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Metallic line profiles of the AO V star VegaHigh dispersion ultrahigh signal to noise Reticon spectra of Vega were obtained with the coude spectrograph of the 1.2 m telescope. A mean signal to noise ratio of 2500 over the spectral region lambdas from 3825 to 5435 was achieved. Examination of the line profiles confirmed the presence of two different types of profiles which were previously seen in IIIaJ and lower signal to noise Reticon spectra. The profiles of the strong lines are essentially classical rotational profiles with enhanced wings which are slightly stronger than expected while those of weak lines are clearly flat-bottomed resulting in a trapezoidal appearance. A few possible theoretical explanations are presented.
Document ID
19910069700
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Gulliver, Austin F.
(Brandon University Canada)
Adelman, Saul J.
(The Citadel Charleston, SC, United States)
Cowley, Charles R.
(Michigan, University Ann Arbor, United States)
Fletcher, J. M.
(Dominion Astrophysical Observatory Victoria, Canada)
Date Acquired
August 14, 2013
Publication Date
October 10, 1991
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 380
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
91A54323
Funding Number(s)
CONTRACT_GRANT: NAG5-921
Distribution Limits
Public
Copyright
Other

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