Cosmic discordance: are Planck CMB and CFHTLenS weak lensing measurements out of tune?
Abstract
We examine the level of agreement between low-redshift weak lensing data and the cosmic microwave background using measurements from the Canada–France–Hawaii Telescope Lensing Survey (CFHTLenS) and Planck+Wilkinson Microwave Anisotropy Probe (WMAP) polarization. We perform an independent analysis of the CFHTLenS six bin tomography results of Heymans et al. We extend their systematics treatment and find the cosmological constraints to be relatively robust to the choice of non-linear modelling, extension to the intrinsic alignment model and inclusion of baryons. We find that when marginalized in the Ωm–σ8 plane, the 95 percent confidence contours of CFHTLenS and Planck+WMAP only just touch, but the discrepancy is less significant in the full six-dimensional parameter space of Λ cold dark matter (ΛCDM). Allowing a massive active neutrino or tensor modes does not significantly resolve the tension in the full n-dimensional parameter space. Our results differ from some in the literature because we use the full tomographic information in the weak lensing data and marginalize over systematics. We note that adding a sterile neutrino to ΛCDM brings the 2D marginalized contours into greater overlap, mainly due to the extra effective number of neutrino species, which we find to be 0.88 ± 0.43 (68 per cent) greatermore »
- Authors:
-
- Univ. of Manchester (United Kingdom). School of Physics and Astronomy, Jodrell Bank Center for Astrophysics
- Univ. of Manchester (United Kingdom). School of Physics and Astronomy, Jodrell Bank Center for Astrophysic
- Univ. of Pennsylvania, Philadelphia, PA (United States). Center for Particle Cosmology, Dept. of Physics and Astronomy
- Stanford Univ., Stanford, CA (United States). Kavli Inst. for Particle Astrophysics and Cosmology; SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE; National Science Foundation (NSF); European Research Council (ERC)
- OSTI Identifier:
- 1326997
- Report Number(s):
- SLAC-PUB-16719
Journal ID: ISSN 0035-8711
- Grant/Contract Number:
- AC02-76SF00515; SC0007901; PHYS-1066293
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Monthly Notices of the Royal Astronomical Society
- Additional Journal Information:
- Journal Volume: 451; Journal Issue: 3; Journal ID: ISSN 0035-8711
- Publisher:
- Royal Astronomical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; gravitational lensing: weak; cosmic background radiation; dark matter; dark energy; cosmology: observations; cosmological parameters
Citation Formats
MacCrann, Niall, Zuntz, Joe, Bridle, Sarah, Jain, Bhuvnesh, and Becker, M. R. Cosmic discordance: are Planck CMB and CFHTLenS weak lensing measurements out of tune?. United States: N. p., 2015.
Web. doi:10.1093/mnras/stv1154.
MacCrann, Niall, Zuntz, Joe, Bridle, Sarah, Jain, Bhuvnesh, & Becker, M. R. Cosmic discordance: are Planck CMB and CFHTLenS weak lensing measurements out of tune?. United States. https://doi.org/10.1093/mnras/stv1154
MacCrann, Niall, Zuntz, Joe, Bridle, Sarah, Jain, Bhuvnesh, and Becker, M. R. Wed .
"Cosmic discordance: are Planck CMB and CFHTLenS weak lensing measurements out of tune?". United States. https://doi.org/10.1093/mnras/stv1154. https://www.osti.gov/servlets/purl/1326997.
@article{osti_1326997,
title = {Cosmic discordance: are Planck CMB and CFHTLenS weak lensing measurements out of tune?},
author = {MacCrann, Niall and Zuntz, Joe and Bridle, Sarah and Jain, Bhuvnesh and Becker, M. R.},
abstractNote = {We examine the level of agreement between low-redshift weak lensing data and the cosmic microwave background using measurements from the Canada–France–Hawaii Telescope Lensing Survey (CFHTLenS) and Planck+Wilkinson Microwave Anisotropy Probe (WMAP) polarization. We perform an independent analysis of the CFHTLenS six bin tomography results of Heymans et al. We extend their systematics treatment and find the cosmological constraints to be relatively robust to the choice of non-linear modelling, extension to the intrinsic alignment model and inclusion of baryons. We find that when marginalized in the Ωm–σ8 plane, the 95 percent confidence contours of CFHTLenS and Planck+WMAP only just touch, but the discrepancy is less significant in the full six-dimensional parameter space of Λ cold dark matter (ΛCDM). Allowing a massive active neutrino or tensor modes does not significantly resolve the tension in the full n-dimensional parameter space. Our results differ from some in the literature because we use the full tomographic information in the weak lensing data and marginalize over systematics. We note that adding a sterile neutrino to ΛCDM brings the 2D marginalized contours into greater overlap, mainly due to the extra effective number of neutrino species, which we find to be 0.88 ± 0.43 (68 per cent) greater than standard on combining the data sets. We discuss why this is not a completely satisfactory resolution, leaving open the possibility of other new physics or observational systematics as contributing factors. We provide updated cosmology fitting functions for the CFHTLenS constraints and discuss the differences from ones used in the literature.},
