Catholic University of Leuven, Belgium | 2020 Jun 18
Plasma astrophysicists at KU Leuven have created the first self-consistent simulation of the physical processes that occur during a solar flare. The researchers used Flemish supercomputers and a new combination of physical models.
Solar flares are explosions on the surface of the Sun that release an enormous amount of energy, equivalent to a trillion 'Little Boy' atomic bombs exploding at the same time. In extreme cases, solar flares can disable radio connections and power stations on Earth, but they are also at the basis of stunning space weather phenomena. The Northern Lights, for instance, are linked to a solar flare that disturbs the magnetic field of the Sun to such an extent that a bubble of solar plasma can escape from the atmosphere of the Sun.Solar flares are explosions on the surface of the Sun that
release an enormous amount of energy. © Peter Jurik
Thanks to satellites and solar telescopes, we already understand quite a lot about the physical processes that take place during a solar flare. For one thing, we know that solar flares convert energy from magnetic fields into heat, light and motion energy very efficiently.
In science textbooks, these processes are commonly visualised as the standard 2-D solar flare model. The details of this illustration, however, have never been confirmed. This is because creating a fully consistent simulation is a huge challenge, given that both macroscopic effects (we're talking several tens of thousands of kilometres here: larger than Earth) and microscopic particle physics have to be taken into account.
Researchers at KU Leuven have now been able to create such a simulation. ... The researchers used the computational power of Flemish supercomputers as well as a new combination of physical models in which the microscopic effects of accelerated charged particles were taken into account in a macroscopic model. ...
A Fully Self-Consistent Model for Solar Flares ~ Wenzhi Ruan, Chun Xia, Rony Keppens
- Astrophysical Journal 896(2):97 (2020 Jun 20) DOI: 10.3847/1538-4357/ab93db
- arXiv.org > astro-ph > arXiv:2005.08578 > 18 May 2020