Other
Scientific paper
Jun 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979aj.....84..812p&link_type=abstract
Astronomical Journal, vol. 84, June 1979, p. 812-830. Research supported by the National Research Council of Canada.
Other
72
Astronomical Catalogs, B Stars, Linear Polarization, Stellar Spectra, Balmer Series, Emission Spectra, Error Analysis, Paschen Series
Scientific paper
Intermediate-band linear-polarization observations of 70 Be stars are presented. The intrinsic polarization and the interstellar polarization of these stars are determined. About half the stars observed have some intrinsic polarization. For about 25% of the sample the intrinsic polarization may be determined with reasonable accuracy from the available data; for another 25% of the sample intrinsic polarization seems to be present, but its magnitude is uncertain. The intrinsic polarization of Be stars is found to decrease abruptly across the Balmer series limit, in agreement with theoretical expectations, and a smaller decrease across the Paschen series limit is also found. The slope in the Paschen continuum polarization is found to vary from star to star, possibly indicating differences in envelope density or temperature. Time-variable polarization is seen in many Be stars, and in one case (Omicron And) the change in polarization appears to be correlated with spectroscopic changes.
Bastien Pierre
Landstreet John Darlington
Poeckert R.
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