Polarimetric investigation of southern early-spectral-type objects with circumstellar envelopes - Classical and peculiar Be stars

Details Polarimetric investigation of southern early-spectral-type objects with circumstellar envelopes - Classical and peculiar Be stars Polarimetric investigation of southern early-spectral-type objects with circumstellar envelopes - Classical and peculiar Be stars

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992sval...18..182g&link_type=abstract

Soviet Astronomy Letters, Vol. 18, p. 182; Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 18, no. 5, May 1992, p. 454-

Astronomy and Astrophysics

Astronomy

11

Astronomical Polarimetry, B Stars, Early Stars, Peculiar Stars, Stellar Spectra, Stellar Envelopes, Ubv Spectra

Scientific paper

Results of UBVR polarimetry of eight classical and five peculiar Be stars, which was carried out in 1989, are presented. Most of the polarization spectra of classical Be stars can be explained by electron scattering in a gaseous envelope, taking into account its selective opacity and the contribution of the intrinsic emission. Dust envelopes play a significant role in the formation of the peculiar Bep star polarization. Almost all the objects studied exhibit a significant spectral variability of polarization, which is chiefly due to the variation of the total amount and to the redistribution of the scattering matter. Lambda Eri exhibited variability, which may be a sign of a magnetic field with B of about 100 G, and HD 163296 showed anomalous variations of the polarization spectrum.

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