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Cross-correlation of 21cm intensity mapping and galaxy surveys for cosmology

Published on:

1 September 2023

Primary Category:

Cosmology and Nongalactic Astrophysics

Paper Authors:

Maria Berti,

Marta Spinelli,

Matteo Viel

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Key Details

Forecasts cosmological constraints from 21cm×galaxy cross-correlations

Focuses on future SKAO, Euclid and DESI observations

Cross-correlation improves Planck constraints on H_0 and Ω_c h^2

Cross-correlation carries complementary information to 21cm auto-correlation

AI generated summary

Cross-correlation of 21cm intensity mapping and galaxy surveys for cosmology

This paper forecasts constraints on cosmological parameters from cross-correlating 21cm intensity mapping observations with galaxy redshift surveys. It focuses on future SKAO and Euclid or DESI surveys. The cross-correlation signal seems effective at constraining parameters like H_0, improving Planck CMB constraints. It carries complementary information to 21cm auto-correlation.

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