The peculiar composition of the solar atmosphere in heavy ions still remains as one of the major standing problem in solar physics. Through this contribution, I will review why its origin and underlying physical mechanisms are still highly debated. Several promising candidates have already been examined in past studies, but separately with systematic disagreements with observations.
To tackle this problem, I will review the physics needed to build up a self-consistent and comprehensive model of multi-specie plasmas. Stratification, particle-particle diffusion and wave-particle effects will be discussed. And such in varying plasma regimes encountered in the solar atmosphere: cool/hot temperatures, strongly/weakly collisional, optically thick/thin, partially/fully ionized, magnetically/plasma dominated.
That complexity leads up to computational and interpretation challenges even for “simple” 1-D simulations for which I will present some preliminary results. Finally, I will present some ideas for future developments.
This Friday colloquium will be hybrid. Attendees can therefore participate either in-person or via Zoom. Please join via Zoom at
https://uio.zoom.us/j/69001043754?pwd=cEJpbVE5ci9PdWNtRld2TDNNcGtKdz09
Meeting ID:690 0104 3754
Passcode: PeiseStua3
Attendees will be muted during the colloquium, but will have the opportunity to ask questions at the end by clicking on the "raise hand” button (or send a request via chat).