Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cross-correlation of 2MASS and WMAP3: Implications for the Integrated
  Sachs-Wolfe effect   We perform a cross-correlation of the Cosmic Microwave Background (CMB) using
the third year Wilkinson Microwave Anisotropy Probe (WMAP) data with the 2
Micron All Sky Survey (2MASS) galaxy map (about 828 000 galaxies with median
redshift z ~ 0.07). One motivation is to detect the Integrated Sachs-Wolfe
(ISW) effect, expected if the cosmic gravitational potential is time dependent;
for example, as it is in a flat universe with a Dark Energy component. The
measured spherical harmonic cross-correlation signal favours the ISW signal
expected in the concordance LambdaCDM model over that of zero correlation,
although both are consistent with the data within 2sigma. Within a flat
LambdaCDM model we find a best fit value of Omega_Lambda=0.85 and Omega_Lambda
< 0.89 (95% CL). The above limits assume a galaxy bias b_g(sigma_8/0.75) ~ 1.40
+/- 0.03, which we derived directly from the 2MASS auto-correlation. Another
goal is to test if previously reported anomalies in the WMAP data are related
to the galaxy distribution (the so-called ``Axis of Evil'' - AoE). No such
anomaly is observed in the 2MASS data nor are there any observed AoE
correlations between the 2MASS and WMAP3 data.

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The categories of this paper are: hep-th
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The categories of this paper are: physics
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The categories of this paper are: math-ph
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The categories of this paper are: solv-int
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The categories of this paper are: cond-mat
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The categories of this paper are: mtrl-th
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The categories of this paper are: ao-sci
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The categories of this paper are: gr-qc
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The categories of this paper are: supr-con
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The categories of this paper are: eess
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The categories of this paper are: cs
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The categories of this paper are: comp-gas
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The categories of this paper are: econ
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The categories of this paper are: nucl-ex
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The categories of this paper are: nucl-th
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The categories of this paper are: chao-dyn