# Astro2020: How does dust escape from galaxies?

## TL;DR

This paper discusses the importance of cosmic dust in galaxy outflows, emphasizing the need to measure dust properties around galaxies to understand its escape mechanisms and history.

## Contribution

It highlights the potential for future measurements of circumgalactic dust to elucidate how and when dust escapes from galaxies.

## Key findings

- Dust traces galaxy outflows and stripping processes.
- Measuring circumgalactic dust can reveal escape mechanisms.
- Future observations will improve understanding of dust escape.

## Abstract

Whenever gas is blown out of a galaxy, chances are that it contains some cosmic dust. This dust is an important part of the metals budget for the circumgalactic and intergalactic media, and traces the outflow and stripping history of the galaxy. The dust is also interesting in its own right, as dust plays an essential role in many astrophysical processes. We have only begun to learn about circumgalactic dust, and in particular we do not know how (and when) it escapes its host galaxy. Here we describe the prospects for measuring the dust mass and properties around many individual galaxies, which will form the basis for understanding how the dust got there.