A survey of high-velocity molecular gas in the vicinity of Herbig-Haro objects. I.
Abstract
A survey of high-velocity molecular gas toward 49 Herbig-Haro objects is presented. Observations of the (C-12)O J = 1-0 transition obtained with the 14 m telescope of the Five College Radio Astronomy Observatory reveal three new spatially extended high-velocity molecular outflows. One is in the NGC 1333 region near HH 12, and two are in the NGC 7129 region, the first near LkH-alpha 234 and the second near a far-infrared source. The relationship between optical Herbig-Haro emission knots and large-scale motions of the ambient molecular material is investigated, and the properties of high-velocity molecular outflows in the vicinity of Herbig-Haro objects are discussed. Of 11 energetic outflows in the vicinity of Herbig-Haro objects, eight are found in four pairs separated by 0.2-1.0 pc. It is estimated that energetic outflows characterized by mass loss rates equal to or greater than 10 to the -7th solar masses per yr occur for at least 10,000 yr once in the lifetime of all stars with masses greater than 1 solar mass.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- July 1983
- DOI:
- 10.1086/161152
- Bibcode:
- 1983ApJ...270..605E
- Keywords:
-
- Herbig-Haro Objects;
- Molecular Gases;
- Stellar Winds;
- Far Infrared Radiation;
- Flow Velocity;
- H Alpha Line;
- Main Sequence Stars;
- Nebulae;
- Stellar Mass Ejection;
- Astrophysics