Redetermination of the helium abundances in HII regions in Blue Compact Dwarf Galaxies |
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| Authors: | V V Holovatyi B Ya Melekh |
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| Institution: | (1) Ivan Franko L’vov National University, ul. Kyryla i Mefodiya 8, L’vov, 79005, Ukraine |
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| Abstract: | The He/H abundances in HII regions in Blue Compact Dwarf Galaxies are redetermined using the new recombination coefficients of Benjamin et al. The electron number density n e in the He+ region, optical depth τ3889 in the HeI λ3889 Å line, and coefficient of underlying stellar absorption aHeI are determined using the self-consistent method of Olive and Skillman. The primordial helium abundance and its enrichment are found using the helium abundances obtained in this paper and heavy-element abundances from our recent paper I: Y p = 0.244 ± 0.004 and dY/dZ = 8.8 ± 4.6. |
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