Preferred axis of CMB parity asymmetry in the masked maps

@article{Cheng2016PreferredAO,
  title={Preferred axis of CMB parity asymmetry in the masked maps},
  author={Cheng Cheng and Wen Zhao and Qing Guo Huang and Larissa Santos},
  journal={Physics Letters B},
  year={2016},
  volume={757},
  pages={445-453}
}
Abstract Both WMAP and Planck data show a significant odd-multipole preference in the large scales of the cosmic microwave background (CMB) temperature anisotropies. If this pattern originates from cosmological effects, then it can be considered a crucial clue for a violation in the cosmological principle. By defining various direction dependent statistics in the full-sky Planck 2015 maps (see, for instance, Naselsky et al. (2012); W. Zhao (2014)), we found that the CMB parity asymmetry has a… 

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