A spectroscopic study of the high excitation nebula NGC 6302

Details A spectroscopic study of the high excitation nebula NGC 6302 A spectroscopic study of the high excitation nebula NGC 6302

Oct 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.197...95a&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 197, Oct. 1981, p. 95-106.

Astronomy and Astrophysics

Astronomy

66

Abundance, Chemical Composition, Iue, Nebulae, Spectroscopic Analysis, Interstellar Matter, Spectrum Analysis, Tables (Data), Telescopes

Scientific paper

The wonderfully intricate irregular gaseous nebula NGC 6302 shows a great range of excitation from the S I to Fe VII forbidden lines. Data obtained with the International Ultraviolet Explorer (IUE) covering the spectral range of wavelengths 1200-3203 and with the image-photon counting system at the Anglo-Australian telescope emphasizing the region of wavelengths 3200-4880 are used for a new determination of the chemical composition of this object. No simple theoretical model can represent the observed intensities. Helium and nitrogen are enhanced in abundance, as noted by previous observers, but the enrichment of nitrogen is a whole order of magnitude. Carbon and oxygen are decreased in abundance, neon and heavier elements show a 'normal' abundance pattern, but calcium and possibly silicon are depleted; presumably they are concentrated in grains.

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