A polarimetric survey of symbiotic stars

Details A polarimetric survey of symbiotic stars A polarimetric survey of symbiotic stars

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26as...86..227s&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 86, no. 2, Dec. 1990, p. 227-249. Research supported by CNPq

Astronomy and Astrophysics

Astronomy

17

Binary Stars, Linear Polarization, Near Infrared Radiation, Symbiotic Stars, H Alpha Line, Infrared Astronomy Satellite, Magnetic Fields, Stellar Winds, Time Dependence

Scientific paper

Optical and near-infrared polarization observations of 24 symbiotic stars, 14 observed with polarimetry for the first time are presented. In combination with published data, it is found that about 50 percent of the symbiotics observed polarimetrically show evidence for intrinsic polarization. The results are discussed in the light of previous observations, and comments are made on the temporal variability and wavelength dependence of the polarization. Dust scattering is identified as the dominant mechanism producing polarization in symbiotic stars. While it cannot be excluded that some symbiotic systems are completely engulfed in their dust shells, the data indicate that the H-alpha emission line may originate from outside of the dust-scattering envelopes in some systems.

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