Spectroscopic evidence for rapid blob ejection in Wolf-Rayet stars

Details Spectroscopic evidence for rapid blob ejection in Wolf-Rayet stars Spectroscopic evidence for rapid blob ejection in Wolf-Rayet stars

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...334.1038m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 334, Nov. 15, 1988, p. 1038-1043. NSERC-supported research.

Astronomy and Astrophysics

Astrophysics

118

Astronomical Spectroscopy, Stellar Mass Ejection, Wolf-Rayet Stars, Emission Spectra, Helium, Line Spectra, O Stars, Signal To Noise Ratios, Stellar Winds

Scientific paper

The authors have monitored the five bright Cygnus WN stars in the unblended He II λ5411 emission line at high spectral resolution and high signal-to-noise ratio during four or five nights. Typical data are presented here for the two single WN6 stars HD 191765 and HD 192163. The spectra reveal narrow emission bumps superposed on a broad, smooth background wind profile, with FWHM ≈ 2 - 10 Å and height ≤10% in continuum units for HD 191765. The bumps always appear to accelerate outward along with the general wind, on a time scale of hours.

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