Pranati K. Rath, Pankaj Jain
The hemispherical power asymmetry, observed in the CMBR data, has generally been interpreted in terms of the dipole modulation model for the temperature fluctuations. Here we point out that this model leads to several predictions, which can be directly tested in the current data. We also suggest tests of the hemispherical power asymmetry in real space. We do not find a significant signal of the dipole modulation model in WMAP and PLANCK data. Hence the detected hemispherical anisotropy cannot be consistently represented in terms of the dipole modulation model. It probably represents a more complex anisotropic model.
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http://arxiv.org/abs/1308.0924
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