Optical supernova remnants in nearby galaxies and their influence on star formation rates derived from H$\alpha$ emission

Abstract

In this paper we present the most up-to-date list of nearby galaxies with optically detected supernova remnants (SNRs). We discuss the contribution of the Hα flux from the SNRs to the total Hα flux and its influence on derived star formation rate (SFR) for 18 galaxies in our sample. We found that the contribution of SNRs' flux to the total Hα flux is 5 $\pm$ 5 per cent. Due to the observational selection effects, the SNRs contamination of SFRs derived herein represents only a lower limit.

18 pages, 4 figures, 3 tables + appendix; accepted by MNRAS

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• The radial distribution of supernovae compared to star formation tracers
• The Supernova Remnant Populations of the galaxies NGC 45, NGC 55, NGC 1313, NGC 7793: Luminosity and Excitation Functions
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