Standard 1D solar atmosphere as initial condition for MHD simulations and switch-on effects

TL;DR

This paper introduces a comprehensive 1D solar atmosphere model extending from the interior to the corona, addressing common issues in simulation initialization and providing a reliable reference for solar physics studies.

Contribution

A new layered 1D solar atmosphere model covering from the interior to the corona, with guidelines for smooth simulation startup and equilibration.

Findings

Model effectively used as initial condition for HD and MHD simulations.

Highlights common mistakes in switching on simulations and how to avoid them.

Serves as a reference for inverse problem solving in solar physics.

Abstract

Many applications in Solar physics need a 1D atmospheric model as initial condition or as reference for inversions of observational data. The VAL atmospheric models are based on observations and are widely used since decades. Complementary to that, the FAL models implement radiative hydrodynamics and showed the shortcomings of the VAL models since almost equally long time. In this work, we present a new 1D layered atmosphere that spans not only from the photosphere to the transition region, but from the solar interior up to far in the corona. We also discuss typical mistakes that are done when switching on simulations based on such an initial condition and show how the initial condition can be equilibrated so that a simulation can start smoothly. The 1D atmosphere we present here served well as initial condition for HD and MHD simulations and should also be considered as reference data for solving inverse problems.