2026-04-17T00:56:14Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1148742025-12-05T16:10:19Zcom_2072_1057col_2072_478904col_2072_478917

00925njm 22002777a 4500 dc Verde, Licia author 2017-09-01T08:37:05Z 2017-09-01T08:37:05Z 2010 2017-09-01T08:37:05Z 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. Relativitat general (Física) Cosmologia General relativity (Physics) Cosmology Non-Gaussianity from large-scale structure surveys