Neutral hydrogen observations of the extremely metal-poor blue compact dwarf galaxy SBS 0335-052

摘要

We present VLA H I observations of one of the most metal-deficient blue compact dwarf (BCD) galaxies known, SBS 0335-052, which sports an oxygen abundance of only 1/40~(th) that of the Sun. We study the structure and dynamics of the neutral gas in this chemically young object at a spatial resolution of 20" * 15" (5.4 * 3.9 kpc at a distance of 54 Mpc), and a velocity resolution of 21.2 km s~(-1).