Multicolor linear polarimetry of Betelgeuse and Antares

Details Multicolor linear polarimetry of Betelgeuse and Antares Multicolor linear polarimetry of Betelgeuse and Antares

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....95..215t&link_type=abstract

Astronomy and Astrophysics, vol. 95, no. 2, Mar. 1981, p. 215-220.

Astronomy and Astrophysics

Astrophysics

22

Linear Polarization, Polarimetry, Stellar Atmospheres, Stellar Spectrophotometry, Atmospheric Composition, Color, Interstellar Matter, Photosphere, Silicon, Time Dependence

Scientific paper

Multicolor linear polarimetry of Alpha Ori and Sco confirms in a qualitative way the ideas about large-scale moving elements in these stellar atmospheres, as suggested by Schwarzschild (1975). For one well-observed scattering element, a relation between the degree of ionization and the fraction of silicon condensed in grains is deduced. Sizable residuals remain at short and long wavelengths. Time variations of the short-wavelength residuals suggest time variations in the dust formed in the stellar atmospheres.

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