Observations of Shocked [FEII] and H₂ Line Profiles in Orion Bullet Wakes

J. Tedds, P. W. J. L. Brand, M. G. Burton, A. Chrysostomou, A. J. L. Fernandes

Abstract
Recent near-IR imaging of the Orion molecular cloud has revealed a complex of dense bullets, visible as [FeII] emitting HH-objects at the tips of H₂ wakes, ejected explosively from the cloud core. Having resolved individual bow-shock structures for the first time in this bright source, we have observed [FeII] 1.644μm velocity profiles of selected bullets and H₂ 1-0 S(1), 2.122μm velocity profiles for a series of positions along and across the corresponding bow-shock wakes. We present observed profiles for the bullet M42 HH1 and its associated wake and compare with theoretical bow-shock models.

Astrophysics and Space Science
Volume 224, Page 139
February 1995

DOI: 10.1007/BF00667836
ADS Bibliographic code: 1995Ap&SS.224..139T