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Cosmological probes of helium reionization

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arxiv 2212.08004 v2 pith:OZQUFXBG submitted 2022-12-15 astro-ph.CO astro-ph.GA

classification astro-ph.COastro-ph.GA
keywords formationepochheliumreionizationstructureactivityanalysedanalysis
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abstract

Joint analysis of CMB and large-scale structure at high redshifts provide new and unique windows into unexplored epochs of early structure formation. Here, we demonstrate how cosmic infrared background and high-redshift galaxies can be jointly analysed with CMB to probe the epoch of helium reionization ($2<z<4$) on the light cone using kinetic Sunyaev Zel'dovich tomography. Characterising this epoch has great potential significance for understanding astrophysics of galaxy formation, quasar activity and formation of the super-massive black holes. We find a detection at $8-10\sigma$ can be expected from combinations of data from CCAT-prime, Vera Rubin Observatory and CMB-S4 in the upcoming years.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Patchy Helium and Hydrogen Reionization from the Kinetic Sunyaev-Zel'dovich Effect and Galaxies

    astro-ph.CO 2025-06 conditional novelty 6.0 of 10

    Forecasts show that cross-correlating kSZ temperature-squared maps with galaxy-reconstructed velocity-squared maps can jointly constrain hydrogen and helium reionization, making helium measurable with CMB-HD and MegaMapper.

  2. Neutrino Mass Constraints from kSZ Tomography

    astro-ph.CO 2025-02 conditional novelty 5.0 of 10

    kSZ tomography will add little to neutrino mass constraints from Stage IV surveys unless the kSZ optical depth degeneracy is broken.

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