Ultraviolet spectroscopy of the extreme B supergiants P Cygni and Zeta-1 Scorpii

Details Ultraviolet spectroscopy of the extreme B supergiants P Cygni and Zeta-1 Scorpii Ultraviolet spectroscopy of the extreme B supergiants P Cygni and Zeta-1 Scorpii

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...233..913h&link_type=abstract

Astrophysical Journal, Part 1, vol. 233, no. 3, Nov. 1, 1979, p. 913-918.

Astronomy and Astrophysics

Astronomy

19

B Stars, Interstellar Extinction, O Stars, Spaceborne Astronomy, Supergiant Stars, Ultraviolet Spectroscopy, Iue, Line Spectra, Radial Velocity, Stellar Atmospheres, Ultraviolet Spectra

Scientific paper

High-dispersion IUE spectra of P Cyg and Zeta-1 Sco are presented. Both show extreme line blanketing by Fe III and similar ions, formed in a low-velocity stellar wind. P Cygni also shows the same phenomenon in Fe II, at somewhat higher velocity, and appears to be cooler and less reddened then its visible spectrum suggests. Both stars show weak evidence for wind velocities up to about 400 km/s, but do not have high-velocity winds typical of OB supergiants. The interstellar extinction is discussed for each star, and their fundamental parameters estimated and compared.

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