CCD observations of the bipolar nebula M2-9

Details CCD observations of the bipolar nebula M2-9 CCD observations of the bipolar nebula M2-9

May 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...134..333a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 134, no. 2, May 1984, p. 333-337.

Astronomy and Astrophysics

Astrophysics

21

Charge Coupled Devices, Nebulae, Polarimetry, Stellar Evolution, Astronomical Maps, Gray Scale, Image Analysis, Linear Polarization

Scientific paper

Recent (1982) images and linear polarization maps are presented of the peculiar and variable bipolar nebula M2-9. The new data were obtained with the Royal Observatory, Edinburgh CCD Imaging Spectropolarimeter in three passbands, namely B(4600 A), R(7500 A), and I(8500 A). Small changes in the nebular structure have occurred since 1979. The wavelength dependence of polarization implies scattering by small grains (less than 0.1 microns), and modelling of the ellipticity of the polarization vector pattern indicates that the illuminating source is a large, optically thick disk or torus (i.e., not point-like).

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