Presented By: Climate and Space Sciences and Engineering
CLASP Seminar Series: Prof. Rony Keppens, of Katholieke Universiteit, Leuven
Prof. Rony Keppens, of Katholieke Universiteit, Leuven will give a virtual lecture as part of the CLASP Seminar Series. Please join us!
[lecture zoom details coming soon!]
Title: PROMINENT: unraveling the secrets of solar prominences and coronal rain showers
Abstract:
In the ERC-funded project PROMINENT, we set forth to study the `coolest' part
of the million-degree solar atmosphere: the condensations formed by thermal
instabilities. These come in all shapes and sizes, with the largest condensations
forming prominences - clouds suspended magnetically against gravity, one
hundredfold cooler and denser than the atmosphere itself. Their formation,
internal dynamics, and ultimate ejection into violent coronal mass ejections are
routinely witnessed with modern solar observatories, but they pose severe
challenges to modelling efforts. I will present state-of-the-art magnetohydrodynamic simulations, where the process of runaway condensations due to radiative losses is studied in unprecedented detail. The simulations cover prominence scenarios as well as coronal rain showers, where small-scale condensations repeatedly form and rain down in thermodynamically structured magnetic arcades. This solar analog of our own weather turns out to be ubiquitous throughout the solar atmosphere. Our simulations all use the open-source MPI-AMRVAC simulation toolkit [1,2], where the grid-adaptivity is essential to zoom in on details that will be resolved by future observing facilities.
[lecture zoom details coming soon!]
Title: PROMINENT: unraveling the secrets of solar prominences and coronal rain showers
Abstract:
In the ERC-funded project PROMINENT, we set forth to study the `coolest' part
of the million-degree solar atmosphere: the condensations formed by thermal
instabilities. These come in all shapes and sizes, with the largest condensations
forming prominences - clouds suspended magnetically against gravity, one
hundredfold cooler and denser than the atmosphere itself. Their formation,
internal dynamics, and ultimate ejection into violent coronal mass ejections are
routinely witnessed with modern solar observatories, but they pose severe
challenges to modelling efforts. I will present state-of-the-art magnetohydrodynamic simulations, where the process of runaway condensations due to radiative losses is studied in unprecedented detail. The simulations cover prominence scenarios as well as coronal rain showers, where small-scale condensations repeatedly form and rain down in thermodynamically structured magnetic arcades. This solar analog of our own weather turns out to be ubiquitous throughout the solar atmosphere. Our simulations all use the open-source MPI-AMRVAC simulation toolkit [1,2], where the grid-adaptivity is essential to zoom in on details that will be resolved by future observing facilities.
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