@article{249e80a85f2c4995903a956c0723098c,
title = "Probing helium reionization with kinetic Sunyaev-Zel'dovich tomography",
abstract = "Reionization of helium is expected to occur at redshifts z∼3 and have important consequences for quasar populations, galaxy formation, and the morphology of the intergalactic medium, but there is little known empirically about the process. Here we show that kinetic Sunyaev-Zel'dovich tomography, based on the combination of cosmic microwave background (CMB) measurements and galaxy surveys, can be used to infer the primordial helium abundance as well as the time and duration of helium reionization. We find a high-significance detection at ∼10σ can be expected from Vera Rubin Observatory and CMB-S4 in the near future. A more robust characterization of helium reionization will require next-generation experiments like MegaMapper (a proposed successor to the Dark Energy Spectroscopic Instrument) and CMB-HD.",
author = "Hotinli, {Selim C.} and Simone Ferraro and Holder, {Gilbert P.} and Johnson, {Matthew C.} and Marc Kamionkowski and {La Plante}, Paul",
note = "Funding Information: We thank Joel Meyers, Colin Hill, Alex van Engelen and Patrick Hall for useful discussions. This work was started in part at the Aspen Center for Physics, which is supported by National Science Foundation (NSF) Grant No. PHY-1607611. S. C. H. is supported by the Horizon Fellowship from Johns Hopkins University. S. C. H. also acknowledges the support of a grant from the Simons Foundation at the Aspen Center for Physics. S. F. is supported by the Physics Division of Lawrence Berkeley National Laboratory. G. P. H. is supported by Brand and Monica Fortner and the Canadian Insitute for Advanced Research. M. C. J. is supported by the National Science and Engineering Research Council through a Discovery grant. This research was supported in part by Perimeter Institute for Theoretical Physics. Research at Perimeter Institute is supported by the Government of Canada through the Department of Innovation, Science and Economic Development Canada and by the Province of Ontario through the Ministry of Research, Innovation and Science. M. K. was supported by NSF Grant No. 2112699 and the Simons Foundation. P. L. is supported by NSF Grant No. 2206602. Publisher Copyright: {\textcopyright} 2023 American Physical Society.",
year = "2023",
month = may,
day = "15",
doi = "10.1103/PhysRevD.107.103517",
language = "English (US)",
volume = "107",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society",
number = "10",
}