StaNdaRT: A repository of standardized test models and outputs for supernova radiative transfer

TL;DR

This paper introduces StaNdaRT, a public repository of standardized supernova radiative transfer models and outputs, enabling code comparison and validation across different RT codes for Type Ia supernovae.

Contribution

It provides a comprehensive set of benchmark models, results, and tools for comparing supernova radiative transfer codes, fostering standardization and reproducibility in the field.

Findings

Consistent light curves and spectra across different RT codes.

Identification of discrepancies in physical property evolution.

Public availability of models and analysis scripts.

Abstract

We present the first results of a comprehensive supernova (SN) radiative-transfer (RT) code-comparison initiative (StaNdaRT), where the emission from the same set of standardized test models is simulated by currently-used RT codes. A total of ten codes have been run on a set of four benchmark ejecta models of Type Ia supernovae. We consider two sub-Chandrasekhar-mass ($M_\mathrm{tot} = 1.0$ M$_\odot$) toy models with analytic density and composition profiles and two Chandrasekhar-mass delayed-detonation models that are outcomes of hydrodynamical simulations. We adopt spherical symmetry for all four models. The results of the different codes, including the light curves, spectra, and the evolution of several physical properties as a function of radius and time, are provided in electronic form in a standard format via a public repository. We also include the detailed test model profiles and several python scripts for accessing and presenting the input and output files. We also provide the code used to generate the toy models studied here. In this paper, we describe in detail the test models, radiative-transfer codes and output formats and provide access to the repository. We present example results of several key diagnostic features.