High resolution HI observations of dark clouds. II. L 1551.
Abstract
High-resolution H-I 21-cm line observations of L 1551 have been used to construct maps with an angular resolution of 1.5 arcmin and a velocity resolution of 1.3 km/s. The H I associated with the undisturbed molecular gas is found to have a simple structure which can be explained by heating due to the interstellar radiation field. H-I emission is also noted at velocities that are blueshifted or redshifted with respect to the quiet molecular gas, with a fraction of this emission being associated with the bipolar outflow in L 1551. It is suggested that the blueshifted H-I emission may be due to disruption of the cloud envelope by the bipolar flow.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- June 1989
- Bibcode:
- 1989A&A...216..215V
- Keywords:
-
- H I Regions;
- High Resolution;
- Interstellar Matter;
- Molecular Clouds;
- Radio Astronomy;
- Centimeter Waves;
- Herbig-Haro Objects;
- Interstellar Radiation;
- Synthetic Apertures;
- Very Large Array (Vla);
- Astrophysics