Cosmic Background Anisotropy Induced by Isotropic Flat-Spectrum Gravitational-Wave Perturbations

Cosmic Background Anisotropy Induced by Isotropic Flat-Spectrum Gravitational-Wave Perturbations
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发表时间：
1985-05
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通讯作者：
A. A. Starobinskii-A.
A. A. Starobinskii-A.
中科院分区：
其他
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作者：
A. A. Starobinskii-A.

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计算的温度各向异性，将产生在宇宙微波背景的各向同性，随机合奏的原始引力波具有平坦的初始频谱。在角度尺度THETA > 2上，各向异性自相关函数实际上具有与先前针对平坦谱绝热扰动建立的情况相同的多极依赖性，而在尺度THETA < 1上，各向异性变得不显著。上限放置在引力波振幅和预期的四极各向异性。
A calculation is made of the temperature anisotropy that would be produced in the cosmic microwave background by an isotropic, stochastic ensemble of primordial gravitational waves having a flat initial spectrum. On angular scales THETA > 2 the anisotropy autocorrelation function has practically the same multipole dependence as previously established for the case of flat-spectrum adiabatic perturbations, while on scales THETA < 1 the anisotropy becomes insignificant. Upper limits are placed on the gravitational-wave amplitude and on the expected quadrupole anisotropy.