Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apjs...70..213k&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 70, May 1989, p. 213-237. Research supported by the University of
Astronomy and Astrophysics
Astrophysics
28
Planetary Nebulae, Stellar Spectra, Wolf-Rayet Stars, Emission Spectra, Interstellar Extinction, Stellar Magnitude, Stellar Temperature, Stellar Winds, Visible Spectrum
Scientific paper
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.
Feibelman Walter A.
Kaler James B.
Lutz Julie H.
Shaw Richard A.
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