petrenko B, Kozak L, Kronberg E & Ballai I (2022) . Bulletin of Taras Shevchenko National University of Kyiv. Astronomy(66), 20-25. RIS download Bibtex download
  • Rast MP, Bello González N, Bellot Rubio L, Cao W, Cauzzi G, DeLuca E, De Pontieu B, Fletcher L, Gibson SE, Judge PG , Katsukawa Y et al (2021) . Solar Physics, 296(4). RIS download Bibtex download
  • Albidah AB, Brevis W, Fedun V, Ballai I, Jess DB, Stangalini M, Higham J & Verth G (2021) . Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 379(2190). RIS download Bibtex download
  • Alharbi A, Ballai I, Fedun V & Verth G (2020) . Monthly Notices of the Royal Astronomical Society, 501(2), 1940-1950. RIS download Bibtex download
  • Kryshtal A, Voitsekhovska A, Cheremnykh O, Ballai I, Verth G & Fedun V (2020) . Solar Physics, 295(12). RIS download Bibtex download
  • Ballai I (2020) . Astronomy & Astrophysics, 635. RIS download Bibtex download
  • Vickers E, Ballai I & Erdélyi R (2020) . Astronomy and Astrophysics. RIS download Bibtex download
  • Ballai I (2019) . Frontiers in Astronomy and Space Sciences, 6. RIS download Bibtex download
  • Ruderman MS, Vickers E, Ballai I & Erdelyi R (2018) . Physics of Plasmas, 25(12). RIS download Bibtex download
  • Ballai I, Forgacs-Dajka E & Marcu A (2018) . Advances in Space Research. RIS download Bibtex download
  • Vickers E, Ballai I & Erdélyi R (2018) . Solar Physics, 293. RIS download Bibtex download
  • Ruderman MS, Ballai I, Khomenko E & Collados M (2018) . Astronomy & Astrophysics, 609, A23-A23. RIS download Bibtex download
  • Mather JF, Ballai I & Erdélyi R (2018) . Astronomy & Astrophysics, 610, A56-A56. RIS download Bibtex download
  • Ballai I, Pinter B, Oliver R & Alexandrou M (2017) . Astronomy & Astrophysics. RIS download Bibtex download
  • Gyenge N, Ballai I & Baranyi T (2016) . Monthly Notices of the Royal Astronomical Society, 459(4), 3532-3539. RIS download Bibtex download
  • Ballai I, Oliver R & Alexandrou M (2015) . Astronomy & Astrophysics, 577, A82-A82. RIS download Bibtex download
  • Orza B & Ballai I (2013) . Astronomische Nachrichten, 334(9), 948-951. RIS download Bibtex download
  • Ballai I, Forgacs-Dajka E & Douglas M (2011) . ASTRON ASTROPHYS, 527. RIS download Bibtex download
  • Ballai I & Forgács-Dajka E (2010) . Journal of Physics: Conference Series, 218(1). RIS download Bibtex download
  • Clack CTM & Ballai I (2009) . PHYS PLASMAS, 16(7). RIS download Bibtex download
  • Clack CTM & Ballai I (2009) . PHYS PLASMAS, 16(4). RIS download Bibtex download
  • Clack CTM, Ballai I & Ruderman MS (2009) . ASTRON ASTROPHYS, 494(1), 317-327. RIS download Bibtex download
  • Mocanu G, Marcu A, Ballai I & Orza B (2008) . ASTRON NACHR, 329(8), 780-785. RIS download Bibtex download
  • Ballai I, Douglas M & Marcu A (2008) . ASTRON ASTROPHYS, 488(3), 1125-1132. RIS download Bibtex download
  • Clack CTM & Ballai I (2008) . PHYS PLASMAS, 15(8). RIS download Bibtex download
  • Douglas M & Ballai I (2007) MHD waves at a spherical interface modelling EIT waves. ASTRON NACHR, 328(8), 769-772. RIS download Bibtex download
  • Ballai I, Forgacs-Dajka E & Marcu A (2007) Dispersive shock waves in the solar wind. ASTRON NACHR, 328(8), 734-737. RIS download Bibtex download
