Spectropolarimetry and the physical structure of proto-planetary nebulae

Details Spectropolarimetry and the physical structure of proto-planetary nebulae Spectropolarimetry and the physical structure of proto-planetary nebulae

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...246..444s&link_type=abstract

Astrophysical Journal, Part 1, vol. 246, June 1, 1981, p. 444-454. Research supported by the University of Minnesota

Astronomy and Astrophysics

Astrophysics

67

Emission Spectra, Line Spectra, Nebulae, Polarized Radiation, Protoplanets, Continuous Radiation, Cosmic Dust, Forbidden Bands, Linear Polarization, Polarimetry, Stellar Spectrophotometry

Scientific paper

Optical spectropolarimetry and spectrophotometry are presented of the two bipolar nebulae GL 618 and M2-9. A comparison of the polarization in the emission lines and the continuum is used to construct geometrical and physical models for each object. It is found that the forbidden lines arise largely in the visible nebulae, whereas the permitted lines are formed in a central high-density region and are scattered with the stellar continuum by dust grains in the lobes. Condensations are found to be an important component of the lobes, reinforcing the view that these bipolars represent a very early phase in the life of a planetary nebula.

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