Structure of the H II regions M8 and M20. II. Electron densities.
Abstract
Monochromatic photographs were obtained in each of the sulfur lines [S ii] AA6717, 6731 in M8 and M20 using wide slits with a medium dispersion. Observational evidence is provided for shockfront structure at bright rims in the H ii regions M8 and M20, and for interaction between the ionized gas and the absorption lanes in M20. Subject heading: nebulae
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 1973
- DOI:
- 10.1086/152308
- Bibcode:
- 1973ApJ...184...93B