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The nebular velocity structure of AG PegasiUltraviolet emission of the symbiotic star AG Peg which shows periodic variations in the central radial velocity and total flux of several emission lines was studied. Seventeen high dispersion archival SWP spectra covering the period from 1978.6 to 1986.9 were examined. Gaussian profiles were fit to each of the narrow emission lines of O III, N III, O IV, Si IV, C III, and Si III. Radial velocity curves with an amplitude of 15 to 20 km/sec were measured for the N III 1748.6 A, 1749.7 A lines, the O III 1660.8 A, 1666.2 A lines, and the C III 1908.7 A line. The O IV and Si IV lines were generally too weakly exposed to derive reliable velocity curves, while the Si III line was often overexposed. The N III, O III, and C III line fluxes are correlated with phase. These line flux and velocity changes are consistent with formation of the lines near the red giant.
Document ID
19890007196
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Oliversen, Nancy A.
(IUE Observatory Lanham, MD., United States)
Evans, Nancy R.
(Toronto Univ. (Ontario). Madison., United States)
Anderson, Christopher M.
(Wisconsin Univ.)
Date Acquired
September 5, 2013
Publication Date
June 1, 1988
Publication Information
Publication: ESA, Proceedings of the Celebratory Symposium on a Decade of UV Astronomy with the IUE Satellite, Volume 2
Subject Category
Astronomy
Accession Number
89N16567
Funding Number(s)
CONTRACT_GRANT: NAS5-28749
Distribution Limits
Public
Copyright
Other
Document Inquiry

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