Simulations find the FAST Core Array interferometer can detect HI galaxies to z~1 with enough number density for power spectrum and BAO constraints, while single-dish surveys are shot-noise limited beyond z~0.35.
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Exploring HI Galaxy Redshift Survey Strategies for the FAST Core Array Interferometry
Simulations find the FAST Core Array interferometer can detect HI galaxies to z~1 with enough number density for power spectrum and BAO constraints, while single-dish surveys are shot-noise limited beyond z~0.35.