Evidence for intrinsic polarization in the optical radiation of planetary nebulae

Details Evidence for intrinsic polarization in the optical radiation of planetary nebulae Evidence for intrinsic polarization in the optical radiation of planetary nebulae

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...160..171l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 160, no. 1, May 1986, p. 171-180.

Astronomy and Astrophysics

Astrophysics

5

Linear Polarization, Optical Polarization, Planetary Nebulae, Electron Scattering, Monochromatic Radiation, Oxygen, Polarimetry

Scientific paper

Linear polarization measurements have been obtained in several regions of the five planetary nebulae NGC 2392, NGC 3242, NGC 6720, NGC 7009, and NGC 6572. While the data obtained are in agreement with those of Hamilton and Liller (1973), the present measurements in various parts of the nebulae images reveal a nonuniform polarization pattern with curious features. Intrinsic polarization maps support the suspected trend of a tangential polarization pattern. Simple computations based on spherical nebulae models indicate that electron scattering must be ruled out as a cause because it only accounts for a small part of the observed polarization; it is suggested that the observed phenomena result from scattering by dust.

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