Infrared spectra of gam2 Vel and ZET Pup.
1974; IOP Publishing; Volume: 187; Linguagem: Inglês
10.1086/152591
ISSN1538-4357
AutoresT. G. Barnes, David L. Lambert, A. E. Potter,
Tópico(s)solar cell performance optimization
Resumoview Abstract Citations (31) References (23) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Infrared spectra of gamma 2 Velorum and zeta Puppis. Barnes, T. G. ; Lambert, D. L. ; Potter, A. E. Abstract Observations of y2 Vel and Pup are presented for the spectral region 580() l 1,000 cm-1 (1.7- 0.9 M) at resolutions of 2 and 4 cm-1, respectively. This constitutes the first reported spectroscopy of a Wolf. Rayet star beyond 1.1 . The new spectral region contained numerous emission features for the WC8 component of y2 Vel, but only the Pfl line in absorption for the O4f star Pup. Line identifications are given for y2 Vel and are shown to be consistent with visual spectroscopy. The species identified are H, He i-li, and C ii-iv. in the spectral region 0.8-il our identifications are in excellent accord with previous spectroscopy. However, after correcting the emission-line intensities for dilution by the O9 I component of y2 Vel, we find the lines to be 2-5 times stronger than the same lines in the WC7 star HD 192103, as given by Kuhi. This is attributed in part to a 1-M excess in HD 192103 and in part to a lower excitation in y2 Vel. From the absence of He I Al 0830 in Pup we are able to exclude the presence of an oft-conjectured WN companion. The blueshifted absorption component to He I Al 0830 in y2 Vel and the line profile of the He ii A10,124 emission feature in Pup are also discussed. Subject headings: line identifications - spectra, infrared - stars, individual - Wolf-Rayet stars Publication: The Astrophysical Journal Pub Date: January 1974 DOI: 10.1086/152591 Bibcode: 1974ApJ...187...73B full text sources ADS | data products SIMBAD (6)
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