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arXiv 1402.0968astro-ph.COgr-qc
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未来CMB实验中温度和光谱畸变的参数化

Parameterization of temperature and spectral distortions in future CMB experiments

Cyril Pitrou, Albert Stebbins

摘要:

宇宙微波背景辐射的光谱畸变是由康普顿与电子的碰撞引起的。我们回顾了各种计划来表征各向异性CMB与非普朗克谱。我们主张使用几何平均的温度矩作为首选的语言来描述这些光谱失真,无论是理论建模和观测。数值模拟更简单,矩是框架无关的,在散射方面的模式截断是准确的。

英文摘要:

CMB spectral distortions are induced by Compton collisions with electrons. We review the various schemes to characterize the anisotropic CMB with a non-Planckian spectrum. We advocate using logarithmically averaged temperature moments as the preferred language to describe these spectral distortions, both for theoretical modeling and observations. Numerical modeling is simpler, the moments are frame-independent, and in terms of scattering the mode truncation is exact.

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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