1209.4021 (Wen Zhao)

Probing WMAP Cold Spot through Local Minkowski Functions    [PDF]

Wen Zhao

In this paper, we introduce the local Minkowski Functions and apply them as the statistics to study the local properties of WMAP Cold Spot (CS) at different scales. We find that these local statistics always excess at the scale of $R\sim 5^{\circ}$ comparing with other spots of WMAP data, which clearly presents the non-Gaussianity of CS and its characteristic scale. Meanwhile, we find that the cosmic texture can excellently explain all the excesses in these statistics, which supports the cosmic texture explanation of WMAP CS.

View original: http://arxiv.org/abs/1209.4021