Discovery of a family of Herbig-Haro objects in M42 Implications for the geometry of the high velocity molecular flow?

Details Discovery of a family of Herbig-Haro objects in M42 Implications for the geometry of the high velocity molecular flow? Discovery of a family of Herbig-Haro objects in M42 Implications for the geometry of the high velocity molecular flow?

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.207..241a&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 207, March 15, 1984, p. 241-261.

Astronomy and Astrophysics

Astronomy

87

Flow Geometry, Flow Velocity, Herbig-Haro Objects, Molecular Flow, Orion Nebula, Stellar Spectrophotometry, Electronography, Interstellar Gas, Line Spectra, Molecular Clouds, Oxygen Spectra, Stellar Winds

Scientific paper

The results of a survey of Herbig-Haro (HH) objects in M42 using direct electronographic imagery in forbidden O I 6300, H-alpha 6563, and the continuum are presented. An extensive family of HH objects associated with M42 HH1 has been discovered to the northwest of the BN infrared complex in Orion. All the objects possess high velocity blue wings of a velocity up to -400 km/s with respect to the forbidden O I ambient gas, implying stellar winds of at least this magnitude. The objects are most likely excited by a collimated protostellar wind originating from a source within the BN complex which is hidden from view by an optically thick obscuring molecular disk. The HH objects themselves see directly to the exciting source down the collimated cone. The same highly energetic wind is responsible for the high-velocity molecular gas.

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