dc.contributor.author Melia, F. dc.contributor.author Wei, J.-J. dc.contributor.author Maier, R.S. dc.contributor.author Wu, X.-F. dc.date.accessioned 2018-12-14T20:30:46Z dc.date.available 2018-12-14T20:30:46Z dc.date.issued 2018-10-05 dc.identifier.citation Melia, F., Wei, J. J., Maier, R. S., & Wu, X. F. (2018). Cosmological tests with the joint lightcurve analysis. EPL (Europhysics Letters), 123(5), 59002. en_US dc.identifier.issn 1286-4854 dc.identifier.doi 10.1209/0295-5075/123/59002 dc.identifier.uri http://hdl.handle.net/10150/631186 dc.description.abstract We examine whether a comparison between wCDM and $R_{\textrm{h}}=ct$ using merged Type-Ia SN catalogs produces results consistent with those based on a single homogeneous sample. Using the Betoule et al. (Astron. Astrophys., 568 (2014) 22). Joint Lightcurve Analysis (JLA) of a combined sample of 613 events from SNLS and SDSS-II, we estimate the parameters of the two models and compare them. We find that the improved statistics can alter the model selection in some cases, but not others. In addition, based on the model fits, we find that there appears to be a lingering systematic offset of ~0.04–0.08 mag between the SNLS and SDSS-II sources, in spite of the cross-calibration in the JLA. Treating wCDM, ΛCDM and $R_{\textrm{h}}=ct$ as separate models, we find in an unbiased pairwise statistical comparison that the Bayes Information Criterion (BIC) favors the $R_{\textrm{h}}=ct$ Universe with a likelihood of $82.8\%$ vs. $17.2\%$ for wCDM, but the ratio of likelihoods is reversed ($16.2\%$ vs. $83.8\%$ ) when $w_{\textrm{de}}=-1$ (i.e., ΛCDM) and strongly reversed ($1.0\%$ vs. $99.0\%$ ) if in addition k = 0 (i.e., flat ΛCDM). We point out, however, that the value of k is a measure of the net energy (kinetic plus gravitational) in the Universe and is not constrained theoretically, though some models of inflation would drive $k\rightarrow 0$ due to an expansion-enforced dilution. Since we here consider only the basic ΛCDM model, the value of k needs to be measured and, therefore, the pre-assumption of flatness introduces a significant bias into the BIC. en_US dc.language.iso en en_US dc.publisher EPL ASSOCIATION en_US dc.relation.url http://iopscience.iop.org/article/10.1209/0295-5075/123/59002 en_US dc.rights Copyright © EPLA, 2018 en_US dc.title Cosmological tests with the joint lightcurve analysis en_US dc.type Article en_US dc.contributor.department Univ Arizona, Dept Phys, Appl Math Program en_US dc.contributor.department Univ Arizona, Dept Astron en_US dc.contributor.department Univ Arizona, Dept Phys en_US dc.contributor.department Univ Arizona, Dept Math en_US dc.contributor.department Univ Arizona, Statistics Program en_US dc.identifier.journal EPL (Europhysics Letters) en_US dc.description.note 12 month embargo; published 5 October 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 EPL (Europhysics Letters) dc.source.volume 123 dc.source.issue 5 dc.source.beginpage 59002
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