arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0910.1083astro-ph.CO
收藏

WMAP对$α$和$m_e$时间变化的5年限制

WMAP 5-year constraints on time variation of $α$ and $m_e$

Claudia G. Scóccola, Susana J. Landau, Hector Vucetich

摘要:

我们研究了基本常数在更新的复合方案中的作用,重点研究了早期宇宙中精细结构常数α和电子质量m_e的时间变化。使用CMB数据,包括WMAP 5年的释放,和2dFGRS功率谱,我们把这些常数的变化的界限,当这两个常数被允许改变,在这种情况下,只有其中之一是可变的。特别地,我们发现-0.019 < Δα/ α_0 < 0.017(95% c.l.),我们对α和宇宙学参数的联合估计。最后,我们分析了约束条件如何取决于重组的情况。

英文摘要:

We studied the role of fundamental constants in an updated recombination scenario, focusing on the time variation of the fine structure constant αand the electron mass m_e in the early Universe. Using CMB data including WMAP 5-yr release, and the 2dFGRS power spectrum, we put bounds on variations of these constants, when both constants are allowed to vary, and in the case that only one of them is variable. In particular, we have found that -0.019 < Δα/ α_0 < 0.017 (95% c.l.), in our joint estimation of αand cosmological parameters. Finally, we analyze how the constraints depends on the recombination scenario.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