Optical Observations of M81 Galaxy Group in Narrow Band [SII] and H_alpha Filters: Holmberg IX

• Main Authors: Arbutina, B., Ilić, D., Stavrev, K., Urošević, D., Vukotić, B., Onić, D.
• Format: Article
• Language: English
• Published: Astronomical Observatory, Department of Astronomy, Belgrade 2009-12-01
• Series: Serbian Astronomical Journal
• Subjects: ISM: supernova remnants; HII regions; Methods: observational; Techniques: photometric; Galaxies: ISM; Galaxies: individual: Holmberg IX
• Online Access: http://saj.matf.bg.ac.rs/179/pdf/087-094.pdf

We present observations of the nearby tidal dwarf galaxy Holmberg IX in M81 galaxy group in narrow band [SII] and H$alpha$ filters, carried out in March and November 2008 with the 2m RCC telescope at NAO Rozhen, Bulgaria. Our search for resident supernova remnants (identified as sources with enhanced [SII] emission relative to their H$alpha$ emission) in this galaxy yielded no sources of this kind, besides M&H 10-11 or HoIX X-1. Nevertheless, we found a number of objects with significant H$alpha$ emission that probably represent uncatalogued HII regions.