# The X-ray-Resolved Supernova Remnant S8 in the Dwarf Irregular Galaxy IC 1613

## TL;DR

This study uses Chandra X-ray observations to resolve the supernova remnant S8 in galaxy IC 1613, providing detailed morphology, luminosity limits, and age estimates, and suggesting it is a young composite SNR.

## Contribution

First high-resolution X-ray imaging of S8 in IC 1613, revealing its morphology, luminosity constraints, and age, and classifying it as a young composite supernova remnant.

## Key findings

- Resolved S8 with Chandra X-ray imaging.
- Estimated S8's age to be approximately 3400-5600 years.
- Set upper limit on central compact object luminosity.

## Abstract

We conducted an observation of the nearby irregular galaxy IC 1613 with the Chandra X-ray Observatory using the S3 chip of the ACIS with an effective exposure time of 49.9 ksec. The observation primarily targeted the extensive bubble and star formation region in the northeast quadrant of the galaxy. The only known supernova remnant (SNR) in IC 1613, S8, is also the galaxy's most luminous X-ray source (L_X (0.3-8 keV) ~5-6x10^{36} erg/s). We resolve the SNR with Chandra and compare its nearly circular X-ray morphology with Halpha and radio images. We assign an upper limit on the luminosity of any possible associated compact central object of ~4x10^{35}$ erg/s (0.3-8 keV band) and conclude that we would detect a Crab-like pulsar but not a Cas A-like object. We infer an age for S8 of ~3400-5600 years and compare it to other SNRs in the Local Group. We suggest that S8 is a young composite SNR.