C III spectra in WC Wolf-Rayet stars - Does collisional excitation dominate?

Details C III spectra in WC Wolf-Rayet stars - Does collisional excitation dominate? C III spectra in WC Wolf-Rayet stars - Does collisional excitation dominate?

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...406..708k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 406, no. 2, p. 708-713.

Astronomy and Astrophysics

Astrophysics

Atomic Spectra, Carbon Stars, Excitation, Stellar Spectra, Wolf-Rayet Stars, Atomic Excitations, Collision Parameters, Photoionization, Recombination Coefficient

Scientific paper

A direct comparison of the spectra emitted by an improved collisionally excited C III atomic model, with observations of C III spectra in Wolf-Rayet WC stars, shows agreement for UV, visible, and near-infrared lines including lines usually considered to be recombination lines. The agreement implies high-density and temperature source conditions corresponding to log (Ne Te) is greater than 16 as a lower limit, whereas most current modeling assumes log (Ne Te) is less than 15.5. This raises questions concerning the photoionization/recombination assumptions on which most WR modeling is based. Recent models are discussed from this point of view.

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