Primordial black holes, eternal inflation, and the inflationary parameter space after WMAP5
Primordial black holes, eternal inflation, and the inflationary parameter space after WMAP5
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DOI：
10.1088/1475-7516/2008/07/024
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发表时间：
2008-05
影响因子：
6.4
通讯作者：
H. Peiris;R. Easther
中科院分区：
文献类型：
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作者：
H. Peiris;R. Easther
我们考虑了WMAP5 （WMAP：威尔金森微波各向异性探测器）数据集、ACBAR（弧形宇宙学辐射热计阵列接收器）和超新星遗产调查中单个最小耦合标量场驱动的暴胀约束。我们使用慢滚重构算法来推导膨胀参数空间上的最优约束。WMAP5允许的标量谱斜率的尺度依赖性足够大，可以产生可行的模型，其中当外推到暴胀结束时，小尺度扰动具有相当大的振幅。我们发现，排除可能导致原始黑洞过度产生甚至永恒暴胀开始的参数值会导致对慢滚参数的潜在重大约束。最后，我们提出了一种更复杂的方法来包含基于通货膨胀总持续时间的先验，并讨论了由此产生的对通货膨胀参数空间的限制。
We consider constraints on inflation driven by a single, minimally coupled scalar field in the light of the WMAP5 (WMAP: Wilkinson Microwave Anisotropy Probe) data set, as well as ACBAR (Arcminute Cosmology Bolometer Array Receiver) and the SuperNova Legacy Survey. We use the slow roll reconstruction algorithm to derive optimal constraints on the inflationary parameter space. The scale dependence in the slope of the scalar spectrum permitted by WMAP5 is large enough to lead to viable models where the small scale perturbations have a substantial amplitude when extrapolated to the end of inflation. We find that excluding parameter values which would cause the overproduction of primordial black holes or even the onset of eternal inflation leads to potentially significant constraints on the slow roll parameters. Finally, we present a more sophisticated approach to including priors based on the total duration of inflation, and discuss the resulting restrictions on the inflationary parameter space.