# Kinetics and clustering of dust particles in supersonic turbulence with self-gravity

## TL;DR

This study simulates supersonic turbulent gas with dust particles and self-gravity, finding that gravity does not significantly increase dust clustering but raises particle velocities.

## Contribution

It provides the first detailed comparison of dust clustering and velocities in turbulent gas with and without self-gravity in a steady state.

## Key findings

- Self-gravity does not significantly enhance dust clustering.
- Heavy particles exhibit higher mean velocities with self-gravity.
- Velocity distributions shift to higher speeds when gravity is included.

## Abstract

We present a simulation of isothermal supersonic (rms Mach number $\mathcal{M}_{\rm rms} \sim 3$) turbulent gas with inertial particles (dust) and self-gravity in statistical steady-state, which we compare with a corresponding simulation without self-gravity. The former is in steady state, but close to gravitationally unstable, since we match the scale of the simulation box with Jeans wavelength, which provides the strongest influence of gravity on the dynamics of gas and dust without causing irreversible gravitational collapses. We find that self-gravity does not cause any significant increase in clustering of particles, regardless of particle size, but heavy particles show elevated mean velocities in the presence of self-gravity. The speed distributions are significantly shifted to higher values compared to simulations without self-gravity, but maintains the same shape.