No evidence for the cold spot in the NVSS radio survey

作者：Smith Kendrick M^*; Huterer Dragan

来源：Monthly Notices of the Royal Astronomical Society, 2010, 403(1): 2-8.

DOI：10.1111/j.1365-2966.2009.15732.x

• cosmic microwave background
• large-scale structure of Universe

We revisit recent claims that there is a 'cold spot' in both number counts and brightness of radio sources in the NRAO (National Radio Astronomy Observatory) VLA (Very Large Array) Sky Survey (NVSS), with location coincident with the previously detected cold spot in Wilkinson Microwave Anisotropy Probe. Such matching cold spots would be difficult if not impossible to explain in the standard Lambda cold dark matter 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.

• 出版日期2010-3-21