The EDGES Absorption Depth and the Limit on Residual Bounce Heating
Year: 2026
Type: article
Abstract: The absorption depth reported by the EDGES experiment in 2018, roughly twice as deep as the deepest feature adiabatic cooling permits, remains contested. Using the stated cosmology and the brightness-temperature relations described in the Methods, the calculation gives the following headline values: standard depth mK = -267; edges depth mK = -500; required Ts K = 3.4; adiabatic Tg K = 6.0; ratio = 1.77. The comparison values taken from the published record — including the EDGES and SARAS reports, HERA limits and the Planck optical depth where relevant — are used exactly as published, and the bounce contribution enters only through the named timing, heating or shear inputs. The result is a computed prediction for the delayed-onset history, with its sensitivity to each input stated in the Discussion. This study is simulated and computed from stated assumptions; it is not a measurement.
Author: Aldred, William Alexander
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7225833957
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