  • Forgacs-Dajka E, Ballai I & van Driel-Gesztelyi L (2007) Untitled. ASTRON NACHR, 328(8), 725-725. RIS download Bibtex download
  • Erdelyi R & Ballai I (2007) Heating of the solar and stellar coronae: a review. ASTRON NACHR, 328(8), 726-733. RIS download Bibtex download
  • Marcu A & Ballai I (2007) Thermosolutal stability of a two-component rotating plasma with finite Larmor radius. PROC ROM ACAD SER A, 8(2), 111-120. RIS download Bibtex download
  • Marcu A, Ballai I & Orza B (2007) . Proceedings of the International Astronomical Union, 3(S247), 320-323. RIS download Bibtex download
  • Douglas M & Ballai I (2007) MHD waves at a spherical interface modelling coronal global EIT waves. Proceedings of the International Astronomical Union, 3(S247), 251-254. RIS download Bibtex download
  • Ballai I & Douglas M (2007) . Proceedings of the International Astronomical Union, 3(S247), 243-250. RIS download Bibtex download
  • Ballai I (2007) . AIP Conference Proceedings, 934, 44-53. RIS download Bibtex download
  • Marcu A & Ballai I (2006) The damping of slow magnetoacustic waves in coronal loops. J OPTOELECTRON ADV M, 8(4), 1562-1564. RIS download Bibtex download
  • Marcu A, Ballai I & Pinter B (2006) . ASTRON ASTROPHYS, 449(3), 1193-1202. RIS download Bibtex download
  • Ballai I, Erdelyi R & Hargreaves J (2006) . PHYS PLASMAS, 13(4). RIS download Bibtex download
  • Cally PS, De Moortel I & Ballai I (2006) Untitled. PHILOS T ROY SOC A, 364(1839), 471-472. RIS download Bibtex download
  • Ballai I (2006) . Proceedings of the International Astronomical Union, 2(233), 132-133. RIS download Bibtex download
  • De Moortel I, Cally PS & Ballai I (2006) . Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 364(1839), 461-472. RIS download Bibtex download
  • Ballai I, Erdelyi R & Pinter B (2005) On the nature of coronal EIT waves. ASTROPHYS J, 633(2), L145-L148. RIS download Bibtex download
  • Chaplin WJ & Ballai I (2005) The sound of the Sun. ASTRON GEOPHYS, 46(4), 27-30. RIS download Bibtex download
  • Ballai I & Chaplin B (2005) Seismology of the sun: From the inner core to the corona. Observatory, 125(1187), 224-227. RIS download Bibtex download
  • Ballai I (2004) . Astronomy and Geophysics, 45(4), 4.44-4.45. RIS download Bibtex download
  • Ballai I & Marcu A (2004) . ASTRON ASTROPHYS, 415(2), 691-703. RIS download Bibtex download
  • Ballai I (2004) Damping of compressional waves in coronal prominences. European Space Agency, (Special Publication) ESA SP(547), 211-214. RIS download Bibtex download
  • Ballai I & Erdélyi R (2004) Damping of coronal EIT waves as a tool for plasma diagnostics. European Space Agency, (Special Publication) ESA SP(547), 433-440. RIS download Bibtex download
  • Ballai I (2003) . ASTRON ASTROPHYS, 410(2), L17-L19. RIS download Bibtex download
  • Terra-Homem M, Erdelyi R & Ballai I (2003) Linear and non-linear MHD wave propagation in steady-state magnetic cylinders. SOL PHYS, 217(2), 199-223. RIS download Bibtex download
  • Ballai I, Thelen JC & Roberts B (2003) . ASTRON ASTROPHYS, 404(2), 701-707. RIS download Bibtex download
  • Ballai I & Zhugzhda YD (2002) . PHYS PLASMAS, 9(10), 4280-4284. RIS download Bibtex download
  • Ballai I, Erdelyi R & Roberts B (2002) Ducted compressional waves in the magnetosphere in the double-polytropic approximation. ANN GEOPHYS-GERMANY, 20(10), 1553-1558. RIS download Bibtex download
