Revisiting the nvss number count dipole

Prabhakar Tiwari, Adi Nusser

Research output: Contribution to journalArticlepeer-review

56 Scopus citations


We present a realistic modeling of the dipole component of the 0projected sky distribution of NVSS radio galaxies. The modeling relies on mock catalogs generated within the context of ?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 . 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 mJy, the bias recipe inferred from higher order moments is consistent with the observed dipole signal at 2:12s. Flux thresholds above 20 mJy yield a disagreement close to the 3s level. A constant high bias, b = 3 is needed to mitigate the tension to the ∼ 2:3s level.

Original languageEnglish
Article number062
JournalJournal of Cosmology and Astroparticle Physics
Issue number3
StatePublished - 2016
Externally publishedYes


  • Cosmological simulations
  • Galaxy clustering
  • High redshift galaxies


Dive into the research topics of 'Revisiting the nvss number count dipole'. Together they form a unique fingerprint.

Cite this