Polarization observations of the nebula M 20 with filters

Details Polarization observations of the nebula M 20 with filters Polarization observations of the nebula M 20 with filters

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983afz....19..127v&link_type=abstract

(Astrofizika, vol. 19, Jan.-Mar. 1983, p. 127-134) Astrophysics (ISSN 0571-7132), vol. 19, no. 1, July 1983, p. 75-79. Translati

Astronomy and Astrophysics

Astrophysics

1

Cosmic Dust, Nebulae, Optical Polarization, Stellar Radiation, Continuous Spectra, Emission Spectra, Optical Filters

Scientific paper

Results are presented of polarization observations using six filters of five regions of the nebula M 20 and the star HD 164514 which is located behind the nebula. It is found that the degree of polarization in the continuum is higher than in the emission lines for three regions in the southern part of the nebula. The polarization is determined to arise due to the scattering of the radiation of the exciting star HD 164492 by dust particles (probably consisting mostly of dirty ice) in M 20. In the northern part of the nebula, it is shown that the nonspherical grains are probably oriented in such a way that their major axes are in a plane approximately perpendicular to the direction to the star HD 164492.

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