To H0 or not to H0?

@inproceedings{Efstathiou2021ToHO,
  title={To H0 or not to H0?},
  author={George P. Efstathiou},
  year={2021}
}
This paper investigates whether changes to late time physics can resolve the ‘Hubble tension’. It is argued that many of the claims in the literature favouring such solutions are caused by a misunderstanding of how distance ladder measurements actually work and, in particular, by the inappropriate use of a distance ladder H0 prior. A dynamics-free inverse distance ladder shows that changes to late time physics are strongly constrained observationally and cannot resolve the discrepancy between… 

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References

SHOWING 1-10 OF 38 REFERENCES

On the use of the local prior on the absolute magnitude of Type Ia supernovae in cosmological inference

A dark-energy which behaves as the cosmological constant until a sudden phantom transition at very-low redshift ($z 4$\sigma$ disagreement between the local and high-redshift determinations of the

w−M phantom transition at zt<0.1 as a resolution of the Hubble tension

A rapid transition of the dark energy equation of state parameter $w$ at a transition redshift $z_t z_t$ to $w z_t$. Such a Late $w$ Phantom Transition ($LwPT$) avoids the discontinuity of $H(z)$

Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with ΛCDM

We present an expanded sample of 75 Milky Way Cepheids with Hubble Space Telescope (HST) photometry and Gaia EDR3 parallaxes, which we use to recalibrate the extragalactic distance ladder and refine

The baryon density of the Universe from an improved rate of deuterium burning.

Improved cross-sections of the deuterium burning D(p,γ)3He reaction lead to BBN estimates of the baryon density at the 1.6 percent level, in excellent agreement with a recent analysis of the cosmic microwave background.

The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: BAO and RSD measurements from anisotropic clustering analysis of the quasar sample in configuration space between redshift 0.8 and 2.2

We measure the anisotropic clustering of the quasar sample from Data Release 16 (DR16) of the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey (eBOSS). A sample of

Can late dark energy transitions raise the Hubble constant?

Late times dark energy transitions at redshifts $z \ll 0.1$ can raise the predicted value of the Hubble constant to the SH0ES value, $74.03\pm 1.42$ (km s$^{-1}$ Mpc$^{-1})$ or more, while providing

The evidence for a spatially flat Universe

We revisit the observational constraints on spatial curvature following recent claims that the Planck data favour a closed Universe. We use a new and statistically powerful Planck likelihood to show

Cosmological Model Insensitivity of Local H0 from the Cepheid Distance Ladder

The observed tension (∼9% difference) between the local distance ladder measurement of the Hubble constant, H0, and its value inferred from the cosmic microwave background could hint at new, exotic,

Hubble constant hunter’s guide

Measurements of the Hubble constant and, more generally, measurements of the expansion rate and distances over the interval $0lzl1$ appear to be inconsistent with the predictions of the standard

An Improved Distance to NGC 4258 and Its Implications for the Hubble Constant

NGC 4258 is a critical galaxy for establishing the extragalactic distance scale and estimating the Hubble constant ( ). Water masers in the nucleus of the galaxy orbit about its supermassive black