Cosmic Discordance: Are Planck CMB and CFHTLenS weak lensing measurements out of tune?

By N. MacCrann, Joe Zuntz, Sarah Bridle, B. Jain, Matthew R. Becker. 2014

161 citations recorded by the source corpus.

We examine the level of agreement between low redshift weak lensing data and the CMB using measurements from the CFHTLenS and Planck+WMAP polarization. We perform an independent analysis of the CFHTLenS six bin tomography results of Heymans et al. (2013). We extend their systematics treatment and nd the cosmological constraints to be relatively robust to the choice of non-linear modeling, extension to the intrinsic alignment model and inclusion of baryons. We nd that when marginalised

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/105e800110dde2cbcba5621024fb4eb4a810245a

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Citations in the corpus

Planck intermediate results: LI. features in the cosmic microwave background temperature power spectrum and shifts in cosmological parameters (2016, unknown): “…from some other astrophysical data sets, and have thereby motivated discussion of extensions to the standard cosmological model (e.g. Verde et al. 2013; Marra et al. 2013; Efstathiou 2014; Wyman et al. 2014; Beutler et al. 2014; MacCrann et al. 2015; Seehars et al. 2016; Hildebrandt et al. 2016).”
Accurate halo-model matter power spectra with dark energy, massive neutrinos and modified gravitational forces (2016, methodology): “The sensitivity to non-linear scales makes weak lensing an ideal tool to probe the neutrino mass (e.g., Kitching et al. 2008; Ichiki et al. 2009) and limits have already been placed using CFHTLenS data by Battye & Moss (2014), MacCrann et al. (2015) and Harnois-Déraps et al. (2015b).”
CFHTLenS revisited: assessing concordance with Planck including astrophysical systematics (2016, methodology): “…with similar precision (also see Köhlinger et al. 2016, which use the same prescription as in Harnois-Déraps et al. 2015 but only marginalize over a single parameter and MacCrann et al. 2015 for a similar single-parameter marginalization approach based on the AGN case of the OWL simulations).”
KiDS-450: testing extensions to the standard cosmological model (2016, result): “…Survey (CFHTLenS; Heymans et al. 2012; Hildebrandt et al. 2012; Erben et al. 2013; Miller et al. 2013) were also found to exhibit a similar tension with Planck (e.g. Planck Collaboration XVI 2014; MacCrann et al. 2015; Köhlinger et al. 2016; Planck Collaboration XIII 2016b; Joudaki et al. 2017).”
Lensing is Low: Cosmology, Galaxy Formation, or New Physics? (2016, background): “…on the amplitude of low-redshift structure, both from lensing and from cluster abundances (e.g. Cacciato et al. 2009, 2013; Heymans et al. 2013; MacCrann et al. 2015; Giannantonio et al. 2016; Planck Collaboration XXIV 2016; Hildebrandt et al. 2017; Joudaki et al. 2017), that yield lower σ 8…”
KiDS-450: The tomographic weak lensing power spectrum and constraints on cosmological parameters (2017, background): “We remind the reader though to be cautious when quantifying tension between data sets based on parameter projections of multidimensional likelihoods (see appendix A in MacCrann et al. 2015).”
CMB-S4 Science Case, Reference Design, and Project Plan (2019, background): “These possibilities may also play a role in explaining the discrepancies observed in the Hubble constant H0 measurements [160, 161, 162, 163, 164], the amplitude of fluctuations σ8 [165, 166, 167, 168], and clustering on small scales [169, 127].”
Interacting dark sector and precision cosmology (2017, methodology): “) constraint from Planck SZ cluster counts ([2]), the full correlation functions measured by the CFHTLens weak lensing survey [1] (after using the updated version of HALOFIT [58] to treat the non-linearities of the MPS, see [13]), and the measurement of the halo power spectrum from the Luminous Red ”
KiDS+GAMA : cosmology constraints from a joint analysis of cosmic shear, galaxy-galaxy lensing, and angular clustering (2017, background): “Further investigation of this tension is warranted, because if it is real and not due to systematics, the implications would be far-reaching (see e.g. Battye & Moss 2014; MacCrann et al. 2015; Kitching et al. 2016; Joudaki et al. 2017b).”
KiDS-450: cosmological parameter constraints from tomographic weak gravitational lensing (2016, unknown): “…Survey (CFHTLenS;4 Heymans et al. 2012, 2013) are in tension with the CMB results from Planck (Planck Collaboration XIII 2016a) as described in MacCrann et al. (2015), yielding a lower amplitude of density fluctuations (usually parametrized by the root-mean-square (rms) fluctuations in…”
An accurate halo model for fitting non-linear cosmological power spectra and baryonic feedback models (2015, methodology): “MacCrann et al.(2015) reanalysed the CFHTLenS survey but adding a single parameter that governs the amplitude of AGN feedback, which was taken to be given by the ratio of power from theAGN to DMONLY simulations.”
Reducing the H0 and σ8 tensions with dark matter-neutrino interactions. (2017, background): “[30,39,40] that massive neutrinos could alleviate the tension between Planck and the weak lensing measurements from the CFHTLenS survey [41,42] and FIG.”