PSCz Superclusters: Detection, Shapes & Cosmological Implications

Abstract

We study the possibility of correctly identifying superclusters, from the smooth galaxy density field of the PSCz redshift catalogue, and of recovering their true shapes in the presence of a bias introduced by the coupling between the selection function and the constant radius smoothing. Using simulations we quantify such systematic biases in the smoothed PSCz density field and after applying the necessary corrections we study the PSCz supercluster multiplicity and morphologies using a differential geometry definition of shape. Our results strongly suggest that filamentariness is the dominant morphological feature of PSCz superclusters. Finally, we compare our results with those expected in three different cosmological models and find that the LCDM model performs better than Omega_m=1 CDM models.

9 pages, 9 figures, submitted to MNRAS

References in corpus (2)

• The PSCz Catalogue
• The IRAS PSCz Dipole

Cited by in corpus (43)

• The Multiscale Morphology Filter: Identifying and Extracting Spatial Patterns in the Galaxy Distribution
• The Cosmic Web: Geometric Analysis
• Superclusters of galaxies from the 2dF redshift survey. I. The catalogue
• Morphological fluctuations of large-scale structure: the PSCz survey
• The Challenge of the Largest Structures in the Universe to Cosmology
• The Size and Shape of Local Voids
• The Sloan Great Wall. Morphology and galaxy content
• Clusters and Superclusters in the Sloan Digital Sky Survey
• Measuring the Geometry and Topology of Large Scale Structure using SURFGEN: Methodology and Preliminary Results
• Superclusters of galaxies from the 2dF redshift survey. II. Comparison with simulations
• Future Evolution of Bound Superclusters in an Accelerating Universe
• Luminous superclusters: remnants from inflation
• The Shape-Alignment relation in $\Lambda$CDM Cosmic Structures
• Future virialized structures: An analysis of superstructures in SDSS-DR7
• The Luminosity, Colour and Morphology dependence of galaxy filaments in the Sloan Digital Sky Survey Data Release Four
• Toward understanding rich superclusters
• Morphological Properties of Superclusters of Galaxies
• The Shape of Poor Groups of Galaxies
• Multiscale cosmic web detachments, connectivity, and preprocessing in the supercluster SClA2142 cocoon
• Clusters and Superclusters in the Las Campanas Redshift Survey
• Shape Statistics of Sloan Digital Survey superclusters
• Las Campanas Loose Groups in the Supercluster-Void Network
• Exploring star formation using the filaments in the Sloan Digital Sky Survey Data Release Five (SDSS DR5)
• SDSS DR7 superclusters. Principal component analysis
• Morphological & Dynamical Properties of low redshift 2dFGRS Groups
• The Corona Borealis supercluster: connectivity, collapse, and evolution
• Dynamical state of superclusters of galaxies: do superclusters expand or have they started to collapse?
• The size of the longest filament in the Luminous Red Galaxy distribution
• Using the filaments in the LCRS to test the LambdaCDM model
• Superclustering with the Atacama Cosmology Telescope and Dark Energy Survey: I. Evidence for thermal energy anisotropy using oriented stacking
• The Aquarius Superclusters - I. Identification of Clusters and Superclusters
• Superclusters with thermal SZ effect surveys
• The Local Dimension: a method to quantify the Cosmic Web
• The Cosmic Large-Scale Structure in X-rays (CLASSIX) cluster survey IV: Superclusters in the local Universe at z <= 0.03
• Dark Sector Coupling Bends the Superclusters
• Alpha Shape Topology of the Cosmic Web
• Statistically significant length scale of filaments as a robust measure of galaxy distribution
• Massive Gravity wrapped in the Cosmic Web
• Quasi-spherical superclusters
• Cosmological Implications of the PSCz PDF and its Moments
• The richest superclusters. I. Morphology
• Detecting and analysing the topology of the cosmic web with spatial clustering algorithms I: Methods
• A Fast and Simple Algorithm for Detecting Large Scale Structures