Computer Science
Scientific paper
Apr 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985nas....82.2202f&link_type=abstract
National Academy of Sciences, Proceedings (ISSN 0027-8424), vol. 82, April 1985, p. 2202-2206.
Computer Science
Chemical Composition, Planetary Nebulae, Spectrum Analysis, Abundance, Helium, Ion Density (Concentration), Line Spectra, Sun, Ultraviolet Spectra, Visible Spectrum
Scientific paper
The planetary nebula NGC 6537 appears to be an irregular bipolar object. Conventional procedures have been employed to observe the spectrum of NGC 6537 with the image dissector scanner at the Lick 3-m telescope. Both red- and green-sensitive tubes were employed in order to cover the spectrum from the practical UV limit near lambda 3300 A to the near-infrared limit near lambda 8600 A. The instrumental response function was determined on the basis of the observation of suitable comparison stars. On Oct. 23, 1984, observations with the International Ultraviolet Explorer (IUE) were obtained. A table containing the optical region spectrum of NGC 6537 is presented along with a table providing the UV fluxes, a table listing the ionic concentrations, and a table with data describing the chemical composition of NGC 6537. Attention is given to theoretical models and the determination of the nebular chemical composition, and aspects of plasma diagnostics.
Aller Lawrence H.
Czyzak Stanley J.
Feibelman Walter
Keyes Charles D.
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