Tracing the cosmic velocity field at z ~ 0.1 from galaxy luminosities in the SDSS DR7

Abstract

Spatial modulations in the distribution of observed luminosities (computed using redshifts) of ~ 5 $\times$ 10${}^5$ galaxies from the SDSS Data Release 7, probe the cosmic peculiar velocity field out to z ~ 0.1. Allowing for luminosity evolution, the r-band luminosity function, determined via a spline-based estimator, is well represented by a Schechter form with M${}^{\star }$(z) - 5log${}_{10}$h = -20.52 - 1.6(z - 0.1) $\pm$ 0.05 and ${\alpha }^{\star }$ = -1.1 $\pm$ 0.03. Bulk flows and higher velocity moments in two redshift bins, 0.02 < z < 0.07 and 0.07 < z < 0.22, agree with the predictions of the $\Lambda$CDM model, as obtained from mock galaxy catalogs designed to match the observations. Assuming a $\Lambda$CDM model, we estimate ${\sigma }_8$ $\approx$ 1.1 $\pm$ 0.4 for the amplitude of the linear matter power spectrum, where the low accuracy is due to the limited number of galaxies. While the low-z bin is robust against coherent photometric uncertainties, the bias of results from the second bin is consistent with the ~ 1% magnitude tilt reported by the SDSS collaboration. The systematics are expected to have a significantly lower impact in future datasets with larger sky coverage and better photometric calibration.

arXiv comment21 pages, 11 figures, accepted version

References in corpus (59)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• The Sloan Digital Sky Survey: Technical Summary
• The Seventh Data Release of the Sloan Digital Sky Survey
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• Baryonic Features in the Matter Transfer Function
• Spectroscopic Target Selection in the Sloan Digital Sky Survey: The Main Galaxy Sample
• Baryon Acoustic Oscillations in the Sloan Digital Sky Survey Data Release 7 Galaxy Sample
• The 3D power spectrum of galaxies from the SDSS
• The Cosmic Microwave Background Spectrum from the Full COBE/FIRAS Data Set
• K-corrections and filter transformations in the ultraviolet, optical, and near infrared
• A 3% Solution: Determination of the Hubble Constant with the Hubble Space Telescope and Wide Field Camera 3
• NYU-VAGC: a galaxy catalog based on new public surveys
• Analytic model for galaxy and dark matter clustering
• The Galaxy Luminosity Function and Luminosity Density at Redshift z=0.1
• Halo occupation numbers and galaxy bias
• The Halo Occupation Distribution: Towards an Empirical Determination of the Relation Between Galaxies and Mass
• The 2MASS Redshift Survey - Description and Data Release
• A measurement of the cosmological mass density from clustering in the 2dF Galaxy Redshift Survey
• A test of the nature of cosmic acceleration using galaxy redshift distortions
• The Luminosity Function of Galaxies in SDSS Commissioning Data
• The density and peculiar velocity fields of nearby galaxies
• Redshift-Space Distortions, Pairwise Velocities and Nonlinearities
• Estimating Fixed Frame Galaxy Magnitudes in the SDSS
• Estimating the Power Spectrum of the Cosmic Microwave Background
• A Catalog of Spectroscopically Confirmed White Dwarfs from the Sloan Digital Sky Survey Data Release 4
• How to measure CMB power spectra without losing information
• A measurement of large-scale peculiar velocities of clusters of galaxies: results and cosmological implications
• Environmental Dependence of Properties of Galaxies in the Sloan Digital Sky Survey
• Cosmic flows in the nearby universe from Type Ia Supernovae
• Analytical approximations of K-corrections in optical and near-infrared bands
• 2MASS Photometric Redshift catalog: a comprehensive three-dimensional census of the whole sky
• A new measurement of the bulk flow of X-ray luminous clusters of galaxies
• Using the kinematic Sunyaev-Zeldovich effect to determine the peculiar velocities of clusters of galaxies
• Cosmic Flows on 100 Mpc/h Scales: Standardized Minimum Variance Bulk Flow, Shear and Octupole Moments
• The SDSS DR6 Luminosity Functions of Galaxies
• Cosmic flow from 2MASS redshift survey: The origin of CMB dipole and implications for LCDM cosmology
• Streaming motions of galaxy clusters within 12000 km/s - V. The peculiar velocity field
• On the Prediction of Velocity Fields from Redshift Space Galaxy Samples
• The cosmological bulk flow: consistency with $\Lambda$CDM and $z\approx 0$ constraints on ${\sigma }_8$ and $\gamma$
• A Map of Dust Reddening to 4.5 kpc from Pan-STARRS1
• POTENT Reconstruction from Mark III Velocities
• Measuring cosmic bulk flows with Type Ia Supernovae from the Nearby Supernova Factory
• Cosmological Parameters from Pre-Planck CMB Measurements
• The Environmental Dependence of the Infrared Luminosity and Stellar Mass Functions
• Determining the Motion of the Local Group Using SN Ia Light Curve Shapes
• The Dependence of the Galaxy Luminosity Function on Large-Scale Environment
• Measuring the Galaxy Cluster Bulk Flow from WMAP data
• The velocity field of 2MRS Ks=11.75 galaxies: constraints on beta and bulk flow from the luminosity function
• First measurement of the bulk flow of nearby galaxies using the cosmic microwave background
• Bulk flows from galaxy luminosities: application to 2MASS redshift survey and forecast for next-generation datasets
• Current Status Of Velocity Field Surveys: A Consistency Check
• A dipole anisotropy of galaxy distribution: Does the CMB rest-frame exist in the local universe?
• Large-Scale Power Spectrum and Structures From the ENEAR galaxy Peculiar Velocity Catalog
• The Statistical Significance of the "Dark Flow"
• ACCESS: NIR Luminosity Function and Stellar Mass Function of Galaxies in the Shapley Supercluster Environment
• Detected fluctuations in SDSS LRG magnitudes: Bulk flow signature or systematic?
• A new method for the determination of the growth rate from galaxy redshift surveys
• The halo mass function conditioned on density from the Millennium Simulation: insights into missing baryons and galaxy mass functions
• A direct probe of cosmological power spectra of the peculiar velocity field and the gravitational lensing magnification from photometric redshift surveys

Cited by in corpus (17)

• Testing $\Lambda$CDM at the lowest redshifts with SN Ia and galaxy velocities
• Growth rate of cosmological perturbations at z ~ 0.1 from a new observational test
• The 6dF Galaxy Survey: Bulk Flows on $50-70h^{-1}$ Mpc scales
• Bayesian 3d velocity field reconstruction with VIRBIuS
• Testing Isotropy in the Local Universe
• No evidence for bulk velocity from type Ia supernovae
• Speed from light: growth rate and bulk flow at z ~ 0.1 from improved SDSS DR13 photometry
• The velocity field in MOND cosmology
• Detectability of Cosmic Dark Flow in the Type Ia Supernova Redshift-Distance Relation
• Cosmology with Peculiar Velocities: Observational Effects
• Uneven flows: On cosmic bulk flows, local observers, and gravity
• Biasing relation, environmental dependencies and estimation of the growth rate from star forming galaxies
• Mapping the Cosmic Web with the largest all-sky surveys
• Constraints on the birth of the universe and origin of cosmic dark flow
• Dynamics of The Tranquil Cosmic Web
• Large-scale peculiar velocities through the galaxy luminosity function at z ~ 0.1
• Probing cosmic velocity-density correlations with galaxy luminosity modulations