AffiliationDepartment of Physics, The Applied Math Program, Department of Astronomy, The University of Arizona
MetadataShow full item record
PublisherIOP Publishing Ltd
CitationMelia, F. (2022a). A measurement of the cosmic expansion within our lifetime. European Journal of Physics.
JournalEuropean Journal of Physics
Rights© 2022 European Physical Society.
Collection InformationThis 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 email@example.com.
AbstractThe most exciting future observation in cosmology will feature a monitoring of the cosmic expansion in real time, unlike anything that has ever been attempted before. This campaign will uncover crucial physical properties of the various constituents in the universe, and perhaps answer a simpler question concerning whether or not the cosmic expansion is even accelerating. An unambiguous yes/no response to this query will significantly impact cosmology, of course, but also the standard model of particle physics. Here, we discuss - in a straightforward way - how to understand the so-called 'redshift drift' sought by this campaign, and why its measurement will help us refine the standard-model parameters if the answer is 'yes.' A 'no' answer, on the other hand, could be more revolutionary, in the sense that it might provide a resolution of several long-standing problems and inconsistencies in our current cosmological models. An outcome of zero redshift drift, for example, would obviate the need for a cosmological constant and render inflation completely redundant.
Note12 month embargo; published: 22 February 2022
VersionFinal accepted manuscript