Constraining a late time transition of $G_{\rm eff}$ using low-z galaxy survey data

Alestas, G.; Perivolaropoulos, L.; Tanidis, K.

doi:10.48550/arxiv.2201.05846

Cited by 11 publications

(13 citation statements)

References 32 publications

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“…Hints for such a transition in the values of dynamical parameters connected to the gravitational constant have recently been pointed out in Cepheid SnIa calibrator data [33,34], in Tully-Fisher data [35] and in solar system history data [36] which indicate an increase of the rate of impactors on the Moon and Earth surfaces by about a factor of 2-3 during the past 100Myrs which correspond to z < 0.008 [37][38][39][40][41][42][43]. Such a transition is also consistent with low redshift galaxy surveys data [44].…”

Section: Introductionsupporting

confidence: 72%

Gravitational transitions via the explicitly broken symmetron screening mechanism

Perivolaropoulos¹,

Skara²

2022

Preprint

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Section: Introductionsupporting

confidence: 72%

Gravitational transitions via the explicitly broken symmetron screening mechanism

Perivolaropoulos¹,

Skara²

2022

Preprint

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“…This tension suggests possible deviation from the standard ΛCDM cosmological model, inspiring people to explore the physical reasons behind this phenomenon. In particular, since the new data show greater tension, this issue has again aroused a lot of attention and research [10][11][12][13][14][15][16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Gaussian processes and effective field theory of $f(T)$ gravity under the $H_0$ tension

Ren,

Yan,

Zhao

et al. 2022

Preprint

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We consider the effective field theory formulation of torsional gravity in a cosmological framework to alter the background evolution. Then we use the latest H0 measurement from the SH0ES Team as well as observational Hubble data from cosmic chronometer (CC) and radial baryon acoustic oscillations (BAO) and we reconstruct the f (T ) form in a model-independent way by applying Gaussian processes. Since the special square-root term does not affect the evolution at the background level, we finally result to a family of functions that can produce the background evolution required by the data. Finally, performing a fitting using polynomial functions we find an analytic expression that may describe the cosmological evolution in great agreement with observations.

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“…To that end, introducing a non-minimal coupling places one in the Brans-Dicke/ f (R) gravity class [54,55] (see Table 1). However, evidence for evolution in the Newton's constant, and therefore G 4 (φ), is weak, and on the contrary, one has strong solar system [63] and BBN constraints [64] (see also [65][66][67] and [68][69][70] and references therein for an alternative view). On the minimal assumption that the coupling G 4 (φ) evolves linearly with cosmic time, while employing model agnostic techniques for the Quintessence sector, G 2 (φ, X) = X − V(φ), we show in section 3 that any increase in H 0 is expected to be negligible.…”

Section: Classmentioning

confidence: 99%

“…physically explain an abrupt jump in G, e. g. [68][69][70]105]. 10 See [108] for a potential explanation in f (R) gravity.…”

Section: Classmentioning

confidence: 99%

Is Local $H_0$ At Odds With Dark Energy EFT?

Lee,

Colgáin

et al. 2022

Preprint

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Local H 0 determinations currently fall in a window between H 0 ∼ 70 km/s/Mpc (TRGB) and H 0 ∼ 76 km/s/Mpc (Tully-Fisher). In contrast, BAO data calibrated in an early ΛCDM universe are largely consistent with Planck-ΛCDM, H 0 ∼ 67.5 km/s/Mpc. Employing a generic two parameter family of evolving equations of state (EoS) for dark energy (DE) w DE (z) and mock BAO data, we demonstrate that if i) w DE (z = 0) < −1 and ii) integrated DE density less than ΛCDM, then H 0 increases. EoS that violate these conditions at best lead to modest H 0 increases within 1σ. Tellingly, Quintessence and K-essence satisfy neither condition, whereas coupled Quintessence can only satisfy ii). Beyond these seminal DE Effective Field Theories (EFTs), we turn to explicit examples. Working model agnostically in an expansion in powers of redshift z, we show that Brans-Dicke/ f (R) and Kinetic Gravity Braiding models within the Horndeski class can lead to marginal and modest increases in H 0 , respectively. We confirm that as far as increasing H 0 is concerned, no DE EFT model can outperform the phenomenological two parameter family of the DE models. Evidently, the late universe may no longer be large enough to accommodate H 0 , BAO and DE described by EFT.

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Constraining a late time transition of $G_{\rm eff}$ using low-z galaxy survey data

Cited by 11 publications

References 32 publications

Gravitational transitions via the explicitly broken symmetron screening mechanism

Gravitational transitions via the explicitly broken symmetron screening mechanism

Gaussian processes and effective field theory of $f(T)$ gravity under the $H_0$ tension

Is Local $H_0$ At Odds With Dark Energy EFT?

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