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arXiv 1712.04583astro-ph.CO
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CMB频谱$μ$ -多重通货膨胀情景的失真

CMB Spectral $μ$-Distortion of Multiple Inflation Scenario

Gimin Bae, Sungjae Bae, Seungho Choe, Seo Hyun Lee, Jungwon Lim, Heeseung Zoe

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16 pages, 5 figures
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摘要：

在多重暴胀的情况下，有两个通货膨胀与中间物质占主导地位的阶段，功率谱估计将被增强的规模小于地平线的大小在开始的第二次通货膨胀，$k > k_{\rm b}$。我们要求$k_{\rm b} > 10 {\rm Mpc}^{-1}$确保增强的功率谱与宇宙微波背景辐射（CMB）的大尺度观测相一致。我们考虑由声波耗散产生的CMB谱失真来约束功率谱。$μ$失真值可以是对于$ k_{\rm b} \lesssim 10^3 {\rm Mpc}^{-1}$的标准$Λ$ CDM模型（$μ_{Λ\mathrm{CDM}} \simeq 2 \times 10^{-8}$）的期望值的$10$倍，而$y$失真几乎不受功率谱的增强的影响。

英文摘要：

In multiple inflation scenario having two inflations with an intermediate matter-dominated phase, the power spectrum is estimated to be enhanced on scales smaller than the horizon size at the beginning of the second inflation, $k > k_{\rm b}$. We require $k_{\rm b} > 10 {\rm Mpc}^{-1}$ to make sure that the enhanced power spectrum is consistent with large scale observation of cosmic microwave background (CMB). We consider the CMB spectral distortions generated by the dissipation of acoustic waves to constrain the power spectrum. The $μ$-distortion value can be $10$ times larger than the expectation of the standard $Λ$CDM model ($μ_{Λ\mathrm{CDM}} \simeq 2 \times 10^{-8}$) for $ k_{\rm b} \lesssim 10^3 {\rm Mpc}^{-1}$, while the $y$-distortion is hardly affected by the enhancement of the power spectrum.

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