On the robustness of the constancy of the Supernova absolute magnitude: Non-parametric reconstruction &amp; Bayesian approaches

Benisty, David; Mifsud, Jurgen; Said, Jackson Levi; Staicova, Denitsa

doi:10.1016/j.dark.2022.101160

Cited by 27 publications

(13 citation statements)

References 88 publications

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“…We also reconstruct the absolute magnitude of SNIa as a function of the redshift, M (z), and check that no evolution is preferred by current data. This analysis is on the lines of the one by Benisty et al (2023), but we use different data sets, have a better control of the effect of correlations and get rid of double-counting issues. Finally, we perform a consistency test among the BAO data points employed in this paper, and show that according to the low-redshift data sets under consideration, there is no significant statistical tension between them.…”

Section: Introductionmentioning

confidence: 99%

Cosmic chronometers to calibrate the ladders and measure the curvature of the Universe. A model-independent study

Favale¹,

Gómez-Valent²,

Migliaccio³

2023

Preprint

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We use the state-of-the-art data on cosmic chronometers (CCH) and the Pantheon+ compilation of supernovae of Type Ia (SNIa) to test the constancy of the SNIa absolute magnitude, M , and the robustness of the cosmological principle (CP) at z 2 with a model-agnostic approach. We do so by reconstructing M (z) and the curvature parameter Ω k (z) using Gaussian Processes. Moreover, we use CCH in combination with radial and angular data on baryon acoustic oscillations (BAO) from various galaxy surveys (6dFGS, BOSS, eBOSS, WiggleZ, DES Y3) to measure the sound horizon at the baryon-drag epoch, r d , from each BAO data point and check their consistency. Given the precision allowed by the CCH data, we find that M (z), Ω k (z) and r d (z) are fully compatible (at < 68% C.L.) with constant values. This justifies our final analyses, in which we put constraints on these constant parameters under the validity of the CP, the metric description of gravity and standard physics in the vicinity of the stellar objects, but otherwise in a model-independent way. If we exclude the SNIa contained in the host galaxies employed by SH0ES, our results read M = (−19.314 +0.086 −0.108 ) mag, r d = (142.3 ± 5.3) Mpc and Ω k = −0.07 +0.12 −0.15 (68% C.L.). These values have been obtained without using any information from the main data sets involved in the H 0 tension, namely, the cosmic microwave background and the first two rungs of the cosmic distance ladder. If, instead, we also consider the SNIa in the host galaxies, calibrated with Cepheids, we measure M = (−19.252 +0.024 −0.036 ) mag, r d = (141.9 +5.6 −4.9 ) Mpc and Ω k = −0.10 +0.12 −0.15 .

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Section: Introductionmentioning

confidence: 99%

Cosmic chronometers to calibrate the ladders and measure the curvature of the Universe. A model-independent study

Favale¹,

Gómez-Valent²,

Migliaccio³

2023

Preprint

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“…Systematic uncertainties related to the choice of Cepheid color-luminosity calibration could be behind the disagreement [243] or the supernovae type Ia (SNIa) luminosities could evolve with redshift [147]. The constancy of the latter has been tested and current data is inconclusive [56]. This uncertainty leads to degeneracies between the Hubble constant, DE parameters and SNIa systematics [123].…”

Section: Introductionmentioning

confidence: 99%

Further understanding the interaction between dark energy and dark matter: current status and future directions

Wang,

Abdalla,

Atrio-Barandela

et al. 2024

Rep. Prog. Phys.

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The interaction between dark matter and dark energy can be in- corporated into field theory models of dark energy that have proved successful in alleviating the coincidence problem. We review recent advances in this field, including new models and constraints from dif- ferent astronomical data sets. We show that interactions are allowed by observations and can reduce the current tensions among different measurements of cosmological parameters. We extend our discussion to include constraints from non-linear effects and results from cosmo- logical simulations. Finally, we discuss forthcoming multi-messenger data from current and future observational facilities that will help to improve our understanding of the interactions within the dark sector.

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“…In recent years, there have been several proposals for a diversity of different classes of modifications to the gravitational sector, which have been shown to tackle a range of physical problems [2,31,[50][51][52][53][54]. One interesting class of models are Ricci-based ones, among which Palatini f (R) is the simplest, apart from General Relativity (GR), and the most studied extensions of the Einstein's proposal.…”

Section: Introductionmentioning

confidence: 99%

Cosmological constraints of Palatini f(ℛ) gravity

Gomes,

Briffa,

Kozak

et al. 2024

J. Cosmol. Astropart. Phys.

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In this study, we investigate a Palatini f(R) gravity model featuring a quadratic term correction, aligning it with the most recent expansion rate data, with a particular focus on the latest SNIa and BAO data. Our analysis employs CC data as the fundamental dataset, complemented by contributions from the SN sample and a combination of non-overlapping transversal BAO datasets. We conduct a comprehensive MCMC analysis for each data set combination, yielding constraints on all cosmological parameters within the model. Additionally, we incorporate the latest Hubble constant value from the SH0ES Team. Finally, we present a statistical comparison between the Palatini quadratic model and ΛCDM using the AIC and BIC metrics, ultimately obtaining the constraint |α| ≤ 1049 m2. We also stress the significance of studying stellar and substellar objects for obtaining more precise constraints on modified gravity compared to those derived from cosmological observations.

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On the robustness of the constancy of the Supernova absolute magnitude: Non-parametric reconstruction & Bayesian approaches

Cited by 27 publications

References 88 publications

Cosmic chronometers to calibrate the ladders and measure the curvature of the Universe. A model-independent study

Cosmic chronometers to calibrate the ladders and measure the curvature of the Universe. A model-independent study

Further understanding the interaction between dark energy and dark matter: current status and future directions

Cosmological constraints of Palatini f(ℛ) gravity

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