Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977afz....13..569g&link_type=abstract
Astrofizika, vol. 13, Nov. 1977, p. 569-586. In Russian.
Astronomy and Astrophysics
Astronomy
5
Astronomical Photometry, Nebulae, Polarization Characteristics, Stellar Spectra, Astronomical Models, Balmer Series, Continuous Spectra, Cosmic Dust, Emission Spectra, Infrared Radiation, Ionized Gases, Scorpius Constellation
Scientific paper
Results are presented for polarimetric observations of six regions in the Omega nebula (NGC 6618) and of 26 neighboring stars. The nebula was observed through five filters, three of which were centered on emission lines, but most of the stars were observed without filters. A polarization wavelength dependence not different from that for interstellar polarization is determined for two stars, and the degree of polarization for all six regions in the nebula is found to be higher in the continuum than in the emission lines, indicating intrinsic polarization in the nebular emission. Interstellar-polarization parameters are computed from the stellar observations for the western parts of the nebula and are shown to be consistent with those observed for the emission lines. It is concluded that the intrinsic continuum polarization is due to scattering by dust of radiation from stars located in the region of a dark dust lane.
Gagen-Torn V. A.
Voshchinnikov Nikolai V.
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