HI y HII en Scorpius-Ophiuchus

Abstract

The distribution of neutral hydrogen is studied in the region defined by eq. (1). After subtracting a broad Gaussian component, which could be interpreted as the emission of a hot inter-cloud medium, a Gaussian analysis of the residual 21-cm profiles was performed. The resultant components, of small velocity dispersion, have counterparts in interstellar absorption lines of Na I and Ca II. They could have originated by an expanding phenomenon (like a supernova explosion) produced within the gas related to feature A of Lindblad by stars of the association Sco OB2. As the paper will be published elsewhere, we give here only a synthesis.