The Hubble constant from eight time-delay galaxy lenses

Denzel, Philipp; Coles, Jonathan P.; Saha, Prasenjit; Williams, Liliya L. R.

doi:10.1093/mnras/staa3603

Cited by 56 publications

(26 citation statements)

References 114 publications

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“…Furthermore, 10 Other local expansion rate H 0 measurements result in slightly lower central values with slightly larger error bars (Rigault et al 2015;Zhang et al 2017;Dhawan et al 2018;Fernández Arenas et al 2018;Breuval et al 2020;Efstathiou 2020;Khetan et al 2021;Rameez & Sarkar 2021;Freedman 2021). Our H 0 estimates are consistent with earlier median statistics determinations (Gott et al 2001;Calabrese et al 2012) as well as with other recent H 0 measurements (Chen et al 2017;DES Collaboration 2018;Gómez-Valent & Amendola 2018;Planck Collaboration 2020;Domínguez et al 2019;Cuceu et al 2019;Zeng & Yan 2019;Schöneberg et al 2019;Blum et al 2020;Lyu et al 2020;Philcox et al 2020;Birrer et al 2020;Denzel et al 2021;Pogosian et al 2020;Boruah et al 2021;Kim et al 2020…”

Section: Model Comparisonsupporting

confidence: 92%

Cosmological constraints from H ii starburst galaxy apparent magnitude and other cosmological measurements

Cao

Ryan

Ratra

2020

Monthly Notices of the Royal Astronomical Society

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We use HII starburst galaxy apparent magnitude measurements to constrain cosmological parameters in six cosmological models. A joint analysis of HII galaxy, quasar angular size, baryon acoustic oscillations peak length scale, and Hubble parameter measurements result in relatively model-independent and restrictive estimates of the current values of the non-relativistic matter density parameter $\Omega _{\rm m_0}$ and the Hubble constant H0. These estimates favor a 2.0σ to 3.4σ (depending on cosmological model) lower H0 than what is measured from the local expansion rate. The combined data are consistent with dark energy being a cosmological constant and with flat spatial hypersurfaces, but do not strongly rule out mild dark energy dynamics or slightly non-flat spatial geometries.

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Section: Model Comparisonsupporting

confidence: 92%

Cosmological constraints from H ii starburst galaxy apparent magnitude and other cosmological measurements

Cao

Ryan

Ratra

2020

Monthly Notices of the Royal Astronomical Society

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“…unable to discriminate between the two measurements now, but it is expected to be able to resolve the Hubble tension at 3-5σ in the future [114] with the use of kinematic information to constrain the mass profiles. Another time-delay strong lensing measurement of the Hubble constant has been obtained analysing 8 strong lensing systems in [115], and is equal to H 0 = 71.8 +3.9 −3.3 km s −1 Mpc −1 at 68% CL. An alternative use of lensing is to observe time delays of SN images behind a combination of a cluster lens and Galaxy lens.…”

Section: (Astrophysical) Model-dependentmentioning

confidence: 99%

In the realm of the Hubble tension—a review of solutions ^*

Valentino

Mena²,

Pan³

et al. 2021

Class. Quantum Grav.

1,426

760

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The simplest ΛCDM model provides a good fit to a large span of cosmological data but harbors large areas of phenomenology and ignorance. With the improvement of the number and the accuracy of observations, discrepancies among key cosmological parameters of the model have emerged. The most statistically significant tension is the 4σ to 6σ disagreement between predictions of the Hubble constant, H 0, made by the early time probes in concert with the ‘vanilla’ ΛCDM cosmological model, and a number of late time, model-independent determinations of H 0 from local measurements of distances and redshifts. The high precision and consistency of the data at both ends present strong challenges to the possible solution space and demands a hypothesis with enough rigor to explain multiple observations—whether these invoke new physics, unexpected large-scale structures or multiple, unrelated errors. A thorough review of the problem including a discussion of recent Hubble constant estimates and a summary of the proposed theoretical solutions is presented here. We include more than 1000 references, indicating that the interest in this area has grown considerably just during the last few years. We classify the many proposals to resolve the tension in these categories: early dark energy, late dark energy, dark energy models with 6 degrees of freedom and their extensions, models with extra relativistic degrees of freedom, models with extra interactions, unified cosmologies, modified gravity, inflationary models, modified recombination history, physics of the critical phenomena, and alternative proposals. Some are formally successful, improving the fit to the data in light of their additional degrees of freedom, restoring agreement within 1–2σ between Planck 2018, using the cosmic microwave background power spectra data, baryon acoustic oscillations, Pantheon SN data, and R20, the latest SH0ES Team Riess, et al (2021 Astrophys. J. 908 L6) measurement of the Hubble constant (H 0 = 73.2 ± 1.3 km s−1 Mpc−1 at 68% confidence level). However, there are many more unsuccessful models which leave the discrepancy well above the 3σ disagreement level. In many cases, reduced tension comes not simply from a change in the value of H 0 but also due to an increase in its uncertainty due to degeneracy with additional physics, complicating the picture and pointing to the need for additional probes. While no specific proposal makes a strong case for being highly likely or far better than all others, solutions involving early or dynamical dark energy, neutrino interactions, interacting cosmologies, primordial magnetic fields, and modified gravity provide the best options until a better alternative comes along.

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“…We now compare our models to other published results: the free-form glass models presented in Denzel et al (2021), and the singular power-law elliptical mass distribution (SPEMD) parametric models presented in H0LiCOW XII (Rusu et al 2020). 2 The SPEMD mass distribution is not explicitly plotted in that paper, but we reconstruct it using the parameters in their Table 1.…”

Section: Comparison With Other Published Modelsmentioning

confidence: 86%

“…Mörtsell et al (2020) found that in iPTF16geu the extended ring did not help in modeling, while Williams & Zegeye (2020) found that some mass models did differ in their predicted rings, if sufficient resolution and high S/N were available. Denzel et al (2021) used a different method to incorporate extended ring information. After generating 1000 individual glass models, they selected a subset that reproduced the extended rings reasonably well.…”

Section: Constraints From Extended Ringsmentioning

confidence: 99%

Bridging the Gap Between Simply Parametrized and Free-Form Pixelated Models of Galaxy Lenses: The Case of WFI 2033-4723 Quad

Barrera¹,

Williams²,

Coles³

et al. 2021

TheOJA

Self Cite

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We study the radial and azimuthal mass distribution of the lensing galaxy in WFI 2033-4723. Mindful of the fact that modeling results depend on modeling assumptions, we examine two very different recent models: simply parametrized (SP) models from the H0LiCOW collaboration, and pixelated free-form (FF) glass models. In addition, we fit our own models which are a compromise between the astrophysical grounding of SP, and the flexibility of FF approaches. Our models consist of two offset parametric mass components, and generate many solutions, all fitting the quasar point image data. Among other results, we show that to reproduce point image properties the lensing mass must be lopsided, but the origin of this asymmetry can reside in the main lens plane or along the line of sight. We also show that there is a degeneracy between the slope of the density profile and the magnitude of external shear, and that the models from various modeling approaches are connected not by the mass sheet degeneracy, but by a more generalized transformation. Finally, we discuss interpretation degeneracy which afflicts all mass modeling: inability to correctly assign mass to the main lensing galaxy vs. nearby galaxies or line of sight structures. While this may not be a problem for the determination of H 0 , interpretation degeneracy may become a major issue for the detailed study of galaxy structure.

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The Hubble constant from eight time-delay galaxy lenses

Cited by 56 publications

References 114 publications

Cosmological constraints from H ii starburst galaxy apparent magnitude and other cosmological measurements

Cosmological constraints from H ii starburst galaxy apparent magnitude and other cosmological measurements

In the realm of the Hubble tension—a review of solutions ^*

Bridging the Gap Between Simply Parametrized and Free-Form Pixelated Models of Galaxy Lenses: The Case of WFI 2033-4723 Quad

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The Hubble constant from eight time-delay galaxy lenses

Cited by 56 publications

References 114 publications

Cosmological constraints from H ii starburst galaxy apparent magnitude and other cosmological measurements

Cosmological constraints from H ii starburst galaxy apparent magnitude and other cosmological measurements

In the realm of the Hubble tension—a review of solutions *

Bridging the Gap Between Simply Parametrized and Free-Form Pixelated Models of Galaxy Lenses: The Case of WFI 2033-4723 Quad

Contact Info

Product

Resources

About

In the realm of the Hubble tension—a review of solutions ^*