Utraviolet observations of the planetary nebula NGC 2242

Details Utraviolet observations of the planetary nebula NGC 2242 Utraviolet observations of the planetary nebula NGC 2242

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989pasp..101..541g&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 101, May 1989, p. 541-546. Research supported by the Ro

Astronomy and Astrophysics

Astronomy

5

Abundance, Planetary Nebulae, Ultraviolet Spectra, Argon, Carbon, Emission Spectra, Helium Ions, Hydrogen Ions, Narrowband, Neon, Oxygen Ions, Reflectors

Scientific paper

IUE observations of NGC 2242 reveal strong emission lines of C IV, He II, semi-forbidden C III, and forbidden Ne IV, along with weaker emissions from O IV and N IV. It is found that the oxygen abundance is about 1/6 of the solar value for T(e) = 25,000 K, and that the N/H and Ar/H ratios are down by a factor of 2-3 from typical disk PN values. The present abundance pattern resembles that observed in the halo planetary DDDM-1, except for the unusually low C/O ratio in DDDM-1.

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