2020
DOI: 10.1093/mnras/staa770
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A new method to build the (inverse) distance ladder

Abstract: The cosmic distance ladder is the succession of techniques by which it is possible to determine distances to astronomical objects. Here, we present a new method to build the cosmic distance ladder, going from local astrophysical measurements to the CMB. Instead of relying on cosmography in order to model the luminosity-distance relation and calibrate supernovae with BAO, we exploit the distance-duality relation d L = (1 + z) 2 d A -valid if photon number is conserved and gravity is described by a metric theory… Show more

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Cited by 87 publications
(64 citation statements)
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References 48 publications
(78 reference statements)
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“…This introduces correlations between M B and the properties of dark energy, which can explain why our cosmology-independent determination of q 0 differs from the constraint q M18 0 = −0.37 ± 0.15 obtained in [39]. Finally, a low local value of q 0 ≈ −1 was also obtained in [40], where the cosmic ladder was extended to BAO and CMB observations using the distance-duality relation instead of a high-redshift cosmographic expansion.…”
Section: Discussionmentioning
confidence: 55%
“…This introduces correlations between M B and the properties of dark energy, which can explain why our cosmology-independent determination of q 0 differs from the constraint q M18 0 = −0.37 ± 0.15 obtained in [39]. Finally, a low local value of q 0 ≈ −1 was also obtained in [40], where the cosmic ladder was extended to BAO and CMB observations using the distance-duality relation instead of a high-redshift cosmographic expansion.…”
Section: Discussionmentioning
confidence: 55%
“…In view of some recent works [83,84] it is worth to add a further comment on the "statistical" role played by the constant μ 0 in our analysis. In fact, it is well known that is contains both the Hubble constant and the zero point absolute magnitude M B , and that the uncertainty on the latter reflects into an additional (i.e.…”
Section: Type Ia Supernovaementioning
confidence: 97%
“…Assuming that such information is actually included in the SNeIa data made available for cosmological purposes, authors from [83] point out that marginalization over H 0 and marginalization over M SN end in different results which should be taken into account in the context of the present Hubble tension debate, and that the latter marginalization should be preferred. In [83] the authors develop a way to include it; but we must point out that their total χ 2 always contain a prior on H 0 or on M SN .…”
Section: Type Ia Supernovaementioning
confidence: 99%
“…The Hubble tension may also be viewed as an inconsistency between the value of the standardized SnIa absolute magnitude M calibrated using Cepheids in the redshift range 0 < z < 0.01 (distance ladder calibration) and the corresponding M value calibrated using the recombination sound horizon (inverse distance ladder calibration) for 0.01 < z < z rec . Thus, a recently proposed class of approaches to the resolution of the Hubble tension involves a transition [22,23] of the standardized intrinsic SnIa luminosity L and absolute magnitude M at a redshift z t 0.01 from M = (−19.24 ± 0.037) mag for z < z t (as implied by Cepheid calibration) to M = (−19.4 ± 0.027) mag for z > z t (as implied by CMB calibration of the sound horizon at decoupling) [24]. Such a transition may occur due to a transition in the strength of the gravitational interactions G eff , which modifies the SnIa intrinsic luminosity L by changing the value of the Chandrasekhar mass.…”
Section: Introductionmentioning
confidence: 99%