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A study of H-alpha velocities in NGC 1499, NGC 7000, and IC 1318B/CMultiple slit echelle spectrograph observations of the H-alpha emission line are used to map the radial velocities of the California Nebula (NGC 1499), the North American Nebula complex (NGC 7000 and IC 5070), and IC 1318B/C. The California Nebula is singularly constant in velocity, considering its geometry. The North American Nebula complex reflects a very simple, classical dynamical picture. The expansion discovered earlier in IC 1318B/C is confirmed, detailed, and the model refined. The new data, along with that in earlier papers of this series, show that stellar wind acceleration and champagne flow mechanisms both play important roles in determining the evolution of H II regions.
Document ID
19830053408
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Fountain, W. F.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Gary, G. A.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Odell, C. R.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 11, 2013
Publication Date
June 1, 1983
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 269
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
83A34626
Distribution Limits
Public
Copyright
Other

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