Supernovae evidence for foundational change to cosmological models
2024/11/28 by Antonia Seifert, Zachary G. Lane, Marco Galoppo +2 · 12 voices · 5 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Gamma-ray bursts and supernovae #Galaxies: Formation, Evolution, Phenomena
paper · pdf · doi:10.1093/mnrasl/slae112
Abstract
ABSTRACT We present a new, cosmologically model-independent, statistical analysis of the Pantheon+ Type Ia Supernovae spectroscopic data set, improving a standard methodology adopted by Lane et al. We use the Tripp equation for supernova standardization alone, thereby avoiding any potential correlation in the stretch and colour distributions. We compare the standard homogeneous cosmological model, i.e. spatially flat Λ cold dark matter (ΛCDM), and the timescape cosmology which invokes backreaction of inhomogeneities. Timescape, while statistically homogeneous and isotropic, departs from average Friedmann–Lemaître–Robertson–Walker evolution, and replaces dark energy by kinetic gravitational energy and its gradients, in explaining independent cosmological observations. When considering the entire Pantheon+ sample, we find very strong evidence (ln B\gt 5) in favour of timescape over ΛCDM. Furthermore, even restricting the sample to redshifts beyond any conventional scale of statistical homogeneity, z \gt 0.075, timescape is preferred over ΛCDM with ln B\gt 1. These results provide evidence for a need to revisit the foundations of theoretical and observational cosmology.
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Discussions
- Supernovae Evidence for Foundational Change to Cosmological Models [hn, 107 points, 74 comments]
- Dr. Ryan Ridden – Does Dark Energy Exist? The Timescape Model Says No (14:16) [lemmy, 17 points, 0 comments]
- (1) Publicação do estudo: Lane et al. (2024). Supernovae evidence for foundational change to cosmological models. Monthly Notices of the Royal Astronomical Society: Letters, Volume 537, Issue 1, Page [bsky, 4 points, 1 comments]
- Enllaços a l'article i la nota de premsa: arxiv.org/pdf/2412.15143 academic.oup.com/mnras/articl... www.sciencedaily.com/releases/202... [bsky, 0 points, 1 comments]
- Supernovae Evidence for Foundational Change to Cosmological Models https://arxiv.org/abs/2412.15143 [comments] [15 points] [bsky, 0 points, 0 comments]
- Supernovae Evidence for Foundational Change to Cosmological Models (arxiv.org) Main Link | Discussion [bsky, 0 points, 0 comments]
- wait... this is different than the recent observations reported here? Antonia Seifert et. al. "Supernovae evidence for foundational change to cosmological models" arxiv.org/pdf/2412.151... [bsky, 0 points, 1 comments]
- A fundamental rewrite of the standard model of cosmology is the conclusion from a new paper lead by University of Canterbury physicists: Supernovae evidence for foundational change to cosmological mod [bsky, 0 points, 0 comments]
- @dudedarkmatter.bsky.social Esteemed sir, U had an "I told you so" w/CDM). I now challenge you to be DudeDarkEnergy & embrace timescape model (cosmic voids distort local views of distant space) lik [bsky, 0 points, 0 comments]
- Supernovae evidence for foundational change to cosmological models Oxford Academic doi.org/10.1093/mnra... [bsky, 0 points, 0 comments]
- Supernovae Evidence for Foundational Change to Cosmological Models https://arxiv.org/abs/2412.15143 (https://news.ycombinator.com/item?id=42495703) [bsky, 0 points, 0 comments]
- Supernovae Evidence for Foundational Change to Cosmological Models https://arxiv.org/abs/2412.15143 (https://news.ycombinator.com/item?id=42495703) [bsky, 0 points, 0 comments]
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