# A Python Calculator for Supernova Remnant Evolution

## TL;DR

This paper introduces a Python software tool that models supernova remnant evolution across various environments, aiding both understanding and observational data analysis.

## Contribution

It provides a comprehensive, user-friendly Python code that simulates multiple SNR evolutionary models, including standard and alternative scenarios, with graphical outputs.

## Key findings

- Demonstrates properties of SNR evolution using the software.
- Provides a versatile tool for modeling SNRs in different ISM conditions.
- Enables estimation of SNR parameters from observational data.

## Abstract

A freely available Python code for modelling SNR evolution has been created. This software is intended for two purposes: to understand SNR evolution; and to use in modelling observations of SNR for obtaining good estimates of SNR properties. It includes all phases for the standard path of evolution for spherically symmetric SNRs. In addition, alternate evolutionary models are available, including evolution in a cloudy ISM, the fractional energy loss model, and evolution in a hot low-density ISM. The graphical interface takes in various parameters and produces outputs such as shock radius and velocity vs. time, SNR surface brightness profile and spectrum. Some interesting properties of SNR evolution are demonstrated using the program.