Testing the Dipole Modulation Model in CMBR

Understand

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 suggest tests of the hemispherical power asymmetry both in real and multipole space.
• We find a significant signal of the dipole modulation model in WMAP and PLANCK data with our tests.