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A look at the Hubble speed from first principles

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arxiv 2011.10559 v2 pith:UBC2XPPU submitted 2020-11-20 astro-ph.CO

Fabrizio Renzi , Alessandra Silvestri This is my paper
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keywords calibrationconstantcosmologicaldistancefirsthubblemodelprinciples
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abstract

We introduce a novel way of measuring $H_0$ from a combination of independent geometrical datasets, with no need of calibration nor of the choice of a cosmological model. We build on the {\it distance duality relation} which sets the ratio of the luminosity and angular diameter distance to a fixed scaling in redshift for any metric theory of gravity with standard photon propagation and constitutes a founding block of any theory describing our Universe. Our method provides the unprecedented possibility of determining $H_0$ from first principles, unleashing the measurement of this fundamental constant from calibration and assumption of a cosmological model. We find $H_0=69.5 \pm 1.7$ km/s/Mpc at $68\%$ C.L. showing that the Hubble constant can be constrained at percent level with minimal assumptions.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Quasar cosmology II: joint analyses with Cosmic Microwave Background

    astro-ph.CO 2025-06 conditional novelty 6.0 of 10

    Quasar, supernova, BAO, DES, and CMB data are jointly compatible only in an interacting dark-energy model, not in Lambda-CDM, wCDM, or CPL.

  2. Cosmo-Learn: code for learning cosmology using different methods and mock data

    astro-ph.CO 2025-08 conditional novelty 5.0 of 10

    An open-source toolkit that simulates late-universe cosmological observations and benchmarks MCMC, genetic algorithms, Gaussian processes, Bayesian ridge regression, and neural networks in one pipeline.

  3. A Joint Analysis of Strong Lensing and Type Ia Supernovae to Determine the Hubble Constant

    astro-ph.CO 2025-05 conditional novelty 5.0 of 10

    A model-independent combination of strong lensing and supernova data gives H0 = 70.55 ± 7.44 km/s/Mpc, consistent with both Planck and SH0ES within 1sigma.

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