SKAO 时代利用功率谱之外的统计量进行强度映射宇宙学
宇宙学与河外天体物理
2026-06-29 v1
摘要
再电离后时代中性氢（HI）的宇宙学分布由于底层非线性结构形成、复杂的星系偏袒以及潜在的原初非高斯性而高度非高斯。需要高阶（超过两点）统计量来最大程度地从 21-cm 强度图中提取非高斯信息。本章总结了多种高阶统计量的潜力，包括体素强度分布、发射线叠加、概率密度函数、-范数、双谱和各种标记统计量。此外，基于图像的形态学描述符，如最大团簇统计量、局域维数和 Minkowski 泛函等，有可能表征 21-cm 强度图中编码的宇宙网的形态和几何。本章在未来的 SKAO 观测背景下，对这些高阶统计量的可探测性进行了预测。这些预测在其分析中包含了仪器噪声、观测效应，在某些情况下还包括前景移除。凭借其前所未有的灵敏度，未来的 SKAO 21-cm 观测将使我们能够更精确地测量这些高阶统计量，可能有助于打破天体物理和宇宙学参数之间的简并，并最大化这些巡天的科学成果。
关键词
引用
@article{arxiv.2606.30200,
title = {Cosmology with Intensity Mapping via Statistics Beyond the Power Spectrum in the SKAO Era},
author = {Suman Majumdar and Debanjan Sarkar and Leon Noble and Manas Mohit Dosibhatla and Zhaoting Chen and Bernhard Vos-Ginés and Vishrut Pandya and Mohd Kamran and Sourav Pal and Chandra Shekhar Murmu and Cora Uhlemann and Pauline Gorbatchev and Jean-Luc Starck and José Luis Bernal and Marta Spinelli and Caroline S. Heneka and Matteo Viel and Gabriella De Lucia and Fabio Fontanot and Stefano Camera and Steve Cunnington and Benedetta Spina and Dionysis Karagiannis and Samit Kumar Pal and Anshuman Tripathi and Sarah Libanore and Abinash Kumar Shaw and Rajesh Mondal and Yashrajsinh Mahida and Yashar Akrami and Philip Bull and Chris Clarkson and Abhirup Datta and José Fonseca and Yin-Zhe Ma and Roy Maartens and Liantsoa F. Randrianjanahary and Martin Sahlen and Xin Wang and Yougang Wang and Jochen Weller},
journal= {arXiv preprint arXiv:2606.30200},
year = {2026}
}
备注
Published in Advancing Astrophysics with the SKA II (AASKAII), 2026 (arXiv:2606.20366). Report-no:AASKAII/Majumdar01. Advancing Astrophysics with the SKA II (AASKAII) outlines the transformative scientific advances that will be enabled by the SKA telescopes