ELFT HÍRADÓ

[mcsete AT physx.u-szeged.hu]

Seminar

Speaker: Vyacheslav (Slava) Lukin
Program Director, Plasma Physics,
Division of Physics, National Science Foundation

Title: The magnetism of the solar surface

Date: 03. (Wednesday) May, 2023, 3 pm
Location / platform:
SZTE TTIK FI Budó Ágoston auditorium & online
https://join.skype.com/MecRIjYZBkkr

Abstract:
The highly dynamic and constantly evolving surface of our nearest  
star, the Sun, is threaded by magnetic fields that emerge,  
self-organize into large-scale structures, and occasionally erupt  
producing solar flares and coronal mass ejections.  These magnetic  
fields permeate the plasma of the solar atmosphere that varies from  
cold, dense, weakly ionized plasma of the chromosphere just above the  
solar surface to the hot and tenuous plasma of the solar corona.   
Throughout, magnetic field structures embedded in the plasma undergo  
cycles of energy accumulation driven by convective motions below,  
inevitably followed by magnetic energy release into plasma flows,  
heating, radiation, and high energy particle acceleration.  A process  
that often underlies both the large-scale magnetic structure formation  
and the magnetic energy release is magnetic reconnection, the process  
associated with changes in magnetic topology within the electrically  
conducting plasma medium.  We discuss the known and the unknown in  
magnetic reconnection research in the solar atmosphere and other  
contexts, and zoom into properties of magnetic substructures  
undergoing magnetic reconnection in partially ionized plasmas of the  
lower solar atmosphere.

Everyone is welcome to attend.

Dr. Csete Mária

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