Measurements of 4He in metal-poor extragalactic H ii regions: the primordial Helium abundance and the ΔY/ΔO ratio

Bibcode
2010IAUS..268...91P
DOI
10.1017/S1743921310003911
Peimbert, Manuel; Peimbert, A.; Carigi, L.; Luridiana, V.
Bibliographical reference

Light Elements in the Universe, Proceedings of the International Astronomical Union, IAU Symposium, Volume 268, p. 91-100

Advertised on:
4
2010
Number of authors
4
IAC number of authors
1
Citations
11
Refereed citations
9
Description
We present a review on the determination of the primordial helium abundance Yp, based on the study of hydrogen and helium recombination lines in extragalactic H ii regions. We also discuss the observational determinations of the increase of helium to the increase of oxygen by mass ΔY/ΔO, and compare them with predictions based on models of galactic chemical evolution.
Type
Non-refereed

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