Abstract
The neutral atomic hydrogen (H I) in nine dwarf irregular galaxies, with absolute magnitude fainter than M B = − 14 m : LGS-3, UGC 4483, DDO 69 (Leo A), C Vn dwA, DDO 155 (GR 8), DDO 187, Sag DIG, DDO 210, DDO 216 (Pegasus), was mapped with the Very Large Array (VLA) at a typical resolution of ≤ 18″ and velocity resolution of 6 km s −1 during 1981.9 to 1983.2. These observations probe the internal motions and the interstellar medium in these faint galaxies, and provide a dynamical mass determination. The nine dwarf irregular galaxies, at the extreme faint end of the galaxy luminosity function, are H I rich, with high M H /L B ratios ranging between 0.2 and 7 (except for LGS-3)
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