Hubble distancing: Focusing on distance measurements in cosmology

Greene, Kylar L.; Cyr-Racine, Francis-Yan

doi:10.48550/arxiv.2112.11567

Cited by 3 publications

(3 citation statements)

References 182 publications

(222 reference statements)

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“…In many of the papers discussing the extended cosmology resolution to the Hubble tension, the distance ladder measurements of H 0 are incorporated into the analysis as a Gaussian likelihood. Recently several works [115,116,[237][238][239][240] warned against this practice due to possible caveat on extremely late Universe transitional models. The reason is that local late Universe measurements of H 0 depend on observations of astrophysical objects that extend into the Hubble flow, for example the SH0ES [93] results that have been most frequently quoted uses Pantheon supernovae sample in the redshift range 0.023 < z < 0.15.…”

Section: E Supernovae Absolute Magnitudementioning

confidence: 99%

Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies

Abdalla,

Abellán,

Aboubrahim

et al. 2022

Preprint

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This White Paper has been prepared to fulfill SNOWMASS 2021 requirements and it extends the material previously summarized in the four Letters of Interest [1][2][3][4]. The Particle Physics Community Planning Exercise (a.k.a. SNOWMASS ) is organized by the Division of Particles and Fields of the American Physical Society, and this is an effort to bring together the community of theoretical physicists and cosmologists and identify promising opportunities to address the questions described.This White Paper was initiated with the aim of identifying the opportunities in the cosmological field for the next decade, and strengthening the coordination of the community. It is addressed to identifying the most promising directions of investigation, and rather than attempting a long review of the current status of the whole field of research, it focuses on the upcoming theoretical opportunities and challenges described. The White Paper is a collaborative effort led by Eleonora Di Valentino and Luis Anchordoqui, and it is organized in the topics listed below, each of them coordinated by the scientists indicated (alphabetical order):

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Section: E Supernovae Absolute Magnitudementioning

confidence: 99%

Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies

Abdalla,

Abellán,

Aboubrahim

et al. 2022

Preprint

Self Cite

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“…We checked that going to very high does not change this conclusion. This makes including the contribution of ξ /d A A Ω to the area distance in the distance likelihood code much simpler [51]. Note that the computation of ξ / dA A Ω involves only one momentum integral which can easily be optimised.…”

Section: Ii2 Monopole Of the Area Distance Via Tull Sky Spherical Har...mentioning

confidence: 99%

The art of building a smooth cosmic distance ladder in a perturbed universe

Umeh¹

2022

Preprint

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How does a smooth cosmic distance ladder emerge from observations made from a single location in a lumpy Universe? Distances to the Type Ia supernova (SN1A) in the Hubble flow are anchored on local distance measurements to sources that are not in the Hubble flow. We described how this configuration could be built in a perturbed universe where lumpiness is described as small perturbations on top of a flat Friedmann-Lemaıtre Robertson-Walker (FLRW) spacetime. We show that there is a non-negligible modification (about 11%) to the background FLRW area distance due to the presence of inhomogeneities in the immediate neighbourhood of an observer. We find that the modification is sourced by the electric part of the Weyl tensor indicating a tidal deformation of the local spacetime of the observer. We show in detail how it impacts the calibration of the SN1A absolute magnitude in the Hubble flow. We show that it resolves the SN1A absolute magnitude and Hubble tension simultaneously without the need for any of the dark stuff.

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“…where v LoS is the line of sight (LoS) velocity to the localised MASER emission around the supermassive black hole, ∂ θ v LoS is the gradient of v LoS on the sky, a LoS is the LoS acceleration and θ is the angle on the sky as measured by the observer [49].…”

Section: Apparent Magnitude and Calibration Of The Cosmic Distance La...mentioning

confidence: 99%

Emergence of smooth distance and apparent magnitude in a lumpy Universe

Umeh

2022

Class. Quantum Grav.

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The standard interpretation of observations such as the peak apparent magnitude of Type Ia supernova made from one location in a lumpy Universe is based on the idealised Friedmann-Lemaître Robertson-Walker spacetime. All possible corrections to this model due to inhomogeneities are usually neglected. Here, we use the result from the recent concise derivation of the area distance in an inhomogeneous universe to study the monopole and Hubble residual of the apparent magnitude of Type Ia supernovae. We find that at low redshifts, the background FLRW spacetime model of the apparent magnitude receives corrections due to relative velocity perturbation in the observed redshift. We show how this velocity perturbation could contribute to a variance in the Hubble residual and how it could impact the calibration of the absolute magnitude of the Type Ia supernova in the Hubble flow. We also show that it could resolve the tension in the determination of the Hubble rate from the baryon acoustic oscillation and local measurements.

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Hubble distancing: Focusing on distance measurements in cosmology

Cited by 3 publications

References 182 publications

Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies

Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies

The art of building a smooth cosmic distance ladder in a perturbed universe

Emergence of smooth distance and apparent magnitude in a lumpy Universe

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