Astron. Astrophys. Suppl. Ser.
Volume 120, Number 1, November II 1996
|Page(s)||41 - 56|
|Published online||15 November 1996|
Deep H survey of the Milky Way. III. The l = 338 area *
Observatoire de Marseille, 2 Place Le Verrier, F-13248 Marseille Cedex 04, France
2 Observatorio Astronómico de Córdoba, Laprida 854, 5000 Córdoba, Argentina
3 Observatoire de Grenoble BP. 53X Grenoble Cedex, France
Send offprint request to: Y.M. Georgelin
Accepted: 5 April 1996
The Galactic plane has been observed between l = 337 and l = 342 in the frame of an Hα Survey of the Southern Milky Way. This area is known to be rich in radio sources but poor in Hα emission. The analysis of high resolution profiles of the Hα emission observed in this direction nevertheless enabled to distinguish 6 different velocity components: 2 faint layers of diffuse ionized hydrogen at 0 and -12 km (VLSR), 2 brighter layers at -28 and -39 km including individual HII regions, a faint patch at -50 km and two isolated bright HII regions at -61 km . Combining these Hα observations with stellar and radio data we conclude about the most probable distances for the different components.
Key words: interstellar medium: HII regions / Galaxy: structure
© European Southern Observatory (ESO), 1996