New tests of the cosmic distance duality relation with the baryon acoustic oscillation and type Ia supernovae

Xu, Bing; Huang, Qihong

doi:10.1140/epjp/s13360-020-00444-2

Cited by 13 publications

(10 citation statements)

References 39 publications

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“…The DDR is a very simple, yet powerful relation that has been constrained with data [26][27][28][29][30][31] and has also been used in the literature to constrain the cosmological model (see e.g. [32,33]).…”

Section: Distance Duality Relation As a Way To Constrain H0mentioning

confidence: 99%

“…We start multiplying and divide η by H(z)/H 0 . Further, given the existing tight experimental constraints on DDR that allow tiny deviations of the order of 10 −2 − 10 −1 [26][27][28][29][30][31], as well as the very few and general assumptions at its basis, we will set η = 1 for the rest of this work. We can then re-arrange the DDR relation to get…”

Section: Distance Duality Relation As a Way To Constrain H0mentioning

confidence: 99%

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A look at the Hubble speed from first principles

Renzi¹,

Silvestri²

2020

Preprint

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We introduce a novel way of measuring H0 from a combination of independent geometrical datasets, namely Supernovae, Baryon Acoustic Oscillations and Cosmic Chronometers, without the need of calibration nor of the choice of a cosmological model. Our method builds on the distance duality relation which sets the ratio of luminosity and angular diameter distances to a fixed scaling with redshift, for any metric theory of gravity with standard photon propagation. In our analysis of the data we employ Gaussian Process algorithms to obtain constraints that are independent from the underlying cosmological model. We find H0 = 69.5 ± 1.7 Km/s/Mpc, showing that it is possible to constrain H0 with an accuracy of 2% with minimal assumptions. While competitive with current astrophysical and cosmological constraints, our result is not precise enough to solve the Hubble tension in a definitive way. However, we uncover some interesting features that hint at a twofold solution of the tension.

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Section: Distance Duality Relation As a Way To Constrain H0mentioning

confidence: 99%

Section: Distance Duality Relation As a Way To Constrain H0mentioning

confidence: 99%

A look at the Hubble speed from first principles

Renzi¹,

Silvestri²

2020

Preprint

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“…This quantity can be obtained by SNe Ia luminosity distance measurements with identical redshifts from those of the SGL system sample. Since the SNe Ia observations also can are affected by a varying α, we shall consider a deformed CDDR as [59,60] and the fact that η 2 (z) = φ(z) [53]. Then, one may obtain:…”

Section: By Considering the Definitions D ≡ D A Ls D As And D A T ≡ D A L D As D A Lsmentioning

confidence: 99%

Gravitational lens time-delay as a probe of a possible time variation of the fine-structure constant

2021

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A new method based on large scale structure observations is proposed to probe a possible temporal variation of the fine-structure constant ($$\alpha $$ α ). Our analyses are based on time-delay of Strong Gravitational Lensing and Type Ia Supernovae observations. By considering the runaway dilaton scenario, where the cosmological temporal evolution of the fine-structure constant is given by $$\frac{\Delta \alpha }{\alpha } \approx -\gamma \ln {(1+z)}$$ Δ α α ≈ - γ ln ( 1 + z ) , we obtain limits on the physical properties parameter of the model ($$\gamma $$ γ ) at the level $$10^{-2}$$ 10 - 2 ($$1\sigma $$ 1 σ ). Although our limits are less restrictive than those obtained by quasar spectroscopy, the approach presented here provides new bounds on the possibility of $$\frac{\Delta \alpha }{\alpha } \ne 0$$ Δ α α ≠ 0 at a different range of redshifts.

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“…To obtain constraints on 𝜂(𝑧), we parameterise its evolution in redshift as 𝜂(𝑧) = 1 + 𝜖 𝑧, meaning that if 𝜖 is measured to be zero, 𝜂(𝑧) = 1 and we find no violation of the DDR. This parameterisation is motivated by the simple fact that we expect the DDR, if violated, to deviate only slightly from unity, as indicated by current constraints on 𝜂(𝑧) (Zhou et al 2020;Holanda & da Silva 2020;Xu & Huang 2020;Holanda et al 2016Holanda et al , 2017Rana et al 2017). We present the constraints on 𝐻 0 and 𝜖 obtained with our pipeline in Figure 2.…”

Section: The Gpmc Analysismentioning

confidence: 99%

The resilience of the Etherington-Hubble relation

Renzi,

Hogg,

Giarè

2021

Preprint

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The Etherington reciprocity theorem, or distance duality relation (DDR), relates the mutual scaling of cosmic distances in any metric theory of gravity where photons are massless and propagate on null geodesics. In this paper, we make use of the DDR to build a consistency check based on its degeneracy with the Hubble constant, 𝐻 0 . We parameterise the DDR using the form 𝜂(𝑧) = 1 + 𝜖 𝑧, thus only allowing small deviations from its standard value. We use a combination of late time observational data to provide the first joint constraints on the Hubble parameter and 𝜖 with percentage accuracy: 𝐻 0 = 68.6 ± 2.5 kms −1 Mpc −1 and 𝜖 = 0.001 +0.023 −0.026 . We build our consistency check using these constraints and compare them with the results obtained in extended cosmological models using cosmic microwave background data. We find that extensions to ΛCDM involving massive neutrinos and/or additional dark radiation are in perfect agreement with the DDR, while models with non-zero spatial curvature show a preference for DDR violation, i.e. 𝜖 ≠ 0 at the level of ∼ 1.5𝜎. Most importantly, we find a mild 2𝜎 discrepancy between the validity of the DDR and the latest publicly available Cepheid-calibrated SNIa constraint on 𝐻 0 . We discuss the potential consequences of this for both the Etherington reciprocity theorem and the 𝐻 0 tension.

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New tests of the cosmic distance duality relation with the baryon acoustic oscillation and type Ia supernovae

Cited by 13 publications

References 39 publications

A look at the Hubble speed from first principles

A look at the Hubble speed from first principles

Gravitational lens time-delay as a probe of a possible time variation of the fine-structure constant

The resilience of the Etherington-Hubble relation

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