English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The Epoch of Reionization (EoR)---when neutral hydrogen in the intergalacticmedium was systematically ionized---is a period in our Universe's history thatis currently poorly understood. However, a key prediction of most models is acorrelation between the density and ionization field during the EoR. This hasconsequences for the 21cm power spectrum. Here, we propose a parametrizationfor the density-ionization correlation and study the dependence of the 21cmpower spectrum on this parameterization. We use this formalism to forecast theability of current and future observations to constrain these correlations. Wefind that upper limits on the dimensionless power spectrum at redshifts $7.5 <z < 8.5$ using $k$ bins between $0.1\,\textrm{Mpc}^{-1} < k <0.75\,\textrm{Mpc}^{-1}$ with error bars at the level of$\sim\!\!20\,\textrm{mK}^2$ about our fiducial model would rule outuncorrelated reionization at $99\%$ credibility. Beyond upper limits, we findthat at its full sensitivity, the Hydrogen Epoch of Reionization Array (HERA)will be able to place strong constraints on the sign and magnitude ofdensity-ionization correlations.

Quantifying Density-Ionization Correlations with the 21cm Power Spectrum