Tomographic local 2D analyses of the WISExSuperCOSMOS all-sky galaxy catalogue

Abstract

The recent progress in obtaining larger and deeper galaxy catalogues is of fundamental importance for cosmological studies, especially to robustly measure the large scale density fluctuations in the Universe. The present work uses the Minkowski Functionals (MF) to probe the galaxy density field from the WISExSuperCOSMOS (WSC) all-sky catalogue by performing tomographic local analyses in five redshift shells (of thickness $\delta z=0.05$) in the total range of $0.10<z<0.35$. Here, for the first time, the MF are applied to 2D projections of the galaxy number count (GNC) fields with the purpose of looking for regions in the WSC catalogue with unexpected features compared to $\Lambda$CDM mock realisations. Our methodology reveals 1 - 3 regions of the GNC maps in each redshift shell with an uncommon behaviour (extreme regions), i.e., $p$-value $<$ 1.4\%. Indeed, the resulting MF curves show signatures that suggest the uncommon behaviour to be associated with the presence of over- or under-densities there, but contamination due to residual foregrounds is not discarded. Additionally, even though our analyses indicate a good agreement among data and simulations, we identify 1 highly extreme region, seemingly associated to a large clustered distribution of galaxies. Our results confirm the usefulness of the MF to analyse GNC maps from photometric galaxy datasets.

arXiv comment14 pages, 13 figures, accepted for publication in MNRAS

References in corpus (25)

• HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
• Stable clustering, the halo model and nonlinear cosmological power spectra
• Cosmology and Fundamental Physics with the Euclid Satellite
• The linear power spectrum of observed source number counts
• Improving lognormal models for cosmological fields
• J-PAS: The Javalambre-Physics of the Accelerated Universe Astrophysical Survey
• Probing Cosmology with Weak Lensing Peak Counts
• Primordial Non-Gaussianity and Analytical Formula for Minkowski Functionals of the Cosmic Microwave Background and Large-scale Structure
• Probing Cosmology with Weak Lensing Minkowski Functionals
• Emulating the CFHTLenS Weak Lensing data: Cosmological Constraints from moments and Minkowski functionals
• Cosmological Information in Weak Lensing Peaks
• Non-Gaussian statistics of critical sets in 2 and 3D: Peaks, voids, saddles, genus and skeleton
• Non Gaussianity and Minkowski Functionals: forecasts for Planck
• Statistical and Systematic Errors in Measurement of Weak-Lensing Minkowski Functionals: Application to Canada-France-Hawaii Lensing Survey
• Limits on Second-Order Non-Gaussianity from Minkowski Functionals of WMAP Data
• The SuperCOSMOS all-sky galaxy catalogue
• Using the topology of large-scale structure in the WiggleZ Dark Energy Survey as a cosmological standard ruler
• The imprint of $f(R)$ gravity on weak gravitational lensing II : Information content in cosmic shear statistics
• Temperature Fluctuations of the Cosmic Microwave Background Radiation: A Case of Nonextensivity?
• New probe of departures from general relativity using Minkowski functionals
• Is there evidence for anomalous dipole anisotropy in the large-scale structure?
• Multi-scale morphology of the galaxy distribution
• Local analyses of Planck maps with Minkowski Functionals
• Mapping the large-angle deviation from Gaussianity in simulated CMB maps
• Geometry and growth contributions to cosmic shear observables

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