Joonas Nättilä received his MSc. in astrophysics from University of Oulu, Finland, and is finishing his Ph.D. from Tuorla Observatory, University of Turku, in 2017. He has also been teaching high-performance computing in the Finnish IT Center for Science, CSC, since 2015.
His field of research is in the contact point of relativistic astrophysics and computational physics. In his Ph.D. thesis, he studied thermonuclear explosions on top of neutron stars, and how they can be used as a gauge for the ultra-dense matter inside the star. Most importantly, this work demonstrated how astrophysical measurements can be used to constrain the unknown nuclear physics of neutron star interiors. Recently, he has also been working on fully kinetic 6D plasma simulations coupled to radiative processes. Connecting the non-linear plasma dynamics with radiative processes offers us a new tool to understand many still unknown fundamental astrophysical processes. Research on this new emerging field has only recently been made possibly by increased computational resources and novel usage of modern supercomputing platforms.
In his free time, Joonas has studied everything from econophysical models to weather prediction, and emergent animal behaviour in ant colonies. Most of his work and numerical codes are freely available as open source projects.