Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.221..155t&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 221, July 1, 1986, p. 155-168.
Astronomy and Astrophysics
Astronomy
28
Gas Dynamics, Herbig-Haro Objects, Orion Nebula, Astronomical Models, Mass Distribution, Oxygen Ions, Stellar Mass Ejection, Stellar Winds, Wind Velocity
Scientific paper
The authors present observations of the kinematic structure of the [O I] λ6300 gas in M42 in a 3.8×2.9 arcmin2 field in the vicinity of the Kleinmann-Low nebula. High-velocity blueshifted material with velocities up to 500 km s-1 are found in discrete clumps over an approximately triangular zone, whose apex is situated near the IR cluster. Careful examination of the line-profile data shows that whenever high-velocity wings are detected they are invariably accompanied by enhanced [O I] emission at the systemic velocity of the nebula. In addition, the authors report the discovery of a further region of high-velocity [O I] material. They discuss these observations in the context of current theoretical models for the production of Herbig-Haro objects, and conclude that none of these models provides a viable explanation for the Orion objects. The authors are therefore led to propose two new models for their formation, which are discussed in detail.
Axon David J.
Dyson John E.
Hughes Scott S.
Taylor Karen
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