Polarization of starlight in W3

Details Polarization of starlight in W3 Polarization of starlight in W3

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a...100..249l&link_type=abstract

Astronomy and Astrophysics, vol. 100, no. 2, July 1981, p. 249-253.

Astronomy and Astrophysics

Astrophysics

6

Cosmic Dust, Early Stars, Hydrogen Clouds, Linear Polarization, Stellar Evolution, Stellar Radiation, Hydrogen Ions, Interstellar Extinction, Wavelengths

Scientific paper

Linear polarization measurements of a number of heavily reddened early type stars in the W 3 region and its environs are presented. The wavelength dependence of the degree of polarization is found to agree in all cases with that of the general interstellar field, as established by Serkowski et al. (1975) and extended by Wilking et al. (1980). The wavelengths of maximum polarization - between 500 nm and 675 nm - are found to be correlated with the corresponding visual extinctions. The ratios of polarization to extinction obtained in W 3 are as high as 3% per mag, implying a very efficient polarization mechanism. The similar wavelength dependence of the polarization and the parallel alignment of the polarization vectors suggest that this mechanism is the same as in the general interstellar field.

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