Decaying Turbulence in Molecular Clouds

Introduction

This data release contains a suite of 15 AREPO simulations of a spherical molecular clouds of mass \(M=10^4\text{M}_\odot\) and radius \(R \approx 9\text{pc}\) seeded with different types of decaying turbulence. The initial conditions for each simulation are different, with different turbulent modes: mixed turbulence, purely compressive, and purely solenoidal; and different Virial ratios: gravitationally underbound and overbound clouds.

Simulations

Each of the .zip archives contains a simulation. The simulation name is as follows: <Turbulent mode><RNG seed><Virial ratio> where:

• Turbulent mode can be: M = mixed, C = compressive, S = solenoidal.
• RNG seed used to generate the turbulence can be: 26, 57 and 90.
• The Virial ratio can be: none = Virial equilibrium (\(\alpha_\text{vir}=1.0 \)), O = overbound (\(\alpha_\text{vir}=0.6\)), U = underbound (\(\alpha_\text{vir}=2.0\)).

Each simulation consists of:

• Four simulation snapshots, which are AREPO binary files, corresponding to the four epochs of interest: when total mass in sinks/stars is \(250\text{M}_\odot\), \(500\text{M}_\odot\), \(750\text{M}_\odot\), \(1000\text{M}_\odot\).
• Four density grids, corresponding to the four snapshots, which are ray-casted from the AREPO simulations.
• Four filament networks identified in the density grids using the tool DisPerSE.

Reading in the files

The simulations are easily read and analyzed using the code released as part of our study, called \(\texttt{fiesta}\): fiesta-astro.readthedocs.io.

Supplementary content

The data release also contains two animations: 2D_temporal_animation.mp4 and 3D_sinkepoch_animation.mp4, which are useful for visualizing the simulations.