Morphological study of three Abell's planetary nebulae - A33, A36, and A79

Details Morphological study of three Abell's planetary nebulae - A33, A36, and A79 Morphological study of three Abell's planetary nebulae - A33, A36, and A79

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...117..272h&link_type=abstract

Astronomy and Astrophysics, vol. 117, no. 2, Jan. 1983, p. 272-276.

Astronomy and Astrophysics

Astronomy

11

Astronomical Spectroscopy, Monochromatic Radiation, Morphology, Planetary Nebulae, Radiant Flux Density, Spectrum Analysis, Astronomical Photography, Forbidden Bands, H Alpha Line, H Beta Line, Nitrogen, Planetary Evolution, Sky Surveys (Astronomy), Spectral Energy Distribution, Sulfur

Scientific paper

The Abell list discovered in the Palomar Sky Survey includes the three objects A33, A36 and A79, which have been classified as old planetary nebulae. The monochromatic images of these three objects in H-alpha, H-beta, and the forbidden lines N II 6584 A and S II 6717 A, are presented and discussed. The forbidden line N II/H-alpha intensity ratio is found to be useful because of its implications in the evolutionary behavior of planetary nebulae.

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