Interstellar gas motions around massive star formation regions in the nearby dwarf galaxy DDO43

Abstract

Areas of massive star formation are strongly influenced by stellar winds and supernovae, therefore, enhanced turbulent flows are expected. We analyse high-quality Karl G. Jansky Very Large Array observations of the neutral hydrogen gas content of DDO43, a relatively nearby irregular dwarf galaxy. The line wings of neutral hydrogen spectral lines, which provide insights into local enhanced velocity dispersion, are investigated together with far-ultraviolet data, tracing emissions from massive star-forming regions. We find very weak correlations with both higher and lower velocity areas.

Keywords

• line: profiles
• turbulence
• methods: data analysis
• surveys
• galaxies: ISM
• radio lines: ISM