The stacked ISW signal of rare superstructures in ΛCDM

Abstract

A detection of the stacked integrated Sachs-Wolfe (ISW) signal in the CMB of rare superstructures identified in the SDSS Luminous Red Galaxy catalogue has been reported at very high statistical significance. The magnitude of the observed signal has previously been argued to be more than 3 standard deviations larger than the theoretical ΛCDM expectation. However, this calculation was made in the linear approximation, and relied on assumptions that may potentially have caused the ΛCDM expectation to be underestimated. Here we update the theoretical model calculation and compare it with an analysis of ISW maps obtained from N-body simulations of a ΛCDM universe. The differences between model predictions and the map analyses are found to be small and cannot explain the discrepancy with observation, which remains at >3 s.d. significance. We discuss the cosmological significance of this anomaly and speculate on the potential of alternative models to explain it.

arXiv comment19 pages, 8 figures. Comments welcome. v2: minor changes to match version accepted for publication in JCAP

References in corpus (36)

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
• The Seventh Data Release of the Sloan Digital Sky Survey
• Efficient Computation of CMB anisotropies in closed FRW models
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
• The Sixth Data Release of the Sloan Digital Sky Survey
• Three Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Polarization Analysis
• ZOBOV: a parameter-free void-finding algorithm
• A correlation of the cosmic microwave sky with large scale structure
• Correlation of CMB with large-scale structure: I. ISW Tomography and Cosmological Implications
• An Imprint of Super-Structures on the Microwave Background due to the Integrated Sachs-Wolfe Effect
• Combined analysis of the integrated Sachs-Wolfe effect and cosmological implications
• Looking for $\Lambda$ with the Rees-Sciama Effect
• Detection of the ISW and SZ effects from the CMB-Galaxy correlation
• Cross-Correlation of the Cosmic Microwave Background with the 2MASS Galaxy Survey: Signatures of Dark Energy, Hot Gas, and Point Sources
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Dark Energy Induced Correlation with Radio Sources
• A high redshift detection of the integrated Sachs-Wolfe effect
• Cross-correlation of WMAP 3rd year and the SDSS DR4 galaxy survey: new evidence for Dark Energy
• Integrated Sachs-Wolfe effect in Cross-Correlation: The Observer's Manual
• Correlating the CMB with Luminous Red Galaxies : The Integrated Sachs-Wolfe Effect
• The significance of the integrated Sachs-Wolfe effect revisited
• Cross-correlation of 2MASS and WMAP3: Implications for the Integrated Sachs-Wolfe effect
• Constraints on large scale inhomogeneities from WMAP-5 and SDSS: confrontation with recent observations
• A reassessment of the evidence of the Integrated Sachs-Wolfe effect through the WMAP-NVSS correlation
• The integrated Sachs-Wolfe imprints of cosmic superstructures: a problem for ΛCDM
• Full-sky map of the ISW and Rees-Sciama effect from Gpc simulations
• Measuring the Integrated Sachs-Wolfe Effect
• A Map of the Integrated Sachs-Wolfe Signal from Luminous Red Galaxies
• ISW measurements with photometric redshift surveys: 2MASS results and future prospects
• On the signature of $z\sim 0.6$ superclusters and voids in the Integrated Sachs-Wolfe effect
• Cross-correlating WMAP5 with 1.5 million LRGs: a new test for the ISW effect
• Optimising large galaxy surveys for ISW detection
• Cross-correlation of WISE Galaxies with the Cosmic Microwave Background
• Absence of significant cross-correlation between WMAP and SDSS
• Evidence of Quasi-linear Super-Structures in the Cosmic Microwave Background and Galaxy Distribution
• Dark Energy Detected with Supervoids and Superclusters

Cited by in corpus (49)

• Challenges for $\Lambda$CDM: An update
• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• Voids in Modified Gravity: Excursion Set Predictions
• Planck 2013 results. XIX. The integrated Sachs-Wolfe effect
• Is there proof that backreaction of inhomogeneities is irrelevant in cosmology?
• Observational Challenges for the Standard FLRW Model
• Spherical collapse in Galileon gravity: fifth force solutions, halo mass function and halo bias
• A Possible Cold Imprint of Voids on the Microwave Background Radiation
• Detecting the integrated Sachs-Wolfe effect with stacked voids
• A detection of the integrated Sachs-Wolfe imprint of cosmic superstructures using a matched-filter approach
• A robust public catalogue of voids and superclusters in the SDSS Data Release 7 galaxy surveys
• More out of less: an excess integrated Sachs-Wolfe signal from supervoids mapped out by the Dark Energy Survey
• Seeing patterns in noise: Gigaparsec-scale `structures' that do not violate homogeneity
• A WISE measurement of the ISW effect
• The nature of voids: I. Watershed void finders and their connection with theoretical models
• Can a supervoid explain the Cold Spot?
• Testing cosmology with a catalogue of voids in the BOSS galaxy surveys
• Euclid: Cosmological forecasts from the void size function
• The nature of voids: II. Tracing underdensities with biased galaxies
• Imprint of DES super-structures on the Cosmic Microwave Background
• Self-similarity and universality of void density profiles in simulation and SDSS data
• Cosmic voids: a novel probe to shed light on our Universe
• Cosmology with matter diffusion
• Cosmic troublemakers: the Cold Spot, the Eridanus Supervoid, and the Great Walls
• The Jubilee ISW Project I: simulated ISW and weak lensing maps and initial power spectra results
• Integrated Sachs-Wolfe effect in massive bigravity
• The DES view of the Eridanus supervoid and the CMB Cold Spot
• Evidence for a high-z ISW signal from supervoids in the distribution of eBOSS quasars
• Evidence for an environment-dependent shift in the baryon acoustic oscillation peak
• The Gravitational Lensing Signatures of BOSS Voids in the Cosmic Microwave Background
• Testing the spherical evolution of cosmic voids
• Cold imprint of supervoids in the Cosmic Microwave Background re-considered with Planck and BOSS DR10
• The Integrated Sachs-Wolfe Signal from BOSS Super-Structures
• Violation of the FRW consistency condition as a signature of backreaction
• Large scale structure and ISW effect in decaying vacuum cosmology
• Gaussian Approximation of Peak Values in the Integrated Sachs-Wolfe Effect
• A common explanation of the Hubble tension and anomalous cold spots in the CMB
• Could multiple voids explain the Cosmic Microwave Background Cold Spot anomaly?
• CMB seen through random Swiss Cheese
• CMB Cold Spot in the Planck light
• The Integrated Sachs-Wolfe Effect in the Bulk Viscous Dark Energy Model
• The Scale of Homogeneity in the $R_h=ct$ Universe
• Universal void density profiles from simulation and SDSS
• The CMB lensing imprint of cosmic voids detected in the WISE-Pan-STARRS luminous red galaxy catalog
• Full sky Integrated Sachs-Wolfe maps for the MICE Grand Challenge lightcone simulation
• A spherical hydrodynamical model of cosmic voids in ΛCDM and beyond
• A CMB Gibbs sampler for localized secondary anisotropies
• Embedded Lensing Time Delays, the Fermat Potential, and the Integrated Sachs-Wolfe Effect
• Cosmology with Cosmic Voids