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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

The temperature of the low-density intergalactic medium (IGM) at highredshift is sensitive to the timing and nature of hydrogen and HeIIreionization, and can be measured from Lyman-alpha forest absorption spectra.Since the memory of intergalactic gas to heating during reionization graduallyfades, measurements as close as possible to reionization are desirable. Inaddition, measuring the IGM temperature at sufficiently high redshifts shouldhelp to isolate the effects of hydrogen reionization since HeII reionizationstarts later, at lower redshift. Motivated by this, we model the IGMtemperature at z>5 using semi-numeric models of patchy reionization. Weconstruct mock Lyman-alpha forest spectra from these models and consider theirobservable implications. We find that the small-scale structure in theLyman-alpha forest is sensitive to the temperature of the IGM even at redshiftswhere the average absorption in the forest is as high as 90%. We forecast theaccuracy at which the z~5 IGM temperature can be measured using existingsamples of high resolution quasar spectra, and find that interestingconstraints are possible. For example, an early reionization model in whichreionization ends at z~10 should be distinguishable -- at high statisticalsignificance -- from a lower redshift model where reionization completes atz~6. We discuss improvements to our modeling that may be required to robustlyinterpret future measurements.

On Modeling and Measuring the Temperature of the z~5 IGM