| dbo:abstract |
In astronomy, the lithium problem or lithium discrepancy refers to the discrepancy between the primordial abundance of lithium as inferred from observations of metal-poor (Population II) halo stars in our galaxy and the amount that should theoretically exist due to Big Bang nucleosynthesis+WMAP cosmic baryon density predictions of the CMB. Namely, the most widely accepted models of the Big Bang suggest that three times as much primordial lithium, in particular lithium-7, should exist. This contrasts with the observed abundance of isotopes of hydrogen (1H and 2H) and helium (3He and 4He) that are consistent with predictions. The discrepancy is highlighted in a so-called "Schramm plot", named in honor of astrophysicist David Schramm, which depicts these primordial abundances as a function of cosmic baryon content from standard BBN predictions. (en) Le problème du lithium cosmologique fait référence à une différence significative entre les calculs théoriques de l’abondance de lithium 7 créé lors de la nucléosynthèse primordiale et les observations. (fr) 在天文学中，锂问题或锂差异是指太初核合成+威尔金森微波各向异性探测器（BBN+WMAP）所预言的原初的丰度与天文观测到的数值之间所存在的差异。这是目前核天体领域的一个疑难问题。 (zh) |
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Le problème du lithium cosmologique fait référence à une différence significative entre les calculs théoriques de l’abondance de lithium 7 créé lors de la nucléosynthèse primordiale et les observations. (fr) 在天文学中，锂问题或锂差异是指太初核合成+威尔金森微波各向异性探测器（BBN+WMAP）所预言的原初的丰度与天文观测到的数值之间所存在的差异。这是目前核天体领域的一个疑难问题。 (zh) In astronomy, the lithium problem or lithium discrepancy refers to the discrepancy between the primordial abundance of lithium as inferred from observations of metal-poor (Population II) halo stars in our galaxy and the amount that should theoretically exist due to Big Bang nucleosynthesis+WMAP cosmic baryon density predictions of the CMB. Namely, the most widely accepted models of the Big Bang suggest that three times as much primordial lithium, in particular lithium-7, should exist. This contrasts with the observed abundance of isotopes of hydrogen (1H and 2H) and helium (3He and 4He) that are consistent with predictions. The discrepancy is highlighted in a so-called "Schramm plot", named in honor of astrophysicist David Schramm, which depicts these primordial abundances as a function of (en) |
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Cosmological lithium problem (en) Problème du lithium cosmologique (fr) 宇宙锂问题 (zh) |
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dbr:Lithium_burning |
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