Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On Axial and Plane--Mirror Inhomogeneities in the WMAP3 Cosmic Microwave
  Background Maps   We study inhomogeneities in the distribution of the excursion sets in the
Cosmic Microwave Background (CMB) temperature maps obtained by the three years
survey of the Wilkinson Microwave Anisotropy Probe (WMAP). At temperature
thresholds |T|<90 \mu K, the distributions of the excursion sets with over 200
pixels are concentrated in two regions, nearly at the antipodes, with galactic
coordinates l= 94^\circ.7, b= 34^\circ.4 and l= 279^\circ.8, b= -29^\circ.2.
The centers of these two regions drift towards the equator when the temperature
threshold is increased. The centers are located close to one of the vectors of
\ell =3 multipole. The two patterns of the substructures in the distribution of
the excursion sets are mirrored, with \chi^2=0.7-1.5. There is no obvious
origin of this effect in the noise structure of WMAP, and there is no evidence
for a dependence on the galactic cut. Would this effect be cosmological, it
could be an indication of an anomalously large component of horizon-size
density perturbations, independent of one of the spatial coordinates, and/or of
a non-trivial slab-like spatial topology of the Universe.

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The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
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The categories of this paper are: q-bio
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The categories of this paper are: chem-ph
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The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: nlin
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The categories of this paper are: econ
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The categories of this paper are: eess
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The categories of this paper are: funct-an
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The categories of this paper are: solv-int
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The categories of this paper are: adap-org
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The categories of this paper are: acc-phys
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The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph