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Optical observations of the nearby galaxy NGC 2366 through narrowband Hα and [SII] filters. Supernova remnants status

Vučetić M.M. (Faculty of Mathematics, Department of Astronomy, Belgrade)
Onić D. (Faculty of Mathematics, Department of Astronomy, Belgrade)
Petrov N. (Bulgarian Academy of Sciences, Institute of Astronomy and National Astronomical Observatory, Sofia, Bulgaria)
Ćiprijanović A. (Faculty of Mathematics, Department of Astronomy, Belgrade)
Pavlović M.Z. (Faculty of Mathematics, Department of Astronomy, Belgrade)

We present detection of 64 H II regions, three superbubbles and two optical supernova remnant (SNR) candidates in the nearby irregular galaxy NGC 2366. The SNR candidates were detected by applying [S II]/Hα ratio criterion to observations made with the 2-m RCC telescope at Rozhen National Astronomical Observatory in Bulgaria. In this paper we report coordinates, diameters, Hα and [S II] fluxes for detected objects across the two fields of view in the NGC 2366 galaxy. Using archival XMM-Newton observations we suggest possible X-ray counterparts of two optical SNR candidates. Also, we discard classification of two previous radio SNR candidates in this galaxy since they appear to be background galaxies.

Keywords: ISM: supernova remnants, HII regions, Galaxies: individual: NGC2366

Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. 17600: Emission nebulae: Structure and evolution