  • Ballai I, Erdelyi R, Voitenko Y & Goossens M (2002) . PHYS PLASMAS, 9(6), 2593-2603. RIS download Bibtex download
  • Erdelyi R & Ballai I (2002) Dynamics of nonlinear resonant slow MHD waves in twisted flux tubes. NONLINEAR PROC GEOPH, 9(2), 79-86. RIS download Bibtex download
  • Ballai I & Erdelyi R (2002) . J PLASMA PHYS, 67, 79-97. RIS download Bibtex download
  • Erdelyi R, Ballai I & Goossens M (2001) Nonlinear resonant absorption of fast magnetoacoustic waves due to coupling into slow continue in the solar atmosphere. ASTRON ASTROPHYS, 368(2), 662-675. RIS download Bibtex download
  • Ballai I, Erdelyi R & Goossens M (2000) Nonlinear theory of non-axisymmetric resonant slow waves in straight magnetic flux tubes. J PLASMA PHYS, 64, 579-599. RIS download Bibtex download
  • Ballai I, Erdelyi R & Goossens M (2000) Linear and nonlinear resonant interaction of sound waves in dissipative layers. J PLASMA PHYS, 64, 235-247. RIS download Bibtex download
  • Erdelyi R & Ballai I (1999) Resonant absorption of nonlinear slow MHD waves in isotropic steady plasmas - II. Application: Resonant acoustic waves. SOL PHYS, 186(1-2), 67-97. RIS download Bibtex download
  • Ballai I & Erdelyi R (1998) Resonant absorption of nonlinear slow MHD waves in isotropic steady plasmas - I. Theory. SOL PHYS, 180(1-2), 65-79. RIS download Bibtex download
  • Ballai I, Erdelyi R & Ruderman MS (1998) Interaction of sound waves with slow dissipative layers in anisotropic plasmas in the approximation of weak nonlinearity. PHYS PLASMAS, 5(6), 2264-2273. RIS download Bibtex download
  • Ballai I, Ruderman MS & Erdelyi R (1998) Nonlinear theory of slow dissipative layers in anisotropic plasmas. PHYS PLASMAS, 5(1), 252-260. RIS download Bibtex download
  • Ballai I, Asiri F, Fedun V, Verth G, Forgács-Dajka E & Albidah AB () . Universe, 10(8), 334-334. RIS download Bibtex download
  • Jafarzadeh S, Schiavo LAC, Fedun V, Solanki SK, Stangalini M, Calchetti D, Verth G, Jess DB, Grant SDT, Ballai I , Gafeira R et al () . Astronomy & Astrophysics. RIS download Bibtex download
  • Kozak L, Kronberg EA, Petrenko B, Blöcker A, Akhmetshyn R, Ballai I & Fedun V () . Frontiers in Astronomy and Space Sciences, 10, 1226200. RIS download Bibtex download
  • Caspi A, Seaton D, Casini R, Downs C, Gibson S, Gilbert H, Glesener L, Guidoni S, Hughes JM, McKenzie D , Plowman J et al () . Vol. 55, Issue 3 (Heliophysics 2024 Decadal Whitepapers), 55(3). RIS download Bibtex download
  • Onishchenko O, Fedun V, Ballai I, Kryshtal A & Verth G () . Fluids, 6(12), 454-454. RIS download Bibtex download
  • Balázs LG, Gyenge N, Korsós MB, Baranyi T, Forgács-Dajka E & Ballai I () . MNRAS, 441, 1157-1165. RIS download Bibtex download
  • Murawski K, Ballai I, Srivastava AK & Lee D () . RIS download Bibtex download
  • Pardi A-L, Ballai I, Marcu A & Orza B () . 2013SoPh..tmp..229P. RIS download Bibtex download
  • Ballai I & Orza B () . RIS download Bibtex download
  • Orza B, Ballai I, Jain R & Murawski K () . RIS download Bibtex download
  • Ballai I, Jess DB & Douglas M () . RIS download Bibtex download
  • Ballai I & Ruderman M () . RIS download Bibtex download
  • Clack CTM, Ballai I & Douglas M () . Solar Physics 06/2010. RIS download Bibtex download
