Conveners
Poster Session 3.4
- Elena Khomenko (Instituto de Astrofisica de Canarias)
Understanding the energy dissipation in plasmas with low collisionality such as the solar wind is still a matter of ongoing research. While magnetic reconnection and turbulence are processes that can produce the appropriate conditions for heating and energy dissipation at subptroton scales, the energy distribution during 3D reconnection events that occur from a turbulent cascade is not...
Fast-drift solar radio bursts' exciter velocities have been well studied by analysing type III and type J bursts. These bursts are produced by electron beams travel along open and closed coronal flux tubes. It is thought that electron beams travelling along different magnetic field structures have similar acceleration properties although it has not systematically been tested using radio...
We investigate the generation of mass flux due to a torsional Alfvén pulse, as observed in e.g. photospheric magnetic bright points (MBPs). A flux tube model is developed, with the waves introduced at the lower, photospheric boundary of the tube as a magnetic shear perturbation. Due to the nature of MBPs we simplify the model by using the zero-beta approximation for the plasma inside the tube....
The latest expansions to the standard flare model in three dimensions (Aulanier & Dudík, 2019) led to identification of geometries in which field lines reconnect during eruptive flares. One of these geometries is the magnetic ‘ar-rf’ reconnection between the erupting flux rope and surrounding field lines. It occurs at ribbon hooks and leads to drift of flux rope footpoints across the solar...
Observations have revealed the diffusive nature of solar coronal plasma in the form of solar flares, coronal mass ejections, jets--manifestation of magnetic reconnections (MRs). The onset of reconnection in a perfectly conducting plasma like the solar corona requires the generation of small scales in consequence of large scale dynamics, eventually leading to a locally reduced characteristic...
The propagation of magnetoacoustic waves about a 2D magnetic X-point has revealed the existence of oscillatory reconnection, which is a series of horizontal and vertical current sheets with associated changes in magnetic connectivity. Oscillatory reconnection has been proposed as a wave-generation mechanism to explain some of high-speed, quasi-periodic outflows/jets in the solar atmosphere, as...
Magnetic helicity is a physical quantity of great importance in the study of magnetized plasmas as it is conserved in ideal magneto-hydrodynamics and slowly deteriorating in non-ideal conditions such as magnetic reconnection. A meaningful way of defining a density for magnetic helicity is through field line helicity, which, in solar conditions, is expressed by relative field line helicity...
