Morphology of bipolar planetary nebulae. II - The three-dimensional structures

Details Morphology of bipolar planetary nebulae. II - The three-dimensional structures Morphology of bipolar planetary nebulae. II - The three-dimensional structures

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...232..184p&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 232, no. 1, June 1990, p. 184-194.

Astronomy and Astrophysics

Astrophysics

18

Astronomical Models, Morphology, Planetary Nebulae, Three Dimensional Models, Bipolarity, Charge Coupled Devices, Isophotes, Radial Distribution

Scientific paper

Isophotal maps of bipolar planetary nebulae (BPN) are used here to study the BPN morphology and to produce maps of their normalized density distribution. Shell models are calculated, and the theoretical isophotes are compared with CCD contours. It is shown that a simple large-scale smooth structure can be derived and that a unique prolate model with two or three adjustable parameters seems suitable for most BPN. The BPN NGC6720, NGC7293, and He2-66 are shown to be morphologically identical.

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