Journal
PHYSICAL REVIEW LETTERS
Volume 111, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.111.111302
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Funding
- Science and Technology Facilities Council [ST/K006606/1]
- EU [PIIF-GA-2011-300606]
- FCT (Portugal)
- National Science Foundation [NSF PHY11-25915]
- STFC [ST/K006606/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/K006606/1] Funding Source: researchfish
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We argue that the observed large-scale cosmic microwave anomalies, discovered by WMAP and confirmed by the Planck satellite, are most naturally explained in the context of a marginally open universe. Particular focus is placed on the dipole power asymmetry, via an open universe implementation of the large-scale gradient mechanism of Erickcek et al. Open inflation models, which are motivated by the string landscape and which can excite supercurvature'' perturbation modes, can explain the presence of a very-large-scale perturbation that leads to a dipole modulation of the power spectrum measured by a typical observer. We provide a specific implementation of the scenario which appears compatible with all existing constraints.
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