  • Terradas J, Goossens M & Ballai I () . RIS download Bibtex download
  • Forgács-Dajka E, Dobos L & Ballai I () . Astronomy and Astrophysics. RIS download Bibtex download

Conference proceedings papers

  • Kozak L, Petrenko B, Kronberg E, Akhmetshyn R & Ballai I (2023) . EGU General Assembly 2023. Vienna, Austria, 23 April 2023 - 23 April 2023. RIS download Bibtex download
  • Cho Y-H, Lim J, Kalra A, Nair V, Rontogiannis G, Seniuc I-V, Schiona A, Narayanankutty G, Ioannou K, Lennard MG , Appleby B et al (2019) ºù«Ӱҵ University Nova Rocket Innovative Design Engineering (SUNRIDE). 24th ESA Symposium on European Rocket and Balloon Programmes and Related Research Proceedings (pp 122-127). Noordwijk, The Netherlands, 16 June 2019 - 20 June 2019. RIS download Bibtex download
  • Ballai I (2007) . SOLAR PHYSICS, Vol. 246(1) (pp 177-185) RIS download Bibtex download
  • Marcu A & Ballai I (2007) Thermally damped waves in the solar corona. FLOWS, BOUNDARIES, INTERACTIONS, Vol. 934 (pp 64-70) RIS download Bibtex download
  • Ballai I (2007) MHD waves in stratified and dissipative plasmas. Fifty Years of Romanian Astrophysics, Vol. 895 (pp 141-146) RIS download Bibtex download
  • Ballai I (2006) . First International Workshop and Summer School on Plasma Physics, Vol. 44 (pp 20-29) RIS download Bibtex download
  • Ballai I, Thelen JC & Roberts B (2002) Wave damping in hall plasmas - Application to the solar wind. SOLMAG 2002: PROCEEDINGS OF THE MAGNETIC COUPLING OF THE SOLAR ATMOSPHERE EUROCONFERENCE AND IAU COLLOQUIUM 188, Vol. 505 (pp 345-348) RIS download Bibtex download
  • Ballai I, Erdelyi R & Goossens M (2000) Linear and nonlinear waves in dilute plasmas. WAVES IN DUSTY, SOLAR, AND SPACE PLASMAS, Vol. 537 (pp 152-159) RIS download Bibtex download
  • Ballai I, Erdelyi R & Goossens M (2000) Absorption of fast magnetosonic waves in the solar atmosphere in the limit of weak nonlinearity. WAVES IN DUSTY, SOLAR, AND SPACE PLASMAS, Vol. 537 (pp 144-151) RIS download Bibtex download
  • Erdelyi R, Ballai I & Ruderman MS (1999) Strongly nonlinear resonant MHD waves in the steady solar magnetic canopy. 9TH EUROPEAN MEETING ON SOLAR PHYSICS: MAGNETIC FIELDS AND SOLAR PROCESSES, VOLS 1 AND 2, Vol. 448 (pp 263-267) RIS download Bibtex download
  • Ballai I & Erdelyi R (1999) Nonlinear resonant MHD waves in the atmosphere of the sun. 8TH SOHO WORKSHOP: PLASMA DYNAMICS AND DIAGNOSTICS IN THE SOLAR TRANSITION REGION AND CORONA, PROCEEDINGS, Vol. 446 (pp 155-160) RIS download Bibtex download

Preprints

  • Schiavo LACA, Gordovskyy M, Browning PK, Silva SSA, Verth G, Ballai I, Shelyag S, Ruzheinikov SN, McLaughlin JA & Fedun V (2024) Modeling the effects of a lightbridge on oscillations in a solar pore. RIS download Bibtex download
  • Jafarzadeh S, Schiavo LAC, Fedun V, Solanki SK, Stangalini M, Calchetti D, Verth G, Jess DB, Grant SDT, Ballai I , Gafeira R et al (2024) Sausage, kink, and fluting MHD wave modes identified in solar magnetic pores by Solar Orbiter/PHI, arXiv. RIS download Bibtex download
  • McMurdo M, Ballai I, Verth G, Alharbi A & Fedun V (2023) Phase mixing of propagating Alfv{é}n waves in a single-fluid partially ionized solar plasma. RIS download Bibtex download
