THE IONIZATION OF ACCRETION FLOWS IN HIGH-MASS STAR FORMATION: W51e2

摘要

Previous observations show that the hypercompact H Ⅱ region W51e2 is surrounded by a massive molecular accretion flow centered on the H Ⅱ region. New observations of the H53α radio recombination line made with the VLA at 0.45″ angular resolution show a ve