3 papers
astro-ph.GA2026
Systematic selection of surrogate models for nonequilibrium chemistry
Robin Janssen, Lorenzo Branca, Tobias Buck
Nonequilibrium chemistry is central to many astrophysical environments but remains a major computational bottleneck in simulations because solving the associated stiff ODE systems…
astro-ph.IM2025
Ray-trax: Fast, Time-Dependent, and Differentiable Ray Tracing for On-the-fly Radiative Transfer in Turbulent Astrophysical Flows
Lorenzo Branca, Rune Rost, Tobias Buck
Radiative transfer is a key bottleneck in computational astrophysics: it is nonlocal, stiff, and tightly coupled to hydrodynamics. We introduce Ray-trax, a GPU-oriented, fully diff…
astro-ph.IM2025
Emulating Radiative Transfer in Astrophysical Environments
Rune Rost, Lorenzo Branca, Tobias Buck
Radiative transfer is a fundamental process in astrophysics, essential for both interpreting observations and modeling thermal and dynamical feedback in simulations via ionizing ra…