On the effect of recent atomic parameter values in the Blue Compact Galaxies abundance

Details On the effect of recent atomic parameter values in the Blue Compact Galaxies abundance On the effect of recent atomic parameter values in the Blue Compact Galaxies abundance

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26as...62..173z&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 62, Oct. 1985, p. 173-178.

Astronomy and Astrophysics

Astrophysics

13

Abundance, Compact Galaxies, Electron Density (Concentration), Electron Energy, Forbidden Transitions, Galaxies, H Ii Regions, Helium, Nebulae, Transition Probabilities

Scientific paper

The authors discuss the incidence of the most recent atomic parameter values in the theoretical line intensity ratios often used to derive electron temperatures and densities in H II regions, from optical spectra. The results when applied to the previously published observations of blue compact galaxies (BCG) lead to lower densities and higher temperatures. The authors also derive the ionic abundances for the same BCG sample, finding differences with the published ones, that show a general trend. Finally, the effects of these results on the pregalactic helium abundance determination appear to be unimportant.

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