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Highly ionized atoms observed with CopernicusBased on high-resolution observations using the Princeton satellite/spectrometer on Copernicus the O VI doublet is discussed in detail, in conjunction with data for the resonance lines of N V, Si IV, and S IV reported in five stars. The temperature, density, and the possible extent of the O VI producing region are discussed. The ratio N(S IV)/N(O VI) is used to derive a lower limit to the temperature in the O VI producing region. In near pressure equilibrium with normal interstellar clouds and H II regions minimum densities are found to be consistent with a hot plasma.
Document ID
19750030104
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
York, D. G.
(Princeton University New Observatory, Princeton, N.J., United States)
Date Acquired
August 8, 2013
Publication Date
November 1, 1974
Publication Information
Publication: Astrophysical Journal
Volume: 193
Subject Category
Astrophysics
Accession Number
75A14176
Funding Number(s)
CONTRACT_GRANT: NAS5-1810
Distribution Limits
Public
Copyright
Other

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