Polarization investigations in four peculiar supergiants with high IR excess

Details Polarization investigations in four peculiar supergiants with high IR excess Polarization investigations in four peculiar supergiants with high IR excess

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...181...31j&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 181, no. 1, July 1987, p. 31-33. Research supported by the Department of Space

Astronomy and Astrophysics

Astronomy

25

Infrared Radiation, Peculiar Stars, Polarized Electromagnetic Radiation, Stellar Atmospheres, Supergiant Stars, Astronomical Photometry, Binary Stars, Far Infrared Radiation, Infrared Astronomy Satellite, Interstellar Matter

Scientific paper

The first polarimetric measurements of four peculiar supergiants (HD 89353, HD 163506, HD 161796, and HD 101584) with high IR excess have been carried out. These investigations indicate the presence of large dust grains (larger than 300 nm) in the dust shells, generally uniformly distributed around the stars. HD 89353 shows large changes in polarization angle with wavelength, which can be attributed to the presence of two dust shells containing, respectively, large (about 0.8-micron) and small (about 0.05-micron) dust particles.

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