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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

I present our analysis of the 21cm power spectrum upper limits from the HERAradio interferometer, published in HERA Collaboration et al. 2022. We use therecent limits to constrain reionization and the properties of the IGM andgalaxies in the early universe. I focus in particular on the possibility of aradio background in addition to the CMB (e.g. produced by early galaxies) whichcan lead to a stronger 21cm signal and is thus easier to constrain. I show whatlimits the HERA observations can put on these models and the IGM, and how thiscompares to existing constraints on the radio and X-ray background.

Contribution to the 2022 Cosmology session of the 56th Rencontres de Moriond: Reionization constraints from HERA 21cm power spectrum limits