# A search for extragalactic pulsars in the Local Group galaxies IC 10 and Barnard's Galaxy

## TL;DR

This study conducted deep radio observations of the Local Group galaxies IC 10 and Barnard's Galaxy to search for extragalactic pulsars, setting upper limits on their presence and performing single pulse searches without detections.

## Contribution

First systematic search for pulsars in IC 10 and Barnard's Galaxy using the Green Bank Telescope, establishing upper limits and exploring their neutron star populations.

## Key findings

- No pulsars detected in either galaxy.
- Set an upper flux limit of 0.1 mJy for pulsars.
- Performed single pulse searches with no firm detections.

## Abstract

As of today, more than 2500 pulsars have been found, nearly all in the Milky Way, with the exception of ~28 pulsars in the Small and Large Magellanic Clouds. However, there have been few published attempts to search for pulsars deeper in our Galactic neighborhood. Two of the more promising Local Group galaxies are IC 10 and NGC 6822 (also known as Barnard's Galaxy) due to their relatively high star formation rate and their proximity to our galaxy. IC 10 in particular, holds promise as it is the closest starburst galaxy to us and harbors an unusually high number of Wolf-Rayet stars, implying the presence of many neutron stars. We observed IC 10 and NGC 6822 at 820 MHz with the Green Bank Telescope for ~15 and 5 hours respectively, and put a strong upper limit of 0.1 mJy on pulsars in either of the two galaxies. We also performed single pulse searches of both galaxies with no firm detections.