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arXiv 1106.0106astro-ph.COgr-qchep-ph
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用CMB超越标准宇宙学模型

Beyond the Standard cosmological model with CMB

Tarun Souradeep

摘要:

CMB各向异性的测量以及最近的偏振测量在宇宙学中起着非常重要的作用。除了精确确定“标准”宇宙学模型的各种参数外,观测还确立了构成宇宙学模型和宇宙结构形成基础的一些重要基本原则-在一个平坦的、统计各向同性的宇宙中存在“因果”相关的、绝热的、原始的扰动。这与暴胀范式的期望和早期宇宙暴胀最简单实现的一般预测是一致的。此外,重力不稳定性是这些初始扰动形成结构的既定机制。原始微扰观测到的CMB各向异性和极化是最令人信服的证据,新的,可能是基本的,在早期宇宙的物理。目前,科学界正在超越“标准”模型的参数估计,寻找早期宇宙物理学的微妙特征。

英文摘要:

Measurements of CMB anisotropy and, more recently, polarization have played a very important role in cosmology. Besides precise determination of various parameters of the `standard' cosmological model, observations have also established some important basic tenets that underlie models of cosmology and structure formation in the universe -- `acausally' correlated, adiabatic, primordial perturbations in a flat, statistically isotropic universe. These are consistent with the expectation of the paradigm of inflation and the generic prediction of the simplest realization of inflationary scenario in the early universe. Further, gravitational instability is the established mechanism for structure formation from these initial perturbations. Primordial perturbations observed as the CMB anisotropy and polarization is the most compelling evidence for new, possibly fundamental, physics in the early universe. The community is now looking beyond the parameter estimation of the `standard' model, for subtle, characteristic signatures of early universe physics.

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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