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2021

Astrophysics & Cosmology from Line Intensity Mapping vs Galaxy Surveys

Schaan, Emmanuel, White, Martin

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Line intensity mapping (LIM) proposes to efficiently observe distant faint galaxies and map the matter density field at high redshift.

Building upon the formalism in the companion paper, we first highlight the degeneracies between cosmology and astrophysics in LIM.
We discuss what can be constrained from measurements of the mean intensity and redshift-space power spectra.
With a sufficient spectral resolution, the large-scale redshift-space distortions of the 2-halo term can be measured, helping to break the degeneracy between bias and mean intensity.

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