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Title:
Narrow emission line O VI planetary nebulae nuclei
Authors:
Stanghellini, L.; Kaler, J. B.; Shaw, R. A.
Affiliation:
AA(Univ. of Illinois, Urbana, IL, US), AB(Univ. of Illinois, Urbana, IL, US), AC(Space Telescope Science Inst., MD, US)
Publication:
Astronomy and Astrophysics (ISSN 0004-6361), vol. 291, no. 2, p. 604-612 (A&A Homepage)
Publication Date:
11/1994
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
EMISSION SPECTRA, LINE SPECTRA, OXYGEN SPECTRA, PLANETARY NEBULAE, PLASMA DIAGNOSTICS, STELLAR EVOLUTION, STELLAR SPECTRA, ABUNDANCE, ASYMPTOTIC GIANT BRANCH STARS, HERTZSPRUNG-RUSSELL DIAGRAM, INTERSTELLAR EXTINCTION
Bibliographic Code:
1994A&A...291..604S

Abstract

We present a study of the characteristics of four planetary nebulae (PNs) with O VI nuclei: NGC 1501, IC 1297, IC 1747, and K 1-16. They have high temperature central stars with well-separated narrow O VI lambda 3811, 34 emission lines. We present intensities of the nebular lines, equivalent widths of the stellar lines, and, where possible, plasma diagnostics and nebular ionic abundance. In order to test the evolutionary stage of the central stars relative to the nebular properties we calculate Zanstra temperatures and luminosities. We find that the stars have similar physical characteristics and thus represent approximately the same phase of post-asymptotic giant branch (P-AGB) evolution. Their O VI absolute fluxes correlate reasonably well to the central stars positions on the Hertzsprung-Russell diagram.

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