Miller C J, Nichol R C, Batuski D J
Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213, USA.
Science. 2001 Jun 22;292(5525):2302-3. doi: 10.1126/science.1060440. Epub 2001 May 24.
During its first approximately 100,000 years, the universe was a fully ionized plasma with a tight coupling by Thompson scattering between the photons and matter. The trade-off between gravitational collapse and photon pressure causes acoustic oscillations in this primordial fluid. These oscillations will leave predictable imprints in the spectra of the cosmic microwave background and the present-day matter-density distribution. Recently, the BOOMERANG and MAXIMA teams announced the detection of these acoustic oscillations in the cosmic microwave background (observed at redshift approximately 1000). Here, we compare these CMB detections with the corresponding acoustic oscillations in the matter-density power spectrum (observed at redshift approximately 0.1). These consistent results, from two different cosmological epochs, provide further support for our standard Hot Big Bang model of the universe.
在其最初大约10万年的时间里，宇宙是一个完全电离的等离子体，光子与物质通过汤普森散射紧密耦合。引力坍缩与光子压力之间的权衡导致了这种原始流体中的声学振荡。这些振荡将在宇宙微波背景光谱和当今物质密度分布中留下可预测的印记。最近，BOOMERANG和MAXIMA团队宣布在宇宙微波背景中探测到了这些声学振荡（在红移约1000处观测到）。在这里，我们将这些宇宙微波背景探测结果与物质密度功率谱中的相应声学振荡（在红移约0.1处观测到）进行比较。来自两个不同宇宙学时期的这些一致结果，为我们的宇宙标准热大爆炸模型提供了进一步的支持。
