Model selection using cosmic chronometers with Gaussian Processes
dc.contributor.author | Melia, Fulvio | |
dc.contributor.author | Yennapureddy, Manoj K. | |
dc.date.accessioned | 2018-12-14T20:22:55Z | |
dc.date.available | 2018-12-14T20:22:55Z | |
dc.date.issued | 2018-02-19 | |
dc.identifier.issn | 1475-7516 | |
dc.identifier.doi | 10.1088/1475-7516/2018/02/034 | |
dc.identifier.uri | http://hdl.handle.net/10150/631185 | |
dc.description.abstract | The use of Gaussian Processes with a measurement of the cosmic expansion rate based solely on the observation of cosmic chronometers provides a completely cosmology-independent reconstruction of the Hubble constant H(z) suitable for testing different models. The corresponding dispersion σH is smaller than ~ 9% over the entire redshift range (lesssim zlesssim 20) of the observations, rivaling many kinds of cosmological measurements available today. We use the reconstructed H(z) function to test six different cosmologies, and show that it favours the Rh=ct universe, which has only one free parameter (i.e., H0) over other models, including Planck ΛCDM . The parameters of the standard model may be re-optimized to improve the fits to the reconstructed H(z) function, but the results have smaller p-values than one finds with Rh=ct. | en_US |
dc.language.iso | en | en_US |
dc.relation.url | http://stacks.iop.org/1475-7516/2018/i=02/a=034?key=crossref.6218c22b81727030051600e72e64ef11 | en_US |
dc.relation.url | https://arxiv.org/abs/1802.02255 | en_US |
dc.rights | © 2018 IOP Publishing Ltd and Sissa Medialab. | en_US |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | |
dc.subject | cosmology of theories beyond the SM | en_US |
dc.subject | galaxy evolution | en_US |
dc.subject | cosmic flows | en_US |
dc.subject | star formation | en_US |
dc.title | Model selection using cosmic chronometers with Gaussian Processes | en_US |
dc.type | Article | en_US |
dc.contributor.department | Univ Arizona, Dept Phys, Appl Math Program | en_US |
dc.contributor.department | Univ Arizona, Steward Observatory | en_US |
dc.contributor.department | Univ Arizona, Dept Phys | en_US |
dc.identifier.journal | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | en_US |
dc.description.note | 12 month embargo; published 19 February 2018 | en_US |
dc.description.collectioninformation | This 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. | en_US |
dc.eprint.version | Final accepted manuscript | en_US |
dc.source.journaltitle | Journal of Cosmology and Astroparticle Physics | |
dc.source.volume | 2018 | |
dc.source.issue | 02 | |
dc.source.beginpage | 034 | |
dc.source.endpage | 034 |