The surprising presence of an OI line in a Wolf-Rayet spectrum

Details The surprising presence of an OI line in a Wolf-Rayet spectrum The surprising presence of an OI line in a Wolf-Rayet spectrum

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...253l..37a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 253, no. 2, Jan. 1992, p. L37-L39.

Astronomy and Astrophysics

Astrophysics

5

Binary Stars, Oxygen Spectra, Stellar Spectra, Wolf-Rayet Stars, B Stars, Paschen Series, Peculiar Stars

Scientific paper

Oxygen is usually detected in Wolf-Rayet spectra as a highly ionized species. Surprisingly, the signature of neutral oxygen has been found in the spectrum of WR158, a WN7 star; in addition, anomalous intensity ratios of some Pashen lines were also detected. Various interpretations can be suggested. It is possible to have a composite spectrum superposition of a Be spectrum, and of a WN7 spectrum. If it is not due to chance coincidence alignment, this would imply a system combining a WR and a Be star, which is rather unusual. Another alternative is that WR158 is a single object, a WN7 star with, however, nonstandard environmental interactions.

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