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- W4386093364 abstract "The search for alternative cosmological models is largely motivated by thegrowing discordance between the predictions of $Lambda$CDM and the everimproving observations, such as the disparity in the value of $H_0$ measuredat low and high redshifts. One model, in particular, known as the $R_{rm h}=ct$universe, has been highly successful in mitigating or removing all of theinconsistencies. In this picture, however, the anisotropies in the cosmicmicrowave background (CMB) would have emerged at a redshift $zsim 16$, ratherthan via fluctuations in the recombination zone at $zsim 1080$. We demonstratehere that a CMB created in the early Universe, followed by scatteringthrough a Pop III generated dust screen, cannot yet be ruled out by the currentdata. Indeed, the {it Planck} measurements provide a hint of a $sim 2-4%$frequency dependence in the CMB power spectrum, which would be naturally explainedas a variation in the optical depth through the dust, but not a Thomsonscattering-dominated recombination environment. Upcoming measurements shouldbe able to easily distinguish between these two scenarios, e.g., via thedetection of recombination lines at $zsim 1080$, which would completelyeliminate the dust reprocessing idea." @default.
- W4386093364 created "2023-08-24" @default.
- W4386093364 creator A5048777040 @default.
- W4386093364 date "2023-08-22" @default.
- W4386093364 modified "2023-09-26" @default.
- W4386093364 title "A Population III Generated Dust Screen at z~16" @default.
- W4386093364 doi "https://doi.org/10.31219/osf.io/3qa5j" @default.
- W4386093364 hasPublicationYear "2023" @default.
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