Optical observations of the nearby galaxy IC342 with narrow band [SII] and H$\alpha$ filters. II - Detection of 16 Optically-Identified Supernova Remnant Candidates

TL;DR

This study identifies 16 optical supernova remnant candidates in galaxy IC342 using narrow-band imaging, providing their properties and estimating their contribution to the galaxy's Hα flux, which impacts star formation rate calculations.

Contribution

First detection of 16 optical SNR candidates in IC342 using [SII]/Hα ratio with detailed flux and positional data, enhancing understanding of SNRs in nearby galaxies.

Findings

16 SNR candidates detected in IC342.

Estimated SNR contribution to Hα flux is 1.4%.

Provides coordinates, diameters, and fluxes for each SNR.

Abstract

We present the detection of 16 optical supernova remnant (SNR) candidates in the nearby spiral galaxy IC342. The candidates were detected by applying [SII]/H$\alpha$ ratio criterion on observations made with the 2 m RCC telescope at Rozhen National Astronomical Observatory in Bulgaria. In this paper, we report the coordinates, diameters, H$\alpha$ and [SII] fluxes for 16 SNRs detected in two fields of view in the IC342 galaxy. Also, we estimate that the contamination of total H$\alpha$ flux from SNRs in the observed portion of IC342 is 1.4%. This would represent the fractional error when the star formation rate (SFR) for this galaxy is derived from the total galaxy's H$\alpha$ emission.