Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cosmic microwave background anomalies in an open universe   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 `super-curvature'
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.

33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
7
The categories of this paper are: hep-th