论文标题
用引力波探测各向异性宇宙
Probing the Anisotropic Universe with Gravitational Waves
论文作者
论文摘要
现代宇宙学基于这样的工作假设，即宇宙在大尺度上是各向同性和均匀的。在这里，我们记录了许多异常观察，指向与CMB偶极子一致的方向指向各向异性宇宙。如果物理，则应通过任何具有足够数据质量的宇宙学探测器来确认这一点。为此，我们执行了明亮和深色标准警笛的第一个半球形分解$ H_0 $确定，发现$ H_0 $后验的最大后验在CMB偶极子方向上更大，但包括明亮的Siren Siren Posterterior，这会导致此结论。可以预见的是，有限数量的GW观察结果与各向同性宇宙一致，但这可能会改变。必须重复这些测试，因为GW来源变得越来越多，局部化。
Modern cosmology rests on the working assumption that the Universe is isotropic and homogeneous at large scales. Here, we document a number of anomalous observations pointing to an anisotropic Universe in a direction consistent with the CMB dipole. If physical, this should be confirmed by any cosmological probe with sufficient data quality. To that end, we perform the first hemispherical decomposition of bright and dark standard siren $H_0$ determinations, finding that the maximum of the $H_0$ posterior is larger in the CMB dipole direction for dark sirens, but including the bright siren posterior reverses this conclusion. As may be expected, the limited number of GW observations is consistent with an isotropic Universe, but this can change going forward. It is imperative to repeat these tests as GW sources become more numerous and better localised.
