3 papers
astro-ph.SR2020
Fast and accurate approximation of the angle-averaged redistribution function for polarized radiation
A. Paganini, B. Hashemi, E. Alsina Ballester +1
Modeling spectral line profiles taking frequency redistribution effects into account is a notoriously challenging problem from the computational point of view, especially when pola…
math.OC2020
Fireshape: a shape optimization toolbox for Firedrake
Alberto Paganini, Florian Wechsung
We introduce Fireshape, an open-source and automated shape optimization toolbox for the finite element software Firedrake. Fireshape is based on the moving mesh method and allows u…
astro-ph.SR2018
Formal solutions for polarized radiative transfer. III. Stiffness and instability
Gioele Janett, Alberto Paganini
Efficient numerical approximation of the polarized radiative transfer equation is challenging because this system of ordinary differential equations exhibits stiff behavior, which…