Using the filaments in the LCRS to test the LambdaCDM model

Abstract

It has recently been established that the filaments seen in the Las Campanas Redshift Survey (LCRS) are statistically significant at scales as large as 70 to 80 Mpc/h in the $-3^{\circ }$ slice, and 50 to 70 Mpc/h in the five other LCRS slices. The ability to produce such filamentary features is an important test of any model for structure formation. We have tested the LCDM model with a featureless, scale invariant primordial power spectrum by quantitatively comparing the filamentarity in simulated LCRS slices with the actual data. The filamentarity in an unbiased LCDM model, we find, is less than the LCRS. Introducing a bias b=1.15, the model is in rough consistency with the data, though in two of the slices the filamentarity falls below the data at a low level of statistical significance. The filamentarity is very sensitive to the bias parameter and a high value b=1.5, which enhances filamentarity at small scales and suppresses it at large scales, is ruled out. A bump in the power spectrum at k~0.05 Mpc/h is found to have no noticeable effect on the filamentarity.

arXiv comment16 pages, 3 figures; Minor Changes, Accepted to Apj

References in corpus (38)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Cosmological parameters from SDSS and WMAP
• The 2dF Galaxy Redshift Survey: Spectra and redshifts
• The 3D power spectrum of galaxies from the SDSS
• The First Data Release of the Sloan Digital Sky Survey
• The 2dF Galaxy Redshift Survey: The power spectrum and the matter content of the universe
• The 2dF Galaxy Redshift Survey: correlation functions, peculiar velocities and the matter density of the Universe
• Reconstructing the linear power spectrum of cosmological mass fluctuations
• The 2dF Galaxy Redshift Survey: The bias of galaxies and the density of the Universe
• Galaxy Clustering in Early SDSS Redshift Data
• The Las Campanas Redshift Survey
• Galaxy Formation and Large-Scale Bias
• Beyond genus statistics: a unifying approach to the morphology of cosmic structure
• The Bispectrum of IRAS Galaxies
• The Supercluster-Void Network I. The Supercluster Catalogue and Large-Scale Distribution
• Shapefinders: A new shape diagnostic for large scale structure
• A 120-Mpc Periodicity in the Three-Dimensional Distribution of Galaxy Superclusters
• Constraints on the Effects of Locally-biased Galaxy Formation
• The Power Spectrum of Galaxy Clustering in the Las Campanas Redshift Survey
• Mock 2dF and SDSS galaxy redshift surveys
• The 2dF Galaxy Redshift Survey: Final Data Release
• Morphology of the supercluster-void network in LCDM cosmology
• The Las Campanas Redshift Survey Galaxy-Galaxy Autocorrelation Function
• The 2D Power Spectrum of the Las Campanas Redshift Survey: Detection of Excess Power on 100 h^{-1} Mpc Scales
• Tree structure of the percolating Universe
• Clusters and Superclusters in the Sloan Digital Sky Survey
• Measuring the Geometry and Topology of Large Scale Structure using SURFGEN: Methodology and Preliminary Results
• Voids in the LCRS versus CDM Models
• Evidence for Filamentarity in the Las Campanas Redshift Survey
• Two-Dimensional Topology of the Sloan Digital Sky Survey
• PSCz Superclusters: Detection, Shapes & Cosmological Implications
• The Size of the Longest Filaments in the Universe
• Two Dimensional Topology of Large Scale Structure in the Las Campanas Redshift Survey
• Detection of Network Structure in the Las Campanas Redshift Survey
• Supercluster Properties as a Cosmological Probe
• Two-Dimensional Topology of the 2dF Galaxy Redshift Survey
• Topology and Geometry of the CfA2 Redshift Survey
• Topology of the Las Campanas Redshift Survey

Cited by in corpus (14)

• Multiscale Phenomenology of the Cosmic Web
• Simulating the physical properties of dark matter and gas inside the cosmic web
• An excursion set model of the cosmic web: The abundance of sheets, filaments and halos
• The Luminosity, Colour and Morphology dependence of galaxy filaments in the Sloan Digital Sky Survey Data Release Four
• Morphological Properties of Superclusters of Galaxies
• Exploring star formation using the filaments in the Sloan Digital Sky Survey Data Release Five (SDSS DR5)
• Superclustering with the Atacama Cosmology Telescope and Dark Energy Survey: I. Evidence for thermal energy anisotropy using oriented stacking
• Pulling out Threads from the Cosmic Tapestry: Defining Filaments of Galaxies
• The luminosity bias relation from filaments in the Sloan Digital Sky Survey Data Release Four
• Relating information entropy and mass variance to measure bias and non-Gaussianity
• Statistically significant length scale of filaments as a robust measure of galaxy distribution
• First Light and Reionization: A Conference Summary
• Exploring the Cosmic Web in the Sloan Digital Sky Survey Data Release Seven using the Local Dimension
• A three dimensional object point process for detection of cosmic filaments