doi = {10.1093/mnras/stv1154},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 3,
volume = 451,
place = {United States},
year = {Wed Jun 17 00:00:00 EDT 2015},
month = {Wed Jun 17 00:00:00 EDT 2015}
}
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journal, September 2017
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- The Astrophysical Journal, Vol. 847, Issue 1
Constraints on Cosmology and Baryonic Feedback with the Deep Lens Survey Using Galaxy–Galaxy and Galaxy–Mass Power Spectra
journal, January 2019
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- The Astrophysical Journal, Vol. 870, Issue 2
Cosmological Tests of Gravity with the Latest Observations
journal, January 2019
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- The Astrophysical Journal, Vol. 871, Issue 2
The Effect of Dark Matter–Dark Radiation Interactions on Halo Abundance: A Press–Schechter Approach
journal, March 2019
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- The Astrophysical Journal, Vol. 874, Issue 1
Planck 2015 results : XIII. Cosmological parameters
journal, September 2016
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Planck intermediate results : LI. Features in the cosmic microwave background temperature power spectrum and shifts in cosmological parameters
journal, November 2017
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- Astronomy & Astrophysics, Vol. 607
Relieving the tension between weak lensing and cosmic microwave background with interacting dark matter and dark energy models
journal, February 2018
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- Journal of Cosmology and Astroparticle Physics, Vol. 2018, Issue 02
The gravitational and lensing-ISW bispectrum of 21 cm radiation
journal, December 2018
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- Monthly Notices of the Royal Astronomical Society, Vol. 483, Issue 3
The skewed weak lensing likelihood: why biases arise, despite data and theory being sound
journal, April 2018
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- Monthly Notices of the Royal Astronomical Society, Vol. 477, Issue 4
Observational challenges for the standard FLRW model
conference, December 2017
- Buchert, Thomas; Coley, Alan A.; Kleinert, Hagen
- Proceedings of the MG14 Meeting on General Relativity, The Fourteenth Marcel Grossmann Meeting
Reannihilation of self-interacting dark matter
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- Binder, Tobias; Gustafsson, Michael; Kamada, Ayuki
- Deutsches Elektronen-Synchrotron, DESY, Hamburg
Gravitational Fluctuations as an Alternative to Inflation
journal, January 2019
- Hamber, Herbert
- Universe, Vol. 5, Issue 1
Planck 2015 results. XIII. Cosmological parameters
text, January 2015
- Collaboration, Planck; Ade, P. A. R.; Aghanim, N.
- arXiv
An accurate halo model for fitting non-linear cosmological power spectra and baryonic feedback models
text, January 2015
- Mead, Alexander; Peacock, John; Heymans, Catherine
- arXiv
CMB lensing tomography with the DES Science Verification galaxies
text, January 2015
- Giannantonio, T.; Fosalba, P.; Cawthon, R.
- arXiv
CFHTLenS revisited: assessing concordance with Planck including astrophysical systematics
text, January 2016
- Joudaki, Shahab; Blake, Chris; Heymans, Catherine
- arXiv
KiDS-450: Cosmological parameter constraints from tomographic weak gravitational lensing
text, January 2016
- Hildebrandt, H.; Viola, M.; Heymans, C.
- arXiv
Integrated approach to cosmology: Combining CMB, large-scale structure and weak lensing
text, January 2016
- Nicola, Andrina; Refregier, Alexandre; Amara, Adam
- arXiv
Cosmological Constraints on Interacting Light Particles
text, January 2017
- Brust, Christopher; Cui, Yanou; Sigurdson, Kris
- arXiv
KiDS+GAMA: Cosmology constraints from a joint analysis of cosmic shear, galaxy-galaxy lensing and angular clustering
text, January 2017
- van Uitert, Edo; Joachimi, Benjamin; Joudaki, Shahab
- arXiv
Dark energy two decades after: Observables, probes, consistency tests
text, January 2017
- Huterer, Dragan; Shafer, Daniel L.
- arXiv
Constraints on Cosmology and Baryonic Feedback with the Deep Lens Survey Using Galaxy-Galaxy and Galaxy-Mass Power Spectra
text, January 2018
- Yoon, Mijin; Jee, M. James; Tyson, J. Anthony
- arXiv
Gravitational Fluctuations as an Alternative to Inflation
text, January 2018
- Hamber, Herbert W.; Yu, Lu Heng Sunny
- arXiv
A Unified Analysis of Four Cosmic Shear Surveys
text, January 2018
- Chang, Chihway; Wang, Michael; Dodelson, Scott
- arXiv
The effect of dark matter-dark radiation interactions on halo abundance -- a Press-Schechter approach
text, January 2018
- Sameie, Omid; Benson, Andrew J.; Sales, Laura V.
- arXiv
Cosmic Shear: Inference from Forward Models
text, January 2019
- Taylor, Peter L.; Kitching, Thomas D.; Alsing, Justin
- arXiv
Looking for interactions in the cosmological dark sector
text, January 2019
- Benetti, Micol; Miranda, Welber; Borges, Humberto A.
- arXiv
Cosmological discordances III: more on measure properties, Large-Scale-Structure constraints, the Hubble constant and Planck
text, January 2019
- Garcia-Quintero, Cristhian; Ishak, Mustapha; Fox, Logan
- arXiv