Measurement of S II forbidden lines in three southern planetary nebulae

Details Measurement of S II forbidden lines in three southern planetary nebulae Measurement of S II forbidden lines in three southern planetary nebulae

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ap%26ss.168..225m&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 168, no. 2, June 1990, p. 225-232. In French.

Astronomy and Astrophysics

Astrophysics

Forbidden Transitions, Planetary Nebulae, Sulfur, Astronomical Spectroscopy, Electron Density (Concentration)

Scientific paper

Three southern planetary nebulae (NGC 2818, He 2-130, and NGC 3132) have been observed with the IDS (Image Dessector Scanner) combined with the Boller and Chivens spectrograph mounted at the Cassegrain focus of the 1.52 m telescope of the ESO in Chile. The spectrograph dispersion was 60 A/mm in the spectral range 6170-7298 A. Spectra were obtained from an array of positions across each nebula along the E-W direction and/or N-S direction. In order to derive electron density, only the S II forbidden lines (6617 A-6731 A) are given here. The results are in agreement with a shell structure for the observed nebulae.

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