论文标题
电离背景波动对高红移LY $α$发射星系的空间相关性的影响
The effect of ionizing background fluctuations on the spatial correlations of high redshift Ly$α$-emitting galaxies
论文作者
论文摘要
我们研究了通过调节系统周围气体的电离水平的调节，调查了元层次光电离超紫罗兰背景（UVBG）对LY $α$发射星系聚类的可能影响。在红移$ z> 5 $下，即使假设循环介质的电源已经完成，波动也足够大，以至于它们可能无法毫无疑问地增强，甚至可能占主导地位，刻度上的角度相关功能在刻度上最高可达几百个arcsecs。尽管与$ z \ sim 5.7 $的观察结果进行了比较，在统计上是一致的，没有UVBG波动的影响，因此波动允许可接受的模型的范围，以包括那些具有相对较低$ ly $ ly $α$α$ a $ em-α$ em-α$ em-α$的星系的模型。在这种情况下，在大约红移范围内，ly $α$ emitter的偏见因素的演变$ 3 <z <7 $对应于$ \ sim 10^{10.5} \ sim $α$ emitting的星系的近乎恒定的光晕质量。
We investigate the possible influence of fluctuations in the metagalactic photoionizing ultra-violet background (UVBG) on the clustering of Ly$α$-emitting galaxies through the modulation of the ionization level of the gas surrounding the systems. At redshifts $z > 5$, even when assuming the reionization of the intergalactic medium has completed, the fluctuations are sufficiently large that they may non-negligibly enhance, and possibly even dominate, the angular correlation function on scales up to a few hundred arcsecs. Whilst a comparison with observations at $z \sim 5.7$ is statistically consistent with no influence of UVBG fluctuations, allowing for the fluctuations opens up the range of acceptable models to include those with relatively low bias factors for the Ly$α$-emitting galaxies. In this case, the evolution in the bias factor of Ly$α$-emitters over the approximate redshift range $3 < z < 7$ corresponds to a nearly constant halo mass for Ly$α$-emitting galaxies of $\sim 10^{10.5}\,M_\odot$.
