论文标题
Lyman-Alpha森林断层扫描和与宇宙空隙的互相关
Lyman-alpha forest tomography and cross-correlation with cosmic voids
论文作者
论文摘要
Lyman-Alpha森林是高红移（Z> 2）的大规模物质密度波动的独特探针。可以使用层析成像重建方法从Lyman-Alpha数据中获得物质分布的3D地图。在这里，我们介绍了z> 2处最大的物质波动层片图，这是由SDSS-Alpha Forest覆盖的GPC^3体积，来自SDSS-Alpha森林中的SDSS-Alpha Forest，在Stripe 82磁场中。我们提出了由此地图构建的高红移空隙的目录。在如此高的红移时，这些空隙与莱曼 - 阿尔法森林之间的互相关的测量可通过RSD效应对物质速度流进行首次观察。数据与模拟非常吻合，并通过线性的Kaiser速度模型进行了良好的调整。
The Lyman-alpha forest is a unique probe of large-scale matter density fluctuations at high redshift (z > 2). It is possible to obtain 3D maps of the matter distribution from Lyman-alpha data, using tomographic reconstruction methods. Here, we present the largest tomographic map of matter fluctuations at z > 2, over the Gpc^3 volume covered by Lyman-alpha forest from SDSS-IV quasar spectra in the Stripe 82 field. We present a catalog of high-redshift voids constructed from this map. The measurement of the cross-correlation between these voids and the Lyman-alpha forest provides the first observation of the matter velocity flow around voids, through the RSD effect, at such high redshift. The data is in good agreement with simulations and is well adjusted with a linear, Kaiser velocity model.