  • O. C, A. F, A. V, Yu. S, I. B, G. V & V F (2023) Atmospheric waves disturbances from the solar terminator according to the VLF radio stations data, arXiv. RIS download Bibtex download
  • Albidah AB, Fedun V, Aldhafeeri AA, Ballai I, Jess DB, Brevis W, Higham J, Stangalini M, Silva SSA, MacBride CD & Verth G (2023) The temporal and spatial evolution of MHD wave modes in sunspots. RIS download Bibtex download
  • Aldhafeeri A, Verth G, Fedun V, Lennard M & Ballai I (2022) Comparison of exact and approximate MHD slow body mode solutions in photospheric waveguides, arXiv. RIS download Bibtex download
  • Skirvin S, Verth G, González-Avilés JJ, Shelyag S, Sharma R, Guzmán F, Ballai I, Scullion E, Silva SSA & Fedun V (2022) Small-scale solar jet formation and their associated waves and instabilities, arXiv. RIS download Bibtex download
  • Silva SSA, Murabito M, Jafarzadeh S, Stangliani M, Verth G, Ballai I & Fedun V (2022) The importance of horizontal Poynting flux in the solar photosphere, arXiv. RIS download Bibtex download
  • Aljohani Y, Fedun V, Ballai I, Silva SSA, Shelyag S & Verth G (2022) New approach for analysing dynamical processes on the surface of photospheric vortex tubes, arXiv. RIS download Bibtex download
  • Alharbi A, Ballai I, Fedun V & Verth G (2022) Waves in weakly ionised solar plasmas, arXiv. RIS download Bibtex download
  • Albidah AB, Fedun V, Aldhafeeri AA, Ballai I, Brevis W, Jess DB, Higham J, Stangalini M, Silva SSA & Verth G (2022) Magnetohydrodynamic wave mode identification in circular and elliptical sunspot umbrae: evidence for high order modes, arXiv. RIS download Bibtex download
  • Forgács-Dajka E, Dobos L & Ballai I (2021) Time-dependent properties of sunspot groups -- I. Lifetime and asymmetric evolution, arXiv. RIS download Bibtex download
  • Alharbi A, Ballai I, Fedun V & Verth G (2020) Slow magnetoacoustic waves in gravitationally stratified two-fluid plasmas in strongly ionised limit, arXiv. RIS download Bibtex download
  • Albidah AB, Brevis W, Fedun V, Ballai I, Jess DB, Stangalini M, Higham J & Verth G (2020) Proper Orthogonal and Dynamic Mode Decomposition of Sunspot Data, arXiv. RIS download Bibtex download
  • Rast MP, González NB, Rubio LB, Cao W, Cauzzi G, DeLuca E, De Pontieu B, Fletcher L, Gibson SE, Judge PG , Katsukawa Y et al (2020) Critical Science Plan for the Daniel K. Inouye Solar Telescope (DKIST), arXiv. RIS download Bibtex download
  • Ballai I (2020) Diagnostics of plasma ionisation using torsional Alfén waves, arXiv. RIS download Bibtex download
  • Vickers E, Ballai I & Erdélyi R (2019) Magnetic Rayleigh-Taylor Instability at a Contact Discontinuity With Oblique Magnetic Field, arXiv. RIS download Bibtex download
  • Ballai I, Forgacs-Dajka E & Marcu A (2018) Dispersive shock waves in partially ionised plasmas, arXiv. RIS download Bibtex download
  • Vickers E, Ballai I & Erdélyi R (2018) Propagation of Leaky MHD Waves at Discontinuities with Tilted Magnetic Field, arXiv. RIS download Bibtex download
  • Mather JF, Ballai I & Erdelyi R (2017) Dissipative instabilities in a partially ionised prominence plasma slab: II. The effect of compressibility, arXiv. RIS download Bibtex download
  • Ballai I, Pinter B, Oliver R & Alexandrou M (2017) Dissipative instability in a partially ionised prominence slab, arXiv. RIS download Bibtex download
