Dr. Anaelle Halle

Postdoctoral fellow at Max Planck Institute for Astrophysics

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Welcome to my homepage. I am a postdoctoral fellow at the Max Planck Institute for Astrophysics in Garching, Germany (fellowship starting in October 2016). I work on numerical simulations of galaxies, studying problems such as the radial migration of stars in galactic discs. I have also been working on Vlasov-Poisson solvers since my previous postdoctoral position in the IAP in Paris (2014-2016). I started studying radial migration in discs in the GEPI laboratory of the Observatory of Paris-Meudon during the 2013/2014 academic year. I finished my Ph.D. studies in the LERMA under the supervision of FranÁoise Combes in May 2013. This Ph.D. was about baryonic physics in simulations of spiral galaxies, with a focus on the effects of molecular hydrogen cooling in the outskirts of galactic discs.

I perform or use different numerical simulations . During my Ph.D I performed simulations of the evolution of disc galaxies using the publicly available code Gadget-2 to which I have added some baryonic physics so as to study its influence on galaxy evolution. I used my simulations to study the impact of molecular hydrogen cooling in this paper, and to study radial migration of stars due epicyclic excursions or to resonances (bar and spiral arms) in this other paper. I have now started working on different ways of numerically solving the Vlasov-Poisson equations that describes the evolution of a collisionless self-gravitating fluid. Dark matter or stars in galaxies are modelled as such a fluid satisfying this system of equations, but as the system is difficult to solve numerically, simplifications such as the N-body method are often used. It is interesting to see the advantages or drawbacks of these methods compared with particle-less codes.

Contact

halle at mpa-garching.mpg.de

Max Planck Institute for Astrophysics
Karl-Schwarzschild-Strasse 1
85748 Garching
Deutschland


Phone: +49 89 30000 2247

Website created and designed by AnaŽlle Hallť