Bibcode
Mendez, R. H.; Herrero, A.; Manchado, A.; Kudritzki, R. P.
Bibliographical reference
Astronomy and Astrophysics (ISSN 0004-6361), vol. 252, no. 1, Dec. 1991, p. 265-271. Research supported by Instituto de Astrofisica de Canarias and Universitaet Muenchen.
Advertised on:
12
1991
Citations
18
Refereed citations
17
Description
Emission lines in the spectra of WC9 stars have been studied. It is
shown that there are clear differences between the spectra of BD + 30
3639 and the central star of He2-99. It is argued that there are no
systematic spectral differences between the WC9 CSPN and the Pop.I WC9
stars: both kinds of WC9 stars show a substantial and overlapping range
of emission line strengths and widths. It is suggested that the current
concept (that the spectra of WC9 CSPN are systematically different from
the spectra of Pop.I WC9 stars because they are an order of magnitude
less massive) be replaced by a more plausible concept that attributes
the spectral differences to the different importance of radiation
pressure in the formation of the stellar spectrum.