Items where Author is "Botha, Gert"

Article

Karampelas, Konstantinos, McLaughlin, James, Botha, Gert and Regnier, Stephane (2023) Oscillatory Reconnection as a Plasma Diagnostic in the Solar Corona. The Astrophysical Journal, 943 (2). p. 131. ISSN 0004-637X

Lotz, S., Nel, A. E., Wicks, Robert, Roberts, O. W., Engelbrecht, N. E., Strauss, R. D., Botha, Gert, Kontar, E. P., Pitňa, A. and Bale, S. D. (2023) The Radial Variation of the Solar Wind Turbulence Spectra near the Kinetic Break Scale from Parker Solar Probe Measurements. The Astrophysical Journal, 942 (2). p. 93. ISSN 0004-637X

Karampelas, Konstantinos, McLaughlin, James, Botha, Gert and Regnier, Stephane (2022) The Independence of Oscillatory Reconnection Periodicity from the Initial Pulse. The Astrophysical Journal, 933 (2). p. 142. ISSN 0004-637X

Karampelas, Konstantinos, McLaughlin, James, Botha, Gert and Regnier, Stephane (2022) Oscillatory Reconnection of a 2D X-point in a hot coronal plasma. The Astrophysical Journal, 925 (2). p. 195. ISSN 0004-637X

Snow, Ben, Hillier, Andrew, Murtas, Giulia and Botha, Gert (2021) Shock identification and classification in 2D magnetohydrodynamiccompressible turbulence—Orszag–Tang vortex. Experimental Results, 2. e35. ISSN 2516-712X

Jess, David B., Snow, Ben, Houston, Scott J., Botha, Gert, Fleck, Bernhard, Krishna Prasad, S., Asensio Ramos, Andrés, Morton, Richard, Keys, Peter H., Jafarzadeh, Shahin, Stangalini, Marco, Grant, Samuel D. T. and Christian, Damian J. (2020) A chromospheric resonance cavity in a sunspot mapped with seismology. Nature Astronomy, 4. pp. 220-227. ISSN 2397-3366

McLaughlin, James, Thurgood, Jonathan, Botha, Gert and Wiggs, Joshua A. (2019) 3D WKB solution for fast magnetoacoustic wave behaviour within a separatrix dome containing a coronal null point. Monthly Notices of the Royal Astronomical Society, 484 (1). pp. 1390-1400. ISSN 0035-8711

Snow, Ben, Botha, Gert, Scullion, Eamon, McLaughlin, James, Young, Peter and Jaeggli, Sarah (2018) Predictions of DKIST/DL-NIRSP observations for an off-limb kink-unstable coronal loop. The Astrophysical Journal, 863 (2). p. 172. ISSN 0004-637X

Snow, Ben, Botha, Gert, McLaughlin, James and Hillier, Andrew (2018) Onset of 2D magnetic reconnection in the solar photosphere, chromosphere and corona. Astronomy & Astrophysics, 609. A100. ISSN 0004-6361

Snow, Ben, Botha, Gert, Regnier, Stephane, Morton, Richard, Verwichte, Erwin and Young, Peter (2017) Observational signatures of a kink-unstable coronal flux rope using Hinode/EIS. The Astrophysical Journal, 842 (1). p. 16. ISSN 0004-637X

McLaughlin, James, Botha, Gert, Regnier, Stephane and Spoors, David (2016) 3D WKB solution for fast magnetoacoustic wave behaviour around an X-line. Astronomy & Astrophysics, 591. A103. ISSN 0004-6361

Snow, Ben, Botha, Gert and Regnier, Stephane (2015) Chromospheric seismology above sunspot umbrae. Astronomy & Astrophysics, 580. A107. ISSN 0004-6361

Anderson, Johan and Botha, Gert (2015) Statistical properties of Charney-Hasegawa-Mima zonal flows. Physics of Plasmas, 22 (5). 052305. ISSN 1070-664X

Srivastava, Abhishek, Botha, Gert, Arber, Tony and Kayshap, P. (2013) Simulation of the observed coronal kink instability and its implications for the SDO/AIA. Advances in Space Research, 52 (1). pp. 15-21. ISSN 1879-1948

Botha, Gert, Rucklidge, Alistair and Hurlburt, Neal (2012) Formation of magnetic flux tubes in cylindrical wedge geometry. Geophysical and Astrophysical Fluid Dynamics, 106 (6). pp. 701-709. ISSN 1029-0419

Botha, Gert, Arber, Tony and Srivastava, Abhishek (2012) Observational signatures of the coronal kink instability with thermal conduction. The Astrophysical Journal, 745 (1). p. 53. ISSN 0004-637X

Botha, Gert, Arber, Tony and Hood, Alan William (2011) Thermal conduction effects on the kink instability in coronal loops. Astronomy & Astrophysics, 525 (A96). ISSN 0004-6361

Botha, Gert, Arber, Tony, Nakariakov, Valery and Zhugzhda, Yuzef (2011) Chromospheric resonances above sunspot umbrae. The Astrophysical Journal, 728 (2). p. 84. ISSN 0004-637X

Botha, Gert, Rucklidge, Alistair and Hurlburt, Neal (2011) Nonlinear three-dimensional magnetoconvection around magnetic flux tubes. The Astrophysical Journal, 731 (2). pp. 108-132. ISSN 0004-637X

Arber, Tony, Botha, Gert and Brady, Christopher S. (2009) Effect of solar chromospheric neutrals on equilibrium field structures. The Astrophysical Journal, 705 (2). pp. 1183-1188. ISSN 0004-637X

Botha, Gert, Busse, F. H., Hurlburt, Neal and Rucklidge, Alistair (2008) Numerical simulations of rotating axisymmetric sunspots. Monthly Notices of the Royal Astronomical Society, 387 (4). pp. 1445-1462. ISSN 0035-8711

Botha, Gert, Rucklidge, Alistair and Hurlburt, Neal (2007) Nonaxisymmetric instabilities of convection around magnetic flux tubes. The Astrophysical Journal Letters, 662 (1). L27-L30. ISSN 2041-8205

Botha, Gert and Evangelidis, E. A. (2007) Reply to comment on “Relativistic Landau resonances”. Journal of Geophysical Research, 112 (A5). A05206. ISSN 0148-0227

Botha, Gert, Rucklidge, Alistair and Hurlburt, Neal (2006) Converging and diverging convection around axisymmetric magnetic flux tubes. Monthly Notices of the Royal Astronomical Society, 369 (4). pp. 1611-1624. ISSN 0035-8711

Evangelidis, E. A. and Botha, Gert (2005) Relativistic Landau resonances. Journal of Geophysical Research, 110 (A2). A02216. ISSN 0148-0227

Botha, Gert and Evangelidis, E. A. (2004) Extreme ultraviolet emission lines of Ni xii in laboratory and solar spectra. Monthly Notices of the Royal Astronomical Society, 350 (1). pp. 375-384. ISSN 0035-8711

Evangelidis, E. A. and Botha, Gert (2003) A new family of solutions of the force-free field equation. Solar Physics, 213 (1). pp. 69-86. ISSN 0038-0938

Keenan, Francis, Botha, Gert, Matthews, A., Lawson, K. D., Bell, Kenneth, Ramsbottom, Catherine, Coffey, Ivor and O'Mullane, Martin (2001) A comparison of theoretical line intensity ratios for Ni XII with extreme ultraviolet observations from the JET tokamak. Journal of Physics B: Atomic, Molecular and Optical Physics, 34 (4). pp. 639-645. ISSN 0953-4075

Keenan, Francis, Botha, Gert, Matthews, A., Lawson, K. D. and Coffey, Ivor (2000) Extreme ultraviolet emission lines of Ni XII in laboratory and solar spectra. Monthly Notices of the Royal Astronomical Society, 318 (1). pp. 37-39. ISSN 0035-8711

Botha, Gert, Arber, Tony, Nakariakov, Valery and Keenan, Francis (2000) A developed stage of Alfven wave phase mixing. Astronomy & Astrophysics, 363 (3). pp. 1186-1194. ISSN 0004-6361

Evangelidis, E. A., Vaughan, L. L. and Botha, Gert (2000) The structure of force-free magnetic fields. Solar Physics, 193 (1/2). pp. 17-32. ISSN 0038-0938

Botha, Gert, Haines, Malcolm and Hastie, Jim (1999) The effect of sheared diamagnetic flow on turbulent structures generated by the Charney–Hasegawa–Mima equation. Physics of Plasmas, 6 (10). pp. 3838-3852. ISSN 1070-664X

Book Section

Botha, Gert, Rucklidge, Alistair, Busse, F. H. and Hurlburt, Neal (2006) Numerical simulations of rotating sunspots. In: Proceedings of SOHO-17 ‘10 Years of SOHO and Beyond’. ESA SP, 617 . ESA Publications Division, ESTEC, Noordwijk, The Netherlands. ISBN 978-9290929284

Botha, Gert and Evangelidis, E. A. (2006) Differential rotation and angular momentum. In: Proceedings of the International Astronomical Union. Proceedings of the International Astronomical Union Symposia and Colloquia, 2 (S239). Cambridge University Press, Cambridge, UK, pp. 451-453. ISBN 9780521863490

Botha, Gert, Rucklidge, Alistair and Hurlburt, Neal (2006) Numerical simulations of sunspots. In: Proceedings of the International Astronomical Union. Proceedings of the International Astronomical Union Symposia and Colloquia, 2 (S239). Cambridge University Press, Cambridge, UK, pp. 507-509. ISBN 9780521863490

Phillips, M. E., Keenan, Francis, Rose, Steven, Botha, Gert, Foord, Mark, Heeter, Robert and Ferland, Gary (2001) Photoionized plasma calculations using laboratory and astrophysical models. In: Spectroscopic Challenges of Photoionized Plasmas. ASP Conference Series, 247 (247). Astronomical Society of the Pacific, San Francisco, pp. 123-126. ISBN 978-1-58381-583-0