# Enhanced X-ray emission from candidate Lyman continuum emitting galaxies

## TL;DR

This study investigates the X-ray properties of potential Lyman continuum emitting galaxies, suggesting X-ray binaries could have played a significant role in early Universe reionization by analyzing local galaxy data.

## Contribution

It provides new observational evidence linking X-ray binaries to Lyman continuum escape in local galaxies, supporting their role in cosmic reionization.

## Key findings

- Five galaxies have X-ray sources detected.
- Four galaxies show elevated X-ray luminosity relative to star formation.
- X-ray sources correlate with reduced dust obscuration.

## Abstract

X-ray binaries may have helped reionize the early Universe by enabling Lyman continuum escape. We analyzed a set of 8 local galaxies that are potential Lyman leaking galaxies, identified by a blue color and weak emission lines, using Chandra X-ray observations. Five of the galaxies feature X-ray sources, while three galaxies are not significantly detected in X-rays. X-ray luminosities were found for the galaxies and X-ray sources. Four of the galaxies have elevated X-ray luminosity versus what would be expected based on star formation rate and metallicity. The presence of detected X-ray sources within the galaxies is found to correlate with the ratio of the star formation rate estimated from the near-ultraviolet flux to that estimated from the infrared. This implies reduced obscuration due to dust in the galaxies with X-ray sources. These results support the idea that X-ray binaries may be an important part of the process of reionziation.