Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.255..227e&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 255, March 15, 1992, p. 227-236. Research supported by
Astronomy and Astrophysics
Astronomy
34
Abundance, Infrared Astronomy, Stellar Winds, Wolf-Rayet Stars, Astronomical Photometry, Carbon, Helium, Infrared Spectra, Recombination Reactions
Scientific paper
The method developed by Hummer et al. (1982) is used to analyze the IR (1.0-3.4 microns) recombination lines of six WC stars. Some low-energy-level transitions are found to be optically thick or formed through other processes. There is a clear decrease of derived ionic abundances with wavelength, attributed to an increase in continuous free-free opacity. It is shown on the basis of this observation that the ionization stratification of the wind can be estimated, and that C/He abundance ratios can be reliably determined by defining a zone in the stellar wind, the same for all ions, in which ionic abundances are derived, thus overcoming previous difficulties inherent in the method. The derived C/He ratios range from 0.07 to 0.41, confirming a trend with WC subtype for the small sample considered. The C(4+)/He(2+) ratio is found to provide a good estimate of the C/He ratio.
Eenens Philippe R. J.
Williams Peredur M.
No associations
LandOfFree
An infrared view of Wolf-Rayet WC subtypes. II - Abundances in stratified winds does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with An infrared view of Wolf-Rayet WC subtypes. II - Abundances in stratified winds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An infrared view of Wolf-Rayet WC subtypes. II - Abundances in stratified winds will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1223103