Non-Gaussianity from Large-Scale Structure Surveys
With the advent of galaxy surveys which provide large samples of galaxies or galaxy clusters over a volume comparable to the horizon size (SDSS-III, HETDEX, Euclid, JDEM, LSST, Pan-STARRS, CIP, etc.) or mass-selected large cluster samples over a large fraction of the extra-galactic sky (Planck, SPT,...
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| Format: | Article |
| Language: | English |
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Hindawi Limited
2010-01-01
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| Series: | Advances in Astronomy |
| Online Access: | http://dx.doi.org/10.1155/2010/768675 |
| Summary: | With the advent of galaxy surveys which provide large samples of galaxies or galaxy clusters over a volume comparable to the horizon size (SDSS-III,
HETDEX, Euclid, JDEM, LSST, Pan-STARRS, CIP, etc.) or mass-selected large
cluster samples over a large fraction of the extra-galactic sky (Planck, SPT, ACT,
CMBPol, B-Pol), it is timely to investigate what constraints these surveys can
impose on primordial non-Gaussianity. I illustrate here three different
approaches: higher-order correlations of the three dimensional galaxy
distribution, abundance of rare objects (extrema of the density distribution), and
the large-scale clustering of halos (peaks of the density distribution). Each of
these avenues has its own advantages, but, more importantly, these approaches
are highly complementary under many respects. |
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| ISSN: | 1687-7969 1687-7977 |