Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...325..784s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 325, Feb. 15, 1988, p. 784-794. Research supported by the Niels Stensen Fou
Astronomy and Astrophysics
Astrophysics
26
B Stars, Stellar Mass Ejection, Stellar Spectrophotometry, Ultraviolet Spectra, Visual Observation, Carbon, Continuous Spectra, H Alpha Line, Silicon, Stellar Winds
Scientific paper
Combination of long-term optical polarimetric, photometric, spectrometric, and ultraviolet spectral data have confirmed that all observed portions of ω Ori's outer atmosphere are variable on a variety of time scales. The spectacular polarization episodes are correlated with the presence of continuum flux and color changes but are not correlated with the strength of the highly ionized stellar wind or with episodes of enhanced wind variability. A straightforward interpretation of the available data is that the continuum polarization, continuum-magnitude changes, and color changes are produced in a presumably equatorial disk close to the stellar photosphere. The highly ionized stellar wind, which is expected to be produced relatively close to the star, is apparently spatially separated from the disk, probably at high latitudes, although different radii cannot be ruled out.
Barker Paul K.
Grady Carol A.
Guinan Edward F.
Hayes Daniel P.
Henrichs Hubertus F.
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