CMB anomalies after Planck

Schwarz D, Copi CJ, Huterer D, Starkman GD (2016)
Classical and Quantum Gravity 33(18): 184001.

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Several unexpected features have been observed in the microwave sky at large angular scales, both by WMAP and by Planck. Among those features is a lack of both variance and correlation on the largest angular scales, alignment of the lowest multipole moments with one another and with the motion and geometry of the solar system, a hemispherical power asymmetry or dipolar power modulation, a preference for odd parity modes and an unexpectedly large cold spot in the Southern hemisphere. The individual p-values of the significance of these features are in the per mille to per cent level, when compared to the expectations of the best-fit inflationary ACDM model. Some pairs of those features are demonstrably uncorrelated, increasing their combined statistical significance and indicating a significant detection of CMB features at angular scales larger than a few degrees on top of the standard model. Despite numerous detailed investigations, we still lack a clear understanding of these large-scale features, which seem to imply a violation of statistical isotropy and scale invariance of inflationary perturbations. In this contribution we present a critical analysis of our current understanding and discuss several ideas of how to make further progress.
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Schwarz D, Copi CJ, Huterer D, Starkman GD. CMB anomalies after Planck. Classical and Quantum Gravity. 2016;33(18): 184001.
Schwarz, D., Copi, C. J., Huterer, D., & Starkman, G. D. (2016). CMB anomalies after Planck. Classical and Quantum Gravity, 33(18), 184001. doi:10.1088/0264-9381/33/18/184001
Schwarz, D., Copi, C. J., Huterer, D., and Starkman, G. D. (2016). CMB anomalies after Planck. Classical and Quantum Gravity 33:184001.
Schwarz, D., et al., 2016. CMB anomalies after Planck. Classical and Quantum Gravity, 33(18): 184001.
D. Schwarz, et al., “CMB anomalies after Planck”, Classical and Quantum Gravity, vol. 33, 2016, : 184001.
Schwarz, D., Copi, C.J., Huterer, D., Starkman, G.D.: CMB anomalies after Planck. Classical and Quantum Gravity. 33, : 184001 (2016).
Schwarz, Dominik, Copi, Craig J., Huterer, Dragan, and Starkman, Glenn D. “CMB anomalies after Planck”. Classical and Quantum Gravity 33.18 (2016): 184001.
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