Insights from probability distribution functions of intensity maps

Insights from probability distribution functions of intensity maps
复制标题

强度图概率分布函数的见解

DOI:
10.1093/mnras/stx203
复制
发表时间:
2016
影响因子:
4.8
通讯作者:
M. Kamionkowski
M. Kamionkowski
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
P. Breysse;E. Kovetz;P. Behroozi;L. Dai;M. Kamionkowski

文献摘要

参考文献

被引文献

相似文献

在接下来的几年里,以CO、Ly$\α$和CII等谱线为目标的强度图探测将为高红移天体物理学提供强大的探测器。然而,这些线路辐射是高度非高斯的,因此用于研究这些地图的典型功率谱方法将遗漏大量信息。我们提出了一种新的统计量,即体素强度的概率分布,它可以获取这些额外的信息。以一个CO强度图的模型为例,我们证明了这种体素强度分布(VID)提供了比仅从功率谱获得的更大的约束能力。我们发现,未来类似于计划中的COMAP全面实验的调查可能会将CO光度函数限制在$sim10$数量级。我们还探索了来自连续发射、入侵线和引力透镜的污染对我们的约束的影响,发现即使在悲观的情况下,VID统计仍然保持着显著的约束能力。
In the next few years, intensity-mapping surveys that target lines such as CO, Ly$\alpha$, and CII stand to provide powerful probes of high-redshift astrophysics. However, these line emissions are highly non-Gaussian, and so the typical power-spectrum methods used to study these maps will leave out a significant amount of information. We propose a new statistic, the probability distribution of voxel intensities, which can access this extra information. Using a model of a CO intensity map at $z\sim3$ as an example, we demonstrate that this voxel intensity distribution (VID) provides substantial constraining power beyond what is obtainable from the power spectrum alone. We find that a future survey similar to the planned COMAP Full experiment could constrain the CO luminosity function to order $\sim10\%$. We also explore the effects of contamination from continuum emission, interloper lines, and gravitational lensing on our constraints and find that the VID statistic retains significant constraining power even in pessimistic scenarios.
DOI: 10.1051/0004-6361/201525836
发表时间: 2016-10-01
影响因子: 6.5
作者:
Ade, P. A. R.;Aghanim, N.;Zonca, A.
通讯作者: Zonca, A.
DOI: 10.1051/0004-6361/201220873
发表时间: 2013-08-01
影响因子: 6.5
作者:
van Haarlem, M. P.;Wise, M. W.;van Zwieten, J.
通讯作者: van Zwieten, J.
DOI: 10.1088/1538-3873/129/974/045001
发表时间: 2017-04-01
影响因子: 3.5
作者:
DeBoer, David R.;Parsons, Aaron R.;Zheng, Haoxuan
通讯作者: Zheng, Haoxuan