论文标题
线强度图作为电源探测的线强度图的反对称互相关
Antisymmetric cross-correlation of line-intensity maps as a probe of reionization
论文作者
论文摘要
我们为线强度图之间的互相关信号提供了一个新的估计器，以探测电离时代。提出的估计量是迄今忽略的互相关的反对称分量，在视线位置的交换下。我们考虑了HI和CO波动之间的互相关，并预测当解释反对称贡献时，回避参数的精度提高了。为了打破强度映射功率谱的天体物理学与宇宙学之间的堕落方式，我们研究了反对称和对称成分之间的比率。尽管我们的结果取决于高度不确定的天体建模，但我们表明，在大多数标准方案中，包括反对称贡献作为互补探针可能会导致信息的显着增长。
We present a new estimator for the cross-correlation signal between line intensity maps to probe the Epoch of Reionization. The proposed estimator is the hitherto neglected antisymmetric component of the cross-correlation, under the exchange of line-of-sight positions. We consider the cross-correlation between HI and CO fluctuations, and forecast the improvement in precision on reionization parameters when the antisymmetric contribution is accounted for. As a way to break the degeneracy between astrophysics and cosmology in the intensity mapping power spectrum, we study the ratio between the antisymmetric and symmetric components. While our results depend on the highly uncertain astrophysical modelling, we show that in most standard scenarios including the antisymmetric contribution as a complementary probe can lead to a significant gain in information.
