Internal motions in planetary nebulae - NGC 7354, I 289 and HU 1-2

Details Internal motions in planetary nebulae - NGC 7354, I 289 and HU 1-2 Internal motions in planetary nebulae - NGC 7354, I 289 and HU 1-2

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26as...51..119s&link_type=abstract

Astronomy and Astrophysics Supplement Series, vol. 51, Jan. 1983, p. 119-126. Research supported by the Consiglio Nazionale del

Astronomy and Astrophysics

Astrophysics

11

Atomic Spectra, Galactic Structure, H Lines, Oxygen Spectra, Planetary Nebulae, Radial Velocity, Astronomical Models, Ellipsoids, Forbidden Bands, Gas Expansion, High Dispersion Spectrographs, Interstellar Gas, Nitrogen, Prolate Spheroids, Toroidal Plasmas, Visible Spectrum

Scientific paper

The forbidden O III, H I and forbidden N II radial velocity fields within the planetary nebulae NGC 7354, I 289, and Hu 1-2 have been obtained from Echelle spectrograms. The observations indicate that NGC 7354 is a prolate spheroid or a three axes ellipsoid with a central, bright ring or torus of low eccentricity. I 289 consists of a prolate spheroid with major axis almost perpendicular to the line of sight. No conclusive spatial model can be obtained for Hu 1-2 in which the radiation is concentrated in two bright lobes.

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