Colloquium on Aug. 22, 2023

Multiphase dynamics in the solar corona: rain and prominences

Speaker: Rony Keppens (KU Leuven Belgium)

Venue: SWIFAR Building 2111

Time: 15:00 PM, Tuesday, Aug. 22, 2023

Abstract:

The thermal structuring of the (magnetized) solar atmosphere, where a million-degree hot solar corona sits on top of a cooler and denser chromosphere, is mysterious in its own right, and drives modern research in solar coronal heating. Equally intriguing, and much less researched to date, is the omnipresent cooler (order 10000 K) material in the corona, in the form of coronal rain and solar prominences/filaments. In the context of an ongoing ERC project PROMINENT (https://erc-prominent.github.io), we made significant steps forward to unravel the physics behind these (radiatively driven) condensations. I will discuss the challenges associated with multi-dimensional, magnetohydrodynamic models of the solar corona, and show simulations that resolve the spontaneous formation and dynamics of these multiphase ingredients in full detail. They all exploit our open-source MPI-AMRVAC (http://amrvac.org) framework, and I emphasize the many advantages of using a dimension-independent, fully automated block-grid adaptive simulation tool.

Report PPT:  SWIFAR_Rony Keppens.pdf