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Hubble Space Telescope images and follow-up spectroscopy of the Orion nebulaRecently published HST images of the Orion nebula reveal elephant-trunk structures, an apparent jet of material, and fine-scale structure in the Herbig-Haro object HH2, which is located at the base of an elephant trunk. High-resolution spectroscopy shows that the apparent jet is actually an ionization front seen edge-on. HH2 shows a complex structure in the several stages of ionization observed. There seem to be two velocity systems characterized by a bright central region and an accompanying shell-like emission. These two systems are most likely to be the result of a bow shock and corresponding Mach disk formed from the interaction of a collimated jet and the ambient gas of the nebula.
Document ID
19910066108
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
O'Dell, C. R.
(Rice Univ. Houston, TX, United States)
Wen, Zheng
(Rice University Houston, TX, United States)
Hester, J. J.
(California Institute of Technology Pasadena, United States)
Date Acquired
August 14, 2013
Publication Date
August 1, 1991
Publication Information
Publication: Astronomical Society of the Pacific, Publications
Volume: 103
ISSN: 0004-6280
Subject Category
Astrophysics
Accession Number
91A50731
Distribution Limits
Public
Copyright
Other

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