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Cited by 244

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Revised Primordial Helium Abundance Based on New Atomic Data

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Peimbert, Manuel, Luridiana, Valentina, Peimbert, Antonio·2007·The Astrophysical Journal

Abstract

We have derived a primordial helium abundance of Y p = 0.2477 ± 0.0029, based on new atomic physics computations of the recombination coefficients of He I and of the collisional excitation of the H I Balmer lines together with observations and photoionization models of metal-poor extragalactic H II regions. The new atomic data increase our previous determination of Y p by 0.0086, a very significant amount. By combining our Y p result with the predictions made by the standard big bang nucleosynthesis model, we find a baryon-to-photon ratio, η, in excellent agreement both with the η-value derived by the primordial deuterium abundance value observed in damped Lyα systems and with the one obtained from the WMAP observations.

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Metadata

Authors
Peimbert, M., Luridiana, V., & Peimbert, A.
Venue
The Astrophysical Journal
Published
2007-09-10
Volume
666
Issue
2
Pages
636-646
ISSN
  • 0004-637X (ISSN-L)
  • 1538-4357
OpenAlex
W2079337104
Cited by
244
References
1
FWCI
12.68
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Revised Primordial Helium Abundance Based on New Atomic Data. https://app.cochat.ai/papers/10.1086/520571
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Peimbert, M., Luridiana, V., & Peimbert, A. (2007). Revised Primordial Helium Abundance Based on New Atomic Data. The Astrophysical Journal. https://doi.org/10.1086/520571

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