Computation approach for CMB bispectrum from primordial magnetic fields
Computation approach for CMB bispectrum from primordial magnetic fields
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原初磁场 CMB 双谱的计算方法
DOI：
10.1103/physrevd.83.123523
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发表时间：
2011
影响因子：
5
通讯作者：
白石希典
中科院分区：
文献类型：
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作者：
K.Yamashita;D.S.Hirashima;白石希典;Toru Kawanishi;原田慎一;白石希典;河西 通;山下耕平;河西通;白石希典;Kohei Yamashita;河西通;原田慎一;白石希典;河西通;山下耕平;藤田和歌子;白石希典
我们提出了一个详细的计算，我们以前的短文件[M。Shiraishi，D. Nitta，S.横山角Ichiki和K.高桥<?format ?> 82.121302]，在该文献中，我们已经研究了通过由原始磁场诱导的矢量模式的漫画微波背景温度双谱对磁场强度的约束。通过考虑自旋球谐函数和Wigner符号的双谱的全角度依赖性，我们明确地证明了由椭圆各向同性原始矢量涨落引起的宇宙微波背景双谱也可以用旋转不变的方式描述为角度平均形式.我们还研究了原始磁场的功率谱具有不同谱指数的情况。
We present a detailed calculation of our previous short paper [M. Shiraishi, D. Nitta, S. Yokoyama, K. Ichiki, and K. Takahashi<?format ?>, Phys. Rev. D 82, 121302 (2010).PRVDAQ1550-799810.1103/PhysRevD.82.121302] in which we have investigated a constraint on the magnetic field strength through comic microwave background temperature bispectrum of vector modes induced from primordial magnetic fields. By taking into account full angular dependence of the bispectrum with spin spherical harmonics and Wigner symbols, we explicitly show that the cosmic microwave background bispectrum induced from the statistical-isotropic primordial vector fluctuations can be also described as an angle-averaged form in the rotationally invariant way. We also study the cases with different spectral indices of the power spectrum of the primordial magnetic fields.