Photoionization models and chemical abundances of three halo planetary nebulae

Details Photoionization models and chemical abundances of three halo planetary nebulae Photoionization models and chemical abundances of three halo planetary nebulae

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980ap%26ss..71..393a&link_type=abstract

Astrophysics and Space Science, vol. 71, no. 2, Aug. 1980, p. 393-404. Research supported by the Conselho Nacional de Desenvolv

Mathematics

Logic

5

Abundance, Interstellar Gas, Photoionization, Planetary Nebulae, Astronomical Models, Carbon, Charge Transfer, Helium, Hydrogen

Scientific paper

Photoionization models have been constructed to explain the line emission of the three halo planetary nebulae: K 648, 49 plus 88.1 deg and 108 - 76.1 deg. The charge transfer reactions between neutral hydrogen and different ions were taken into account in ionization equations. Due to lack of observational information, radiation-bounded as well as matter-bounded models have been considered. Both these models indicate that He and C abundances are close to solar values whereas the heavier-elements are depleted.

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