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No evidence for the cold spot in the NVSS radio survey

2010; Oxford University Press; Volume: 403; Issue: 1 Linguagem: Inglês

10.1111/j.1365-2966.2009.15732.x

1365-2966

Kendrick M. Smith, Dragan Huterer,

Galaxies: Formation, Evolution, Phenomena

We revisit recent claims that there is a "cold spot" in both number counts and brightness of radio sources in the NVSS survey, with location coincident with the previously detected cold spot in WMAP. Such matching cold spots would be difficult if not impossible to explain in the standard LCDM cosmological model. Contrary to the claim, we find no significant evidence for the radio cold spot, after including systematic effects in NVSS, and carefully accounting for the effect of a posteriori choices when assessing statistical significance.