Optimization of spectroscopic surveys for testing non-Gaussianity

被引：18
作者：
Raccanelli, Alvise [1 ,2 ]
Dore, Olivier [1 ,2 ]
Dalal, Neal [3 ]
机构：
[1] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA
[2] CALTECH, Pasadena, CA 91125 USA
[3] Univ Illinois, Dept Astron, Urbana, IL 61801 USA
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2015年 / 08期
关键词：
redshift surveys; inflation; cosmological parameters from LSS; physics of the early universe; REDSHIFT-SPACE DISTORTIONS; PRIMORDIAL NON-GAUSSIANITY; DISTANCE SCALE; GALAXY SURVEYS; COSMOLOGY; GROWTH; INFLATION; GRAVITY; LAMBDA;
D O I：
10.1088/1475-7516/2015/08/034
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We investigate optimization strategies to measure primordial non-Gaussianity with future spectroscopic surveys. We forecast measurements coming from the 3D galaxy power spectrum and compute constraints on primordial non-Gaussianity parameters f(NL), and nNG. After studying the dependence on those parameters upon survey specifications such as redshift range, area, number density, we assume a reference mock survey and investigate the trade-off between number density and area surveyed. We then define the observational requirements to reach the detection of f(NL) of order 1. Our results show that power spectrum constraints on non-Gaussianity from future spectroscopic surveys can improve on current CMB limits, but the multi-tracer technique and higