New Results on the Determination of the Pregalactic Helium Abundance

Details New Results on the Determination of the Pregalactic Helium Abundance New Results on the Determination of the Pregalactic Helium Abundance

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990rmxaa..21..197m&link_type=abstract

Revista Mexicana de Astronomia y Astrofisica, 21, 197

Astronomy and Astrophysics

Astronomy

3

Scientific paper

ABSTRACT: A sample containing 58 objects comprising blue compact galaxies, galactic H II regions, and planetary nebulae is considered in order to determine the pregalactic helium abundance Yp and the enrichment ratio of helium relative to heavy elements Ay/Az. RESUMO: Neste trabalho, e considerada uma amostra contendo 58 objetos, incluindo galaxias compactas azuis, regioes H II galaticas e nebulosas planetarias, com o objetivo de determinar a pregalatica de helio Yp e a razao de enriquecimento entre helio e elementos pesados, AY/Az. Key words: INTERSTELLAR-ABUNDANCES

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