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arXiv 0708.0429astro-phgr-qchep-ph
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通过大尺度结构观测大爆炸温度

Observing the temperature of the Big Bang through large scale structure

Pedro Ferreira, Joao Magueijo

摘要:

人们普遍认为,宇宙在非常早期的时候经历了一段热平衡时期。人们期望这种原始状态的残余会印刻在时空的大尺度结构上。在本文中,我们研究的形态,这种热残留物在宇宙的早期动力学是由一个标量场。我们计算了大尺度上的波动幅度,并将其与真空波动的印记进行了比较。然后,我们使用观测到的宇宙微波背景波动的功率谱来限制宇宙在暴胀之前和暴胀期间的温度。我们还提出了一种替代方案,其中的波动主要是热和近尺度不变。

英文摘要:

It is widely accepted that the Universe underwent a period of thermal equilibrium at very early times. One expects a residue of this primordial state to be imprinted on the large scale structure of space time. In this paper we study the morphology of this thermal residue in a universe whose early dynamics is governed by a scalar field. We calculate the amplitude of fluctuations on large scales and compare it to the imprint of vacuum fluctuations. We then use the observed power spectrum of fluctuations on the cosmic microwave background to place a constraint on the temperature of the Universe before and during inflation. We also present an alternative scenario where the fluctuations are predominantly thermal and near scale-invariant.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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