AR III in planetary nebulae

Details AR III in planetary nebulae AR III in planetary nebulae

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...202..253k&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 202, no. 1-2, Aug. 1988, p. 253-255. SERC-supported research.

Astronomy and Astrophysics

Astrophysics

10

Argon, Electron Energy, Emission Spectra, Planetary Nebulae, Abundance, Hydrogen, Oxygen, Spectral Line Width

Scientific paper

Recent R-matrix calculations of electron impact excitation rates in Ar III are used to derive the theoretical temperature sensitive ratio R = I(3P1,2-1D2)/I(1D2-1S0) = I(7135 Å+7751 Å)/I(5192 Å). Electron temperatures estimated from the observed values of R in planetary nebulae are in good agreement with those deduced from O III. In addition, Ar III abundances determined from the 3P2-1D2 and 3P2-3P1 transitions at 7135 Å and 9 μm respectively are consistent, in contrast to results found using the excitation rates of Krueger and Czyzak.

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