Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cosmic Microwave Background Temperature and Polarization Anisotropy in
  Brans-Dicke Cosmology   We develop a formalism for calculating cosmic microwave background (CMB)
temperature and polarization anisotropies in cosmological models with
Brans-Dicke gravity. We then modify publicly available Boltzmann codes to
calculate numerically the temperature and polarization power spectra. Results
are illustrated with a few representative models. Comparing with the
general-relativistic model with the same cosmological parameters, both the
amplitude and the width of the acoustic peaks are different in the Brans-Dicke
models. We use a covariance-matrix calculation to investigate whether the
effects of Brans-Dicke gravity are degenerate with those of variation in other
cosmological parameters and to simultaneously determine whether forthcoming CMB
maps might be able to distinguish Brans-Dicke and general-relativistic
cosmology. Although the predicted power spectra for plausible Brans-Dicke
models differ from those in general relativity only slightly, we find that MAP
and/or the Planck Surveyor may in principle provide a test of Brans-Dicke
theory that is competitive to solar-system tests. For example, if all other
parameters except for the CMB normalization are fixed, a value of the
Brans-Dicke parameter omega as large as 500 could be identified with MAP, and
for Planck, values as large as omega \simeq3000 could be identified; these
sensitivities are decreased roughly by a factor of 3 if we marginalize over the
baryon density, Hubble constant, spectral index, and reionization optical
depth. In more general scalar-tensor theories, omega may evolve with time, and
in this case, the CMB probe would be complementary to that from solar-system
tests.

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The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
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The categories of this paper are: econ
28
The categories of this paper are: alg-geom