The expansion velocity field within the planetary nebula NGC 7008

Details The expansion velocity field within the planetary nebula NGC 7008 The expansion velocity field within the planetary nebula NGC 7008

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26as...52..399s&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 52, June 1983, p. 399-402. Research supported by the Consigl

Astronomy and Astrophysics

Astrophysics

4

Emission Spectra, Forbidden Bands, Gas Expansion, H Alpha Line, Planetary Nebulae, Radial Velocity, Astronomical Models, High Dispersion Spectrographs, Nitrogen, Oxygen Spectra

Scientific paper

The forbidden O III, H-alpha, and forbidden N II expansion velocity fields within the planetary nebula NGC 7008 have been obtained from high dispersion spectrograms. The photographic and spectroscopic data indicate that this nebula is very inhomogeneous. A rough model consists of two coaxial prolate spheroids of moderate ellipticity. Evidence is presented that K 4-44 (93 + 5 deg 1), classified as a distinct planetary nebula in the Catalogue of Galactic Planetary Nebulae of Perek and Kohoutek (1967) is a condensation within NGC 7008.

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