Primordial Non-Gaussianity in the Cosmic Microwave Background
In the last few decades, advances in observational cosmology have given us a standard model of cosmology. We know the content of the universe to within a few percent. With more ambitious experiments on the way, we hope to move beyond the knowledge of what the universe is made of, to why the universe...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2010-01-01
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| Series: | Advances in Astronomy |
| Online Access: | http://dx.doi.org/10.1155/2010/565248 |
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| Summary: | In the last few decades, advances in observational cosmology have given us a standard model of cosmology.
We know the content of the universe to within a few percent. With more ambitious experiments on the way,
we hope to move beyond the knowledge of what the universe is made of, to why the universe is the way it
is. In this paper we focus on primordial non-Gaussianity as a probe of the physics of the dynamics of
the universe at the very earliest moments. We discuss (1) theoretical predictions from inflationary models and
their observational consequences in the cosmic microwave background (CMB) anisotropies; (2) CMB-based
estimators for constraining primordial non-Gaussianity with an emphasis on bispectrum templates (3) current
constraints on non-Gaussianity and what we can hope to achieve in the near future and (4) nonprimordial
sources of non-Gaussianities in the CMB such as bispectrum due to second order effects, three way crosscorrelation
between primary-lensing-secondary CMB, and possible instrumental effects. |
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| ISSN: | 1687-7969 1687-7977 |