SEDONA-GesaRaT: an AI-Accelerated Radiative Transfer Program for 3-D Supernova Simulations

TL;DR

SEDONA-GesaRaT is an AI-accelerated radiative transfer code enabling fast, accurate 3-D supernova simulations, including polarization, with significantly reduced computational costs compared to previous methods.

Contribution

The paper introduces SEDONA-GesaRaT, a novel AI-accelerated radiative transfer code for 3-D supernova simulations, combining neural networks with Monte Carlo methods for enhanced speed and accuracy.

Findings

Achieved high-accuracy 3-D NLTE radiative transfer results for SN Ia models.

Reduced computational cost to approximately 3000 core-hours for 3-D NLTE spectropolarimetry.

Successfully retrieved spatially resolved polarization data from the N100 supernova model.

Abstract

We present SEDONA-GesaRaT, a rapid code for supernova radiative transfer simulation developed based on the Monte-Carlo radiative transfer code SEDONA. We use a set of atomic physics neural networks (APNN), an artificial intelligence (AI) solver for the non-local thermodynamic equilibrium (NLTE) atomic physics level population calculation, which is trained and validated on 119 1-D type Ia supernova (SN Ia) radiative transfer simulation results showing great computation speed and accuracy. SEDONA-GesaRaT has been applied to the 3-D SN Ia explosion model N100 to perform a 3-D NLTE radiative transfer calculation. The spatially resolved linear polarization data cubes of the N100 model are successfully retrieved with a high signal-to-noise ratio using the integral-based technique (IBT). The overall computation cost of a 3-D NLTE spectropolarimetry simulation using SEDONA-GesaRaT is only $\sim$3000 core-hours, while the previous codes could only finish 1-D NLTE simulation, or 3-D local thermodynamic equilibrium (LTE) simulation, with similar computation resources. The excellent computing efficiency allows SEDONA-GesaRaT for future large-scale simulations that systematically study the internal structures of supernovae.