A High-Resolution Radio Continuum Study Of The Dwarf Irregular Galaxy IC 10

TL;DR

This study uses high-resolution radio maps to analyze the compact sources and overall radio emission of the dwarf galaxy IC10, updating flux measurements and classifying sources with implications for understanding its star-forming regions.

Contribution

The paper provides high-resolution radio continuum maps of IC10 at 1.5 and 5 GHz, classifies detected sources, and refines the galaxy's integrated flux densities accounting for background contamination.

Findings

Detected 11 compact sources at 1.5 GHz, 5 at 5 GHz.

Classified sources as HII regions, background galaxies, or unclassified.

Updated flux densities of IC10 at 1.5 GHz and 4.85 GHz, confirming minimal background contamination.

Abstract

We present high-resolution e-MERLIN radio continuum maps of the Dwarf Irregular galaxy IC10 at 1.5GHz and 5GHz. We detect 11 compact sources at 1.5GHz, 5 of which have complementary detections at 5GHz. We classify 3 extended sources as compact H{\sc ii} regions within IC10, 5 sources as contaminating background galaxies and identify 3 sources which require additional observations to classify. We do not expect that any of these 3 sources are Supernova Remnants as they will likely be resolved out at the assumed distance of IC10 (0.7Mpc). We correct integrated flux densities of IC10 from the literature for contamination by unrelated background sources and obtain updated flux density measurements of $354\pm11$\,mJy at 1.5GHz and $199\pm9$\,mJy at 4.85GHz. The background contamination does not contribute significantly to the overall radio emission from IC10, so previous analysis concerning its integrated radio properties remain valid.

Full text

See pages 1-last of IC10_2016_v6_clean.pdf