  • Gyenge N, Ballai I & Baranyi T (2016) Statistical study of spatio-temporal distribution of precursor solar flares associated with major flares, arXiv. RIS download Bibtex download
  • Ballai I, Oliver R & Alexandrou M (2015) Dissipative instability in partially ionised prominence plasmas, arXiv. RIS download Bibtex download
  • Balázs LG, Gyenge N, Korsós MB, Baranyi T, Forgács-Dajka E & Ballai I (2014) Statistical relationship between the succeeding solar flares detected by the RHESSI satellite, arXiv. RIS download Bibtex download
  • Pardi A-L, Ballai I, Marcu A & Orza B (2013) Sausage Mode Propagation in a Thick Magnetic Flux Tube, arXiv. RIS download Bibtex download
  • Murawski K, Ballai I, Srivastava AK & Lee D (2013) Three-dimensional numerical simulation of magnetohydrodynamic-gravity waves and vortices in the solar atmosphere, arXiv. RIS download Bibtex download
  • Ballai I & Orza B (2012) Transverse kink oscillations of expanding coronal loops, arXiv. RIS download Bibtex download
  • Orza B, Ballai I, Jain R & Murawski K (2011) The effect of the environment on the P1/P2 period ratio for kink oscillations of coronal loops, arXiv. RIS download Bibtex download
  • Ballai I, Jess DB & Douglas M (2011) TRACE Observations of Driven Loop Oscillations, arXiv. RIS download Bibtex download
  • Ballai I & Ruderman M (2010) Nonlinear effects in resonant layers in solar and space plasmas, arXiv. RIS download Bibtex download
  • Clack CTM, Ballai I & Douglas M (2010) Resonant Absorption of Fast Magnetoacoustic Waves due to Coupling into the Slow and Alfven Continua in the Solar Atmosphere, arXiv. RIS download Bibtex download
  • Terradas J, Goossens M & Ballai I (2009) The effect of longitudinal flow on resonantly damped kink oscillations, arXiv. RIS download Bibtex download
  • Clack CTM & Ballai I (2009) Mean shear flows generated by nonlinear resonant Alfven waves, arXiv. RIS download Bibtex download
  • Clack C & Ballai I (2009) Nonlinear resonant absorption of fast magnetoacoustic waves in strongly anisotropic and dispersive plasmas, arXiv. RIS download Bibtex download
  • Clack CTM, Ballai I & Ruderman MS (2008) On the validity of nonlinear Alfven resonance in space plasmas, arXiv. RIS download Bibtex download
  • Clack C & Ballai I (2008) Nonlinear theory of resonant slow waves in anisotropic and dispersive plasmas, arXiv. RIS download Bibtex download
  • Ballai I, Douglas M & Marcu A (2008) Forced oscillations of coronal loops driven by EIT waves, arXiv. RIS download Bibtex download
  • Ballai I (2007) Global coronal seismology, arXiv. RIS download Bibtex download
Research group

Grants

Past grants, as Principal Investigator

Instabilities in partially ionized prominence plasmas Leverhulme
Damping of Forced Oscillations in Coronal Loops RS
Conference Attendance RS
Global Coronal Seismology Using SOHO/EIT Observations Nuffield

Past grants, as Coinvestigator

Application to STFC for Consolidated Grant Support for the Solar Physics and Space Plasma Research Centre (SP2RC) STFC
Consolidated Grant Support for the Solar Physics and Space Plasma Research Centre (SP2RC) STFC
Heating and Magneto-Seismology of the Solar Atmosphere STFC
Teaching interests
  • Differential and difference equations
  • Complex Analysis
  • Numerical methods