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dc.contributor.authorMelia, F.
dc.date.accessioned2024-08-12T20:39:10Z
dc.date.available2024-08-12T20:39:10Z
dc.date.issued2023-02-22
dc.identifier.citationFulvio Melia, The cosmic timeline implied by the JWST high-redshift galaxies, Monthly Notices of the Royal Astronomical Society: Letters, Volume 521, Issue 1, May 2023, Pages L85–L89, https://doi.org/10.1093/mnrasl/slad025
dc.identifier.issn1745-3925
dc.identifier.doi10.1093/mnrasl/slad025
dc.identifier.urihttp://hdl.handle.net/10150/674237
dc.description.abstractThe so-called impossibly early galaxy problem, first identified via the Hubble Space Telescope's observation of galaxies at redshifts z > 10, appears to have been exacerbated by the more recent JWST discovery of galaxy candidates at even higher redshifts (z ∼17) which, however, are yet to be confirmed spectroscopically. These candidates would have emerged only ∼230 Myr after the big bang in the context of Lambda cold dark matter (ΛCDM), requiring a more rapid star formation in the earliest galaxies than appears to be permitted by simulations adopting the concordance model parameters. This time-compression problem would therefore be inconsistent with the age-redshift relation predicted by ΛCDM. Instead, the sequence of star formation and galaxy assembly would confirm the timeline predicted by the Rh = ct universe, a theoretically advanced version of ΛCDM that incorporates the 'zero active mass' condition from general relativity. This model has accounted for many cosmological data better than ΛCDM, and eliminates all of its inconsistencies, including the horizon and initial entropy problems. The latest JWST discoveries at z ≳ 14, if confirmed, would add further support to the idea that the Rh = ct universe is favoured by the observations over the current standard model. © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.
dc.language.isoen
dc.publisherOxford University Press
dc.rights© 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectcosmology: observations
dc.subjectcosmology: theory
dc.subjectgalaxies: formation
dc.subjectgalaxies: high-redshift
dc.subjectlarge-scale structure of the Universe
dc.subjectstars: Population III
dc.titleThe cosmic timeline implied by the JWST high-redshift galaxies
dc.typeArticle
dc.typetext
dc.contributor.departmentDepartment of Physics, University of Arizona
dc.contributor.departmentThe Applied Math Program, University of Arizona
dc.contributor.departmentDepartment of Astronomy, University of Arizona
dc.identifier.journalMonthly Notices of the Royal Astronomical Society: Letters
dc.description.noteImmediate access
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
dc.eprint.versionFinal Published Version
dc.source.journaltitleMonthly Notices of the Royal Astronomical Society: Letters
refterms.dateFOA2024-08-12T20:39:10Z


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