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Title:
A case study of a WC planetary nebula nucleus - Henize 2-99
Authors:
Kaler, James B.; Shaw, Richard A.; Feibelman, Walter A.; Lutz, Julie H.
Affiliation:
AA(Illinois, University, Urbana), AB(Lick Observatory, Santa Cruz, CA), AC(NASA, Goddard Space Flight Center, Greenbelt, MD), AD(Washington State University, Pullman)
Publication:
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 70, May 1989, p. 213-237. Research supported by the University of Illinois. (ApJS Homepage)
Publication Date:
05/1989
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
PLANETARY NEBULAE, STELLAR SPECTRA, WOLF-RAYET STARS, EMISSION SPECTRA, INTERSTELLAR EXTINCTION, STELLAR MAGNITUDE, STELLAR TEMPERATURE, STELLAR WINDS, VISIBLE SPECTRUM
DOI:
10.1086/191338
Bibliographic Code:
1989ApJS...70..213K

Abstract

The WC spectrum of the nucleus of the planetary nebula Henize 2-99. Fluxes are given, emission lines are identified, and blends are described. The most powerful emissions are C III, C II, and C IV. O, H, and Si lines are also observed, but little stellar nitrogen is found except for N V. The interstellar extinction is estimated at c = 0.9 + or - 0.2. Blackbody, Zanstra, and Stoy temperatures are found to be 70,000 K, 26,000 K, and 27,000 K, respectively. It is shown that He 2-99 is binebulous with a prominent enhancement in H-alpha along the minor axis. The structural characteristics of He 2-99 are very similar to BD +30 deg 3639 and NGC 40.

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