Revisiting the NVSS number count dipole

Abstract

We present a realistic modeling of the dipole component of the projected sky distribution of NVSS radio galaxies. The modeling relies on mock catalogs generated within the context of $\Lambda$CDM cosmology, in the linear regime of structure formation. After removing the contribution from the solar motion, the mocks show that the remaining observed signal is mostly (70\%) due to structures within $z\lesssim 0.1$. The amplitude of the model signal depends on the bias factor $b$ of the NVSS mock galaxies. For sources with flux density, $S>15\mathrm{mJy}$, the bias recipe inferred from higher order moments is consistent with the observed dipole signal at $2.12\sigma$. Flux thresholds above $20\mathrm{mJy}$ yield a disagreement close to the $3\sigma$ level. A constant high bias, $b=3$ is needed to mitigate the tension to the $\sim 2.3\sigma$ level.

14 pages, 5 figures, 3 tables

References in corpus (14)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
• Three Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Polarization Analysis
• The imprints of primordial non-gaussianities on large-scale structure: scale dependent bias and abundance of virialized objects
• Radio sources in the 6dFGS: Local luminosity functions at 1.4 GHz for star-forming galaxies and radio-loud AGN
• 2MASS Photometric Redshift catalog: a comprehensive three-dimensional census of the whole sky
• Dipoles in the Sky
• The dust un-biased cosmic star formation history from the 20 cm VLA-COSMOS survey
• Excess Clustering on Large Scales in the MegaZ DR7 Photometric Redshift Survey
• The Atacama Cosmology Telescope: measuring radio galaxy bias through cross-correlation with lensing
• Galaxy and Mass Assembly (GAMA): The evolution of bias in the radio source population to z ~ 1.5
• The clustering of radio galaxies: biasing and evolution versus stellar mass
• Impact of local structure on the cosmic radio dipole
• Evolution in the bias of faint radio sources to z ~ 2.2
• Comment on "Cosmic radio dipole from NVSS and WENSS"

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