H-alpha imaging of the Local Volume galaxies I. The NGC 6946 galaxy group

Abstract

We present new H-alpha imaging of all known dwarf irregular companions to NGC 6946: UGC 11583, KK 251, KK 252, KKR 55, KKR 56, Cepheus 1, KKR 59, and KKR 60. The galaxies span a range of blue absolute magnitudes of [-13.6, -17.6], relative gas content of [0.1, 2.5] M_sun/L_sun, current star formation activity of [0.2, 5.2]10^-2 M_sun yr^-1, and timescale to exhaust the current gas supply of [6, 86] Gyr.

arXiv comment4 pages, 1 figure. accepted to Research Note in Astronomy and Astrophysics

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Cited by in corpus (14)

• The Local Volume HI Survey (LVHIS)
• Star formation properties in the Local Volume galaxies via $H\alpha$ and FUV fluxes
• A view of the M81 galaxy group via the H-alpha window
• More galaxies in the Local Volume imaged in H-alpha
• Green Bank Telescope observations of low column density HI around NGC 2997 and NGC 6946
• Emission sparks around M 81 and in some dSph galaxies
• H-alpha Survey of the Local Volume: Isolated Southern Galaxies
• H-alpha survey of low-mass satellites of the neighbouring galaxies M31 and M81
• Molecular Gas Properties of the Giant Molecular Cloud Complexes in the Arms and Inter-arms of the Spiral Galaxy NGC 6946
• H-alpha survey of nearby dwarf galaxies
• Astrophysics in 2005
• Survey of H-alpha emission from thirty nearby dwarf galaxies
• New Halpha flux measurements in nearby dwarf galaxies
• Star-Forming Regions in Dwarf Galaxies of the Local Volume