Tutorial: Asteroseismic Stellar Modelling with AIMS

Lund, Mikkel N., Reese, Daniel R.

Tutorial: Asteroseismic Stellar Modelling with AIMS,

Asteroseismology and Exoplanets: Listening to the Stars and Searching for New Worlds, Astrophysics and Space Science Proceedings, Volume 49. ISBN 978-3-319-59314-2. Springer International Publishing AG


The goal of aims (Asteroseismic Inference on a Massive Scale) is to estimate stellar parameters and credible intervals/error bars in a Bayesian manner from a set of asteroseismic frequency data and so-called classical constraints. To achieve reliable parameter estimates and computational efficiency, it searches through a grid of pre-computed models using an MCMC algorithm—interpolation within the grid of models is performed by first tessellating the grid using a Delaunay triangulation and then doing a linear barycentric interpolation on matching simplexes. Inputs for the modelling consist of individual frequencies from peak-bagging, which can be complemented with classical spectroscopic constraints. aims is mostly written in Python with a modular structure to facilitate contributions from the community. Only a few computationally intensive parts have been rewritten in Fortran in order to speed up calculations.

Keywords: physics

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