Other
Scientific paper
Dec 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...242..638m&link_type=abstract
Astrophysical Journal, Part 1, vol. 242, Dec. 1, 1980, p. 638-645.
Other
29
Absorption Spectroscopy, Binary Stars, Emission Spectra, Hot Stars, Stellar Spectra, Wolf-Rayet Stars, Balmer Series, Electron Scattering, Helium Ions, Hydrogen, Milky Way Galaxy, Nitrogen Ions, Photometers, Spectroscopic Telescopes, Stellar Envelopes
Scientific paper
Coude observations indicate that HD 177230 is probably not a binary. The 15 km/s scatter in the radial velocities places stringent constraints on possible periods and orbital inclinations. There is a tantalizing hint of possible variability in the emission line strengths. The spectrum of this WN8 standard contains several surprises. Four entire N ionization states are represented, with emission lines of N II, N III, N IV, and N V present. The stronger He I triplet lines show a classical Beals Type III P Cygni profile, which is interpreted as an indication that the envelope is fairly dense compared to other WN8 stars. Unlike many other late WN stars, HD 177230 does not appear to have an appreciable amount of hydrogen present in its envelope.
Conti Peter
Massey Pedro
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