# Thermonuclear (Type Ia) Supernovae and Progenitor Evolution

## TL;DR

This paper reviews current understanding of Type Ia supernovae, focusing on simulations of white dwarf progenitors in the single-degenerate model, highlighting recent 3D convection and nuclear process results.

## Contribution

It provides new 3D simulation results of convection and nuclear reactions in white dwarf progenitors, advancing the modeling of Type Ia supernovae.

## Key findings

- 3D convection simulations of white dwarf progenitors.
- Inclusion of A=23 Urca process in models.
- Insights into progenitor evolution and explosion mechanisms.

## Abstract

Thermonuclear (type Ia) supernovae are bright stellar explosions with the unique property that the light curves can be standardized, allowing them to be used as distance indicators for cosmological studies. Many fundamental questions bout these events remain, however. We provide a critique of our present understanding of these and present results of simulations assuming the single-degenerate progenitor model consisting of a white dwarf that has gained mass from a stellar companion. We present results from full three-dimensional simulations of convection with weak reactions comprising the A=23 Urca process in the progenitor white dwarf.