Power spectrum constraints from spectral distortions in the cosmic microwave background
Power spectrum constraints from spectral distortions in the cosmic microwave background
复制标题
宇宙微波背景中光谱畸变的功率谱约束
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
J. Silk
中科院分区：
文献类型：
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作者：
Wayne Hu;D. Scott;J. Silk
利用最近的实验限制化学势扭曲从宇宙背景探测器（COBE）远红外天文卫星（FIRAS），和大的阻尼臂跨越亚金斯尺度波动的COBE DMR波动，我们设置了一个约束的斜率的原始功率谱n。正确地考虑到涨落增长和阻尼以及热化过程，可以分析计算整个标度和红移范围内的贡献。保守地假设μ小于1.76 × 10（exp-4），我们发现n的95%上限仅弱依赖于其他宇宙学参数，例如，对于Omega（sub 0）= 1，n小于1.60（h=0.5），n小于1.63（h=1.0），在具有宇宙学常数的平坦模型中，Omega（sub 0）小于1的约束稍微弱一些。
Using recent experimental limits on chemical potential distortions from Cosmic Background Explorer (COBE) Far Infrared Astronomy Satellite (FIRAS), and the large lever-arm spanning the damping of sub-Jeans scale fluctuations to the COBE DMR fluctuations, we set a constraint on the slope of the primordial power spectrum n. It is possible to analytically calculate the contribution over the full range of scales and redshifts, correctly taking into account fluctuation growth and damping as well as thermalization processes. Assuming conservatively that mu is less than 1.76 x 10(exp -4), we find that the 95% upper limit on n is only weakly dependent on other cosmological parameters, e.g., n is less than 1.60 (h=0.5) and n is less than 1.63 (h=1.0) for Omega(sub 0) = 1, with marginally weaker constraints for Omega(sub 0) is less than 1 in a flat model with a cosmological constant.