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26 April 2024 |
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Cosmology with the Highly Redshifted 21cm Line | | Adrian Liu
; James Aguirre
; Yacine Ali-Haimoud
; Marcelo Alvarez
; Adam Beardsley
; George Becker
; Judd Bowman
; Patrick Breysse
; Volker Bromm
; Philip Bull
; Jack Burns
; Isabella P. Carucci
; Tzu-Ching Chang
; Xuelei Chen
; Hsin Chiang
; Joanne Cohn
; David DeBoer
; Joshua Dillon
; Olivier Doré
; Cora Dvorkin
; Anastasia Fialkov
; Steven Furlanetto
; Nick Gnedin
; Bryna Hazelton
; Jacqueline Hewitt
; Daniel Jacobs
; Kirit Karkare
; Marc Klein Wolt
; Saul Kohn
; Leon Koopmans
; Ely Kovetz
; Paul La Plante
; Adam Lidz
; Yin-Zhe Ma
; Yi Mao
; Kiyoshi Masui
; Andrei Mesinger
; Jordan Mirocha
; Julian Munoz
; Steven Murray
; Laura Newburgh
; Aaron Parsons
; Jonathan Pober
; Jonathan Pritchard
; Benjamin Saliwanchik
; Jonathan Sievers
; Nithyanandan Thyagarajan
; Hy Trac
; Eli Visbal
; Matias Zaldarriaga
; | | Date: |
14 Mar 2019 | | Abstract: | In addition to being a probe of Cosmic Dawn and Epoch of Reionization
astrophysics, the 21cm line at $z>6$ is also a powerful way to constrain
cosmology. Its power derives from several unique capabilities. First, the 21cm
line is sensitive to energy injections into the intergalactic medium at high
redshifts. It also increases the number of measurable modes compared to
existing cosmological probes by orders of magnitude. Many of these modes are on
smaller scales than are accessible via the CMB, and moreover have the advantage
of being firmly in the linear regime (making them easy to model theoretically).
Finally, the 21cm line provides access to redshifts prior to the formation of
luminous objects. Together, these features of 21cm cosmology at $z>6$ provide
multiple pathways toward precise cosmological constraints. These include the
"marginalizing out" of astrophysical effects, the utilization of redshift space
distortions, the breaking of CMB degeneracies, the identification of signatures
of relative velocities between baryons and dark matter, and the discovery of
unexpected signs of physics beyond the $Lambda$CDM paradigm at high redshifts. | | Source: | arXiv, 1903.6240 | | Services: | Forum | Review | PDF | Favorites | |
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