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slides
A Fast and Accurate Algorithm for Computing Tensor CBR Anisotropy
Authors
A. A. Starobinskii
A. A. Starobinskii
+25Â more
A. H. Guth
A. R. Liddle
B. J. T. Jones
D. H. Lyth
E. J. Copeland
E. J. Copeland
G. Jungman
J. M. Bardeen
K.-W. Ng
L. Abbott
L. Knox
L. Kofman
L. Kofman
M. S. Turner
M. S. Turner
M. S. Turner
Michael S. Turner
N. Sugiyama
R. Fabbri
S. Dodelson
S. Koranda
S. W. Hawking
V. A. Rubakov
Y. Wang
Yun Wang
Publication date
1 January 1995
Publisher
'American Physical Society (APS)'
Doi
Cite
View
on
arXiv
Abstract
Inflation gives rise to a nearly scale-invariant spectrum of tensor perturbations (gravitational waves), their contribution to the Cosmic Background Radiation (CBR) anisotropy depends upon the present cosmological parameters as well as inflationary parameters. The analysis of a sampling-variance-limited CBR map offers the most promising means of detecting tensor perturbations, but will require evaluation of the predicted multipole spectrum for a very large number of cosmological parameter sets. We present accurate polynomial formulae for computing the predicted variance of the multipole moments in terms of the cosmological parameters
Ω
Λ
\Omega_\Lambda
Ω
Λ
​
,
Ω
0
h
2
\Omega_0h^2
Ω
0
​
h
2
,
Ω
B
h
2
\Omega_B h^2
Ω
B
​
h
2
,
N
ν
N_{\nu}
N
ν
​
, and the power-law index
n
T
n_T
n
T
​
which are accurate to about 1\% for
l
≤
50
l\le 50
l
≤
50
and to better than 3\% for
50
<
l
≤
100
50< l \le 100
50
<
l
≤
100
(as compared to the numerical results of a Boltzmann code).Comment: LaTeX with psfig, 21 pages including 3 figures. The corresponding fortran program is available at http://fnas08.fnal.gov/. Submitted to Phys. Rev.
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info:doi/10.1103%2Fphysrevd.53...
Last time updated on 02/01/2020