Detectability of Local Group Dwarf Galaxy Analogues at High Redshifts

TL;DR

This paper assesses the potential for detecting Local Group dwarf galaxy analogues at high redshifts, comparing their properties with observed high-z galaxies and evaluating future JWST capabilities.

Contribution

It provides a comparative analysis of dwarf galaxy properties and high-redshift observations, highlighting the prospects for JWST to detect these analogues.

Findings

Dwarf galaxies share properties with high-redshift galaxies.

Current observations limit detection of progenitors.

JWST will improve detection prospects.

Abstract

The dwarf galaxies of the Local Group are believed to be similar to the most abundant galaxies during the epoch of reionization (z>6). As a result of their proximity, there is a wealth of information that can be obtained about these galaxies; however, due to their low surface brightnesses, detecting their progenitors at high redshifts is challenging. We compare the physical properties of these dwarf galaxies to those of galaxies detected at high redshifts using Hubble Space Telescope and Spitzer observations and consider the promise of the upcoming James Webb Space Telescope on the prospects for detecting high redshift analogues of these galaxies.