Coronal heating by MHD waves

T Van Doorsselaere, AK Srivastava, P Antolin… - Space Science …, 2020‏ - Springer
The heating of the solar chromosphere and corona to the observed high temperatures, imply
the presence of ongoing heating that balances the strong radiative and thermal conduction …

The first ionization potential effect from the ponderomotive force: on the polarization and coronal origin of Alfvén waves

JM Laming - The Astrophysical Journal, 2017‏ - iopscience.iop.org
We investigate in more detail the origin of chromospheric Alfvén waves that give rise to the
separation of ions and neutrals—the first ionization potential (FIP) effect—through the action …

Torsional Alfvén waves in partially ionized solar plasma: effects of neutral helium and stratification

TV Zaqarashvili, ML Khodachenko, R Soler - Astronomy & Astrophysics, 2013‏ - aanda.org
Context. Ion-neutral collisions may lead to the dam** of Alfvén waves in chromospheric
and prominence plasmas. Neutral helium atoms enhance the dam** in certain …

Nonlinear long-wavelength torsional Alfvén waves

SV Farahani, VM Nakariakov… - Astronomy & …, 2011‏ - aanda.org
Aims. We investigate the nonlinear phenomena accompanying long-wavelength torsional
waves in solar and stellar coronae. Methods. The second order thin flux-tube approximation …

Nonlinear evolution of torsional Alfvén waves

SV Farahani, VM Nakariakov, E Verwichte… - Astronomy & …, 2012‏ - aanda.org
Aims. We study the efficiency of the energy transfer to shorter scales in the field-aligned
direction–the parallel nonlinear cascade–that accompanies the propagation of torsional …

How Alfvén waves induce compressive flows in the neighborhood of a 2.5 D magnetic null-point

S Sabri, SV Farahani, H Ebadi, S Poedts - Scientific Reports, 2020‏ - nature.com
The aim of the present study is to provide insight on the induced compressive perturbations
together with the modifications of the environmental parameters in the course of Alfvén wave …

Transverse kink oscillations in the presence of twist

J Terradas, M Goossens - Astronomy & Astrophysics, 2012‏ - aanda.org
Context. Magnetic twist is thought to play an important role in coronal loops. The effects of
magnetic twist on stable magnetohydrodynamic (MHD) waves is poorly understood because …

Torsional wave propagation in solar tornadoes

SV Farahani, E Ghanbari, G Ghaffari… - Astronomy & …, 2017‏ - aanda.org
Aims. We investigate the propagation of torsional waves in coronal structures together with
their collimation effects in the context of magnetohydrodynamic (MHD) theory. The interplay …

Alfvén wave dynamics at the neighbourhood of a 2.5 D magnetic null-point

S Sabri, S Vasheghani Farahani… - Monthly Notices of …, 2018‏ - academic.oup.com
The aim of the present study is to highlight the energy transfer via the interaction of
magnetohydrodynamic waves with a 2.5 D magnetic null-point in a finite plasma-β regime of …

On collective nature of non-linear torsional Alfvén waves

SA Belov, DS Riashchikov, DY Kolotkov… - Monthly Notices of …, 2023‏ - academic.oup.com
Torsional Alfvén waves in coronal plasma loops are usually considered to be non-collective,
ie consist of cylindrical surfaces evolving independently, which significantly complicates …