Survey of high-velocity molecular gas in the vicinity of Herbig-Haro objects. I

A survey of high-velocity molecular gas toward 49 Herbig-Haro objects is presented. Observations of the 12CO 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 LkHα 234 and the second near a far-infrared source. The relationship between optical Herbin-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. We estimate that energetic outflows characterized by mass loss rates > or =10-7 M/sub sun/ yr-1 occur for at least 104 yr once in the lifetime of all stars with masses greater than 1M/sub sun/