SKA - EoR correlations and cross-correlations: kSZ, radio galaxies, and NIR background
Vibor Jelic, Benedetta Ciardi, Elizabeth Fernandez, Hiroyuki Tashiro, and Dijana Vrbanec
TL;DR
This paper explores the potential of cross-correlating SKA 21 cm data with kSZ, galaxy surveys, and NIR backgrounds to enhance understanding of the Universe's Cosmic Dawn and Epoch of Reionization.
Contribution
It introduces a framework for analyzing mutual information between different observational probes of the EoR using cross-correlations.
Findings
Cross-correlations can mitigate systematic uncertainties.
Enhanced constraints on EoR timing and structure.
Potential for new insights into the Cosmic Dawn.
Abstract
The Universe's Cosmic Dawn (CD) and Epoch of Reionization (EoR) can be studied using a number of observational probes that provide complementary or corroborating information. Each of these probes suffers from its own systematic and statistical uncertainties. It is therefore useful to consider the mutual information that these data sets contain. In this paper, we discuss a potential of cross-correlations between the SKA cosmological 21 cm data with: (i) the kinetic Sunyaev- Zel'dovich (kSZ) effect in the CMB data; (ii) the galaxy surveys; and (iii) near infrared (NIR) backgrounds.
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Taxonomy
TopicsRadio Astronomy Observations and Technology · Astrophysics and Cosmic Phenomena · Cosmology and Gravitation Theories