In simulations, foreground-cleaned 21 cm hydrogen–galaxy cross-power spectra recover the dynamical dark energy parameters (w0, wa) without bias when galaxy redshift bins are narrow.
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Unveiling dark energy properties with high-sensitivity cross-correlations of neutral hydrogen intensity mapping and galaxy surveys
In simulations, foreground-cleaned 21 cm hydrogen–galaxy cross-power spectra recover the dynamical dark energy parameters (w0, wa) without bias when galaxy redshift bins are narrow.