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A survey of high-velocity molecular gas in the vicinity of Herbig-Haro objects. I
Edwards, S.; Snell, R. L.
AA(Smith College, Northampton, MA), AB(Five College Radio Astronomy Observatory, Amherst, MA)
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 270, July 15, 1983, p. 605-619. (ApJ Homepage)
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NASA/STI Keywords:
Herbig-Haro Objects, Molecular Gases, Stellar Winds, Far Infrared Radiation, Flow Velocity, H Alpha Line, Main Sequence Stars, Nebulae, Stellar Mass Ejection
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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.

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