BIG-BANG NUCLEOSYNTHESIS CONSTRAINTS AND LIGHT-ELEMENT ABUNDANCE ESTIMATES

被引：49

作者：

KRAUSS, LM ^{[1
]}

KERNAN, PJ ^{[1
]}

机构：

[1] CASE WESTERN RESERVE UNIV,DEPT ASTRON,CLEVELAND,OH 44106

来源：

PHYSICS LETTERS B | 1995年 / 347卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(95)00082-V

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

To elucidate the significance of the effect of systematic uncertainties in light element abundance estimates on cosmological bounds derivable from Big Bang Nucleosynthesis (BBN) we present tables giving bounds on Omega baryon and N-nu as one changes the limits on primordial He-4 and Li-7. This allows us to derive new relations between these estimates and constraints on Omega(baryon) and N-nu. For example, only if the helium mass fraction, Y(r)ho greater than or equal to .245 does Li-7 (or D) presently play a role in placing an upper limit on the baryon density, and only if Y(r)ho greater than or equal to .250 does He-4 cease to play a role in bounding eta(10). All the elements combine together tend to give a stringent upper bound of .16 on Omega(baryon). We also find that Y(r)ho must exceed .239 for consistency between theory and observation if D+He-3/H is less than 10(-4). Updated nuclear reaction rates, an updated neutron half life, Monte Carlo techniques, and correlations between the predicted abundances are incorporated in our analysis. We also discuss the handling of systematic uncertainties in the context of statistical analyses of BBN predictions.

引用

页码：347 / 353

页数：7

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