108 citations · 431 across the 13 of their papers we have counts for
14 papers
Periodic patterns in simple biological differential delay models
A. Ivanov, S. Shelyag
Periodic patterns in dynamical behaviours of biological models described by simple form differential delay equations are studied. Mathematical models are given by a class of scalar…
Modeling the effects of a lightbridge on oscillations in a solar pore
Luiz A. C. A. Schiavo, Mykola Gordovskyy, Philippa K. Browning +7
Solar pores are ideal magnetic structures for wave propagation and transport of energy radially-outwards across the upper layers of the solar atmosphere. We aim to model the excita…
Periodic Solutions in a Simple Delay Differential Equation
Anatoli Ivanov, Sergiy Shelyag
Simple form scalar differential equation with delay and nonlinear negative periodic feedback is considered. The existence of several types of slowly oscillating periodic solutions…
Small-scale solar jet formation and their associated waves and instabilities
Samuel Skirvin, Gary Verth, José Juan González-Avilés +7
Studies on small-scale jets' formation, propagation, evolution, and role, such as type I and II spicules, mottles, and fibrils in the lower solar atmosphere's energetic balance, ha…
New approach for analysing dynamical processes on the surface of photospheric vortex tubes
Yasir Aljohani, Viktor Fedun, Istvan Ballai +3
The majority of studies on multi-scale vortex motions employ a two-dimensional geometry by using a variety of observational and numerical data. This approach limits the understandi…
Solar Vortex Tubes: Vortex Dynamics in the Solar Atmosphere
Suzana S. A. Silva, Viktor Fedun, Gary Verth +2
In this work, a state-of-the-art vortex detection method, Instantaneous Vorticity Deviation, is applied to locate three-dimensional vortex tube boundaries in numerical simulations…
Stellar Surface Magneto-Convection as a Source of Astrophysical Noise III. Sun-as-a-star Simulations and Optimal Noise Diagnostics
H. M. Cegla, C. A. Watson, S. Shelyag +2
Stellar surface magnetoconvection (granulation) creates asymmetries in the observed stellar absorption lines that can subsequently manifest themselves as spurious radial velocities…
Stellar Surface Magneto-Convection as a Source of Astrophysical Noise II. Center-to-Limb Parameterisation of Absorption Line Profiles and Comparison to Observations
H. M. Cegla, C. A. Watson, S. Shelyag +6
Manifestations of stellar activity (such as star-spots, plage/faculae, and convective flows) are well known to induce spectroscopic signals often referred to as astrophysical noise…
Analysis of 3D plasma motions in a chromospheric jet formed due to magnetic reconnection
J. J. González-Avilés, F. S. Guzmán, V. Fedun +4
Within the framework of resistive MHD, implementing the C7 equilibrium atmosphere model and a 3D potential magnetic field realistic configuration, we simulate the formation of a pl…
I. Jet Formation and Evolution due to 3D Magnetic Reconnection
J. J. González-Avilés, F. S. Guzmán, V. Fedun +3
Using simulated data-driven three-dimensional resistive MHD simulations of the solar atmosphere, we show that magnetic reconnection can be responsible of the formation of jets with…
3D simulations of realistic power halos in magneto-hydrostatic sunspot atmospheres: linking theory and observation
Carlos Rijs, S. P. Rajaguru, Damien Przybylski +3
The well-observed acoustic halo is an enhancement in time-averaged Doppler velocity and intensity power with respect to quiet-sun values which is prominent for weak and highly incl…
Ellerman Bombs with Jets: Cause and Effect
A. Reid, M. Mathioudakis, E. Scullion +3
Ellerman Bombs (EBs) are thought to arise as a result of photospheric magnetic reconnection. We use data from the Swedish 1-m Solar Telescope (SST), to study EB events on the solar…
The Dynamics of Rapid Redshifted and Blueshifted Excursions in the Solar Halpha line
D. Kuridze, V. Henriques, M. Mathioudakis +5
We analyse high temporal and spatial resolution time-series of spectral scans of the Halpha line obtained with the CRisp Imaging SpectroPolarimeter (CRISP) instrument mounted on th…
Evidence for the photospheric excitation of incompressible chromospheric waves
R. J. Morton, G. Verth, V. Fedun +2
Observing the excitation mechanisms of incompressible transverse waves is vital for determining how energy propagates through the lower solar atmosphere. We aim to show the connect…