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SUMMARY:Modeling ion-neutral interaction in the solar chromosphere - Elena
  Khomenko (IAC Tenerife)
DTSTART:20250609T130000Z
DTEND:20250609T140000Z
UID:TALK231970@talks.cam.ac.uk
CONTACT:Roger Dufresne
DESCRIPTION:In this talk I will describe the results of the PI2FA project 
 focused on creating and applying tools for multi-dimensional modeling of p
 artially ionized chromospheric plasma based on the single-fluid and two-fl
 uid multi-species formalism. Scientific questions include clarifying chrom
 ospheric heating mechanisms\, creating multi-dimensional realistic models 
 of the solar chromosphere incorporating ion-neutral effects\, and understa
 nding neutrals' role in prominence dynamics. The research focused on funda
 mental mechanisms of energy propagation and exchange in complex plasmas\, 
 such as waves\, instabilities\, and plasma-radiation interactions\, seekin
 g the transition from one-dimensional idealized models to multi-dimensiona
 l simulations\, and observational support. Among the main conclusions\, ou
 r research unveiled that multi-fluid effects become pronounced for waves w
 ith frequencies lower than typical inter-particle collisional frequencies\
 , unlike suggested by theory of waves in homogeneous plasmas\; we showed t
 hat ambipolar heating is most significant in the quietest regions\, charac
 terized by small-scale dynamo fields\; we found that multi-fluid effects h
 old great importance within transition layers between cool and hot materia
 ls\, such as the solar transition region and prominence-corona interface. 
 Multi-fluid effects operate at scales beyond the resolution capabilities o
 f even our most advanced instrumentation\, necessitating specialized obser
 vational initiatives. Our initial steps in this direction allowed the dete
 ction of subtle differences in velocities between ions and neutrals\, in l
 ine with theoretical predictions.
LOCATION:MR14 DAMTP and online
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