Global texture and the microwave background.
Global texture and the microwave background.
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DOI：
10.1103/physrevlett.64.2736
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发表时间：
1990-06
影响因子：
8.6
通讯作者：
Neil Turok;D. Spergel
中科院分区：
文献类型：
--
作者：
Neil Turok;D. Spergel
计算了平坦背景中全局纹理的折叠“结”所产生的度规扰动。这被用来计算穿过这种结的光子的能量移动，导致对大规模结构形成的全局织构场景中产生的微波各向异性图案的预测。该度规也被用来计算非相对论物质中诱导的速度场，在视界内的尺度上。这将产生早期一代的受引力约束的小型天体。在更大的尺度上，织构场将在与星系调查中看到的相当的尺度上产生相干速度场。
The metric perturbation produced by a collapsing ``knot'' of global texture in a flat background is calculated. This is used to calculate the energy shift for photons traversing such knots, leading to a prediction for the microwave anisotropy pattern produced in the global-texture scenario for large-scale structure formation. The metric is also used to calculate the velocity field induced in nonrelativistic matter, on scales well inside the horizon. This would produce an early generation of small gravitationally bound objects. At larger scales, the texture field would induce coherent velocity fields on a scale comparable to that seen in galaxy surveys.