Distance priors from Planck final release

Chen, Lu; Huang, Qing-Guo; Wang, Ke

doi:10.1088/1475-7516/2019/02/028

Cited by 145 publications

(126 citation statements)

References 41 publications

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“…4 See Ref. [76] for a recent release from the Planck Collaboration and also Ref. [77] for a discussion on model dependence in CMB distance priors.…”

Section: Resultsmentioning

confidence: 99%

Measurements of H0 in modified gravity theories: The role of lensed quasars in the late-time Universe

D’Agostino

Nunes

2020

Phys. Rev. D

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In this work, we obtain measurements of the Hubble constant in the context of modified gravity theories. We set up our theoretical framework by considering viable cosmological fðRÞ and fðTÞ models, and we analyzed them through the use of geometrical datasets obtained in a model-independent way, namely, gravitationally lensed quasars with measured time delays, standard clocks from cosmic chronometers, and standard candles from the Pantheon Supernovae Ia sample. We find H 0 ¼ ð72.4 AE 1.4Þ km s −1 Mpc −1 and H 0 ¼ ð71.5 AE 1.3Þ km s −1 Mpc −1 for the fðRÞ and fðTÞ models, respectively. Our results represent 1.9% and 1.8% measurements of the Hubble constant, which are fully consistent with the local estimate of H 0 by the Hubble Space Telescope. We do not find significant departures from general relativity, as our study shows that the characteristic parameters of the extensions of gravity beyond general relativity are compatible with the ΛCDM cosmology. Moreover, within the standard cosmological framework, our full joint analysis suggests that it is possible to measure the dark energy equation of state parameter at 1.2% accuracy, although we find no statistical evidence for deviations from the cosmological constant case.

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“…4 See Ref. [76] for a recent release from the Planck Collaboration and also Ref. [77] for a discussion on model dependence in CMB distance priors.…”

Section: Resultsmentioning

confidence: 99%

Measurements of H0 in modified gravity theories: The role of lensed quasars in the late-time Universe

D’Agostino

Nunes

2020

Phys. Rev. D

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“…The datasets that we used in this work are included from background datasets and growth rate of perturbations from RSD observations. The background datasets used here are: the CMB distance prior from final Planck 2018 [51]; SnIa data from Pantheon sample [53]; some of the latest measurements from cosmic chronometers for H (z) [52]; measurements of D V (z) from WiggleZ [54], 6df Galaxy [55], MGS [56]; BAO measurements from BOSS DR12 [37]; Radial and transverse BAO measurements from Lyα-Forests SDSS DR12 [39]; Radial and transverse BAO measurements from quasar sample of BOSS DR14 [57]; measurements of the angular diameter distance from DES collaboration [58]; baryon density measurements derived from BBN [59]; local measurements on the Hubble constant H 0 [15]. The growth rate data used in our analysis are the f σ 8 data extracted from RSD data from 2dFGRS [60], WiggleZ [61], 6dFGRS [62], SDSS Main galaxy sample [63], 2MTF [64], BOSS DR12 [65], Fast Sound [66] and finally eBOSS DR14 observations [67].…”

Section: Resultsmentioning

confidence: 99%

A Bayesian comparison between $$\Lambda $$CDM and phenomenologically emergent dark energy models

et al. 2020

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In this work we examine the recently proposed phenomenological emergent dark energy (PEDE) model by [1], using the latest observational data in both expansion and perturbation levels. Applying the statistical Bayesian evidence as well as the AIC and BIC information criteria, we compare the PEDE model with the concordance CDM model in both flat and non-flat universes. We combine the observational datasets as (i) expansion data (except CMB), (ii) expansion data (including CMB) and (iii) expansion data jointed to the growth rate dataset. Our statistical results show that the flat-CDM model is still the best model. In the case of expansion data (including CMB), we observe that the flat-PEDE model is well consistent with observations as well as the concordance CDM universe. While in the cases of (i) and (iii), the PEDE models in both of the flat and non-flat geometries are not favored. In particular, we see that in the perturbation level the PEDE model can not fit the observations as equally as standard CDM cosmology. As the ability of the model, we show that the PEDE models can alleviate the tension of Hubble constant value appearing between the local observations and Planck inferred estimation in standard cosmology.

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“…Therefore, for a sample of lensed GW systems with their source redshifts satisfying the distribution shown in Figure 1, we pick each system one by one and then individually determine its lens redshift by considering z s − z l curve presented in Figure 2. In order to investigate the complementarity of strongly lensed GW systems to already existing popular probes on constraining dark energy equation of state, we include the latest Planck 2018 CMB observations (Planck Collaboration 2018; Chen et al 2018) and SNe Ia from the upcoming DES Hybrid 10-field Survey (Table 14 of For CMB data, we use the information about the heights of the peaks of CMB temperature spectrum along the lineof-sight, i.e. the shift parameter R. For SNe Ia, the mock distance modulus-redshift data given in Bernstein et al (2012) is used.…”

Section: Simulation and Resultsmentioning

confidence: 99%

Complementary constraints on dark energy equation of state from strongly lensed gravitational wave

Liu

Zhu

2019

Monthly Notices of the Royal Astronomical Society

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It has been shown that time delay of strong gravitational lensing is not only an effective cosmological probe to constrain the Hubble constant, the matter density and the curvature of the universe but also useful for breaking the degeneracy of the dark energy equation of state and thus provide complementarity with other popular probes, such as type Ia supernovae, baryon acoustic oscillations, and cosmic microwave background radiation. Interestingly, compared to traditional strong lensing systems where quasars act as sources, strongly lensed gravitational waves (GWs) from compact binary coalescence and their electromagnetic (EM) counterparts systems have been recently proposed to be more powerful for studying cosmology since GWs and their EM counterparts are transients. Short durations of GWs and their EM counterparts are very advantageous to time delay measurement and lens profile modeling. Here, in the framework of Chevalier-Polarski-Linder (CPL) parametrization, we investigate improvement of constraining power on dark energy equation of state due to including time delay measurements of strong lensed GW systems. It is suggested that, on the basis of the third generation ground-based detector, e.g. Einstein Telescope, adding time delay of only 30 strong lensed GW systems to type Ia supernovae and cosmic microwave background radiation can improve the dark energy figure of merit by a factor 2. For the traditional standard siren method where the uncertainties of luminosity distances of GWs are ∼ 10%, a few × 10 4 events are expected to present similar constraints. In the precision cosmology era, this progress is of great significance for studying the nature of dark energy.

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Distance priors from Planck final release

Cited by 145 publications

References 41 publications

Measurements of H0 in modified gravity theories: The role of lensed quasars in the late-time Universe

Measurements of H0 in modified gravity theories: The role of lensed quasars in the late-time Universe

A Bayesian comparison between $$\Lambda $$CDM and phenomenologically emergent dark energy models

Complementary constraints on dark energy equation of state from strongly lensed gravitational wave

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