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- W4362637788 abstract "We study the reconstructed deceleration parameter splitting the data in different redshift bins, fitting both a cosmographic luminosity distance and also assuming a flat ΛCDM model, using the Pantheon+ sample of type Ia supernova data (SNIA). We observe tensions ∼2σ−3σ for different redshift and distance indicators if the full sample is used. However, those tensions disappear when the SNIA at z<0.008 are removed. If the data is splitted in 2 hemispheres according to our movement w.r.t CMB, a strange 3.8σ tension appears in one of the samples between particular redshift bins. Finally, considering posterior distribution as Gaussian, general linear model prefers a positive slope for q0 across redshift bins opposed to a zero slope expected in a ΛCDM universe. We discuss possible explanations for our results and the influence of lowest redshift SNIA data in cosmological analysis." @default.
- W4362637788 created "2023-04-07" @default.
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- W4362637788 date "2023-05-01" @default.
- W4362637788 modified "2023-09-25" @default.
- W4362637788 title "Testing <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline id=d1e2629 altimg=si119.svg><mml:mi>Λ</mml:mi></mml:math>CDM cosmology in a binned universe: Anomalies in the deceleration parameter" @default.
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- W4362637788 doi "https://doi.org/10.1016/j.dark.2023.101224" @default.
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