Testing for a large local void by investigating the Near-Infrared Galaxy Luminosity Function

Abstract

Recent cosmological modeling efforts have shown that a local underdensity on scales of a few hundred Mpc (out to z ~ 0.1), could produce the apparent acceleration of the expansion of the universe observed via type Ia supernovae. Several studies of galaxy counts in the near-infrared (NIR) have found that the local universe appears under-dense by ~25-50% compared with regions a few hundred Mpc distant. Galaxy counts at low redshifts sample primarily L ~ L* galaxies. Thus, if the local universe is under-dense, then the normalization of the NIR galaxy luminosity function (LF) at z>0.1 should be higher than that measured for z<0.1. Here we present a highly complete (> 90%) spectroscopic sample of 1436 galaxies selected in the H-band to study the normalization of the NIR LF at 0.1<z<0.3 and address the question of whether or not we reside in a large local underdensity. We find that for the combination of our six fields, the product phi* L* at 0.1 < z < 0.3 is ~ 30% higher than that measured at lower redshifts. While our statistical errors in this measurement are on the ~10% level, we find the systematics due to cosmic variance may be larger still. We investigate the effects of cosmic variance on our measurement using the COSMOS cone mock catalogs from the Millennium simulation and recent empirical estimates. We find that our survey is subject to systematic uncertainties due to cosmic variance at the 15% level ($1 sigma), representing an improvement by a factor of ~ 2 over previous studies in this redshift range. We conclude that observations cannot yet rule out the possibility that the local universe is under-dense at z<0.1.

Accepted for publication in ApJ

References in corpus (26)

• The UKIRT Infrared Deep Sky Survey (UKIDSS)
• The Cosmic Evolution Survey (COSMOS) -- Overview
• The hierarchical formation of the brightest cluster galaxies
• The All-wavelength Extended Groth Strip International Survey (AEGIS) Data Sets
• Evidence for TP-AGB stars in high redshift galaxies, and their effect on deriving stellar population parameters
• The high redshift galaxy population in hierarchical galaxy formation models
• GALEV evolutionary synthesis models - I. Code, input physics and web-interface
• Large Structures and Galaxy Evolution in COSMOS at z < 1.1
• Local Voids as the Origin of Large-angle Cosmic Microwave Background Anomalies I
• Near-Infrared and Optical Luminosity Functions from the 6dF Galaxy Survey
• Can we avoid dark energy?
• Precision cosmology defeats void models for acceleration
• Mapping Luminosity-Redshift Relationship to LTB Cosmology
• Local Void vs Dark Energy: Confrontation with WMAP and Type Ia Supernovae
• Deep Near-IR Surface Photometry of 57 Galaxies in the Local Sphere of Influence
• The radial BAO scale and Cosmic Shear, a new observable for Inhomogeneous Cosmologies
• The Resolved NIR Extragalactic Background
• The Resolved Near-Infrared Extragalactic Background
• The angular correlations of galaxies in the COSMOS field
• The OPTX Project I: The Flux and Redshift Catalogs for the CLANS, CLASXS, and CDF-N fields
• Observational constraints on the LLTB model
• Cosmic spherical void via coarse-graining and averaging non-spherical structures
• Local and non-local measures of acceleration in cosmology
• Luminosity and surface brightness distribution of K-band galaxies from the UKIDSS Large Area Survey
• Charm Production in DPMJET
• On the nature of the extragalactic number counts in the K-band

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• Cosmic variance of the local Hubble flow in large-scale cosmological simulations
• Cosmic troublemakers: the Cold Spot, the Eridanus Supervoid, and the Great Walls
• Exploring the evidence for a large local void with supernovae Ia data
• Testing Isotropy in the Local Universe
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• Evolution of the Major Merger Galaxy Pair Fraction at z < 1
• The galaxy luminosity function and the Local Hole
• Local Hole revisited: evidence for bulk motions and self-consistent outflow
• The Local Value of $H_0$ in an Inhomogeneous Universe
• Testing the Copernican Principle with Hubble Parameter
• VLA 1.4 GHz Catalogs of the Abell 370 and Abell 2390 Cluster Fields
• Search for a direction in the forest of Lyman-$\alpha$
• Relativistic cosmology number densities in void-Lemaitre-Tolman-Bondi models
• Cosmological model dependence of the galaxy luminosity function: far-infrared results in the Lemaitre-Tolman-Bondi model
• Distinguishing between inhomogeneous model and $\Lambda \text{CDM}$ model with the cosmic age method
• Galaxy Superclusters and Their Complexes in the Cosmic Web