Odd-parity cosmic microwave background bispectrum
Odd-parity cosmic microwave background bispectrum
复制标题
奇宇称宇宙微波背景双谱
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
T. Souradeep
中科院分区：
文献类型：
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作者：
M. Kamionkowski;T. Souradeep
测量微波背景的双谱，或三点相关函数，现已成为微波背景研究的热点之一
Measurement of the CMB bispectrum, or three-point correlation function, has now become one of the
principle efforts in early-Universe cosmology. Here we show that there is an odd-parity component of the
CMB bispectrum that has been hitherto unexplored. We argue that odd-parity temperature-polarization
bispectra can arise, in principle, through weak lensing of the CMB by chiral gravitational waves or
through cosmological birefringence, although the signals will be small even in the best-case scenarios.
Measurement of these bispectra requires only modest modifications to the usual data-analysis algorithms.
They may be useful as a consistency test in searches for the usual bispectrum and to search for surprises in
the data.