标题： 微波背景辐射中的非均匀性在拟稳态宇宙学框架下的解释 显示英文标题

标题： Inhomogeneities in the Microwave Background Radiation interpreted within the framework of the Quasi-Steady State Cosmology

摘要： 我们计算了由拟稳态宇宙学（QSSC）产生的微波背景辐射（MBR）温度涨落的预期角功率谱。 本文首先简要描述了在QSSC中背景是如何产生和热化的。 然后，我们在一个简单模型的框架内讨论了由于天体物理和宇宙学原因可能引起背景涨落的可能来源。 结果显示，在这个宇宙学中，功率谱峰值分别出现在$l \approx 6-10$、180-220和600-900处，分别与标度因子最后一个最小值处的曲率效应、星系团和星系群有关。 星系团的影响被显示与它们在空间中的分布相关，这可以通过QSSC中结构形成的玩具模型来表示。 我们使用与三个特征尺度上的温度涨落源相关的六个参数推导并参数化了角功率谱。 我们能够很好地拟合MBR温度涨落谱的观测带功率估计值。 此外，"最佳拟合"参数的值与预期值范围一致。 显示英文摘要

摘要： We calculate the expected angular power spectrum of the temperature fluctuations in the microwave background radiation (MBR) generated in the quasi-steady state cosmology (QSSC). The paper begins with a brief description of how the background is produced and thermalized in the QSSC. We then discuss within the framework of a simple model, the likely sources of fluctuations in the background due to astrophysical and cosmological causes. Power spectrum peaks at $l \approx 6-10$, 180-220 and 600-900 are shown to be related in this cosmology respectively to curvature effects at the last minimum of the scale factor, clusters and groups of galaxies. The effect of clusters is shown to be related to their distribution in space as indicated by a toy model of structure formation in the QSSC. We derive and parameterize the angular power spectrum using six parameters related to the sources of temperature fluctuations at three characteristic scales. We are able to obtain a satisfactory fit to the observational band power estimates of MBR temperature fluctuation spectrum. Moreover, the values of `best fit' parameters are consistent with the range of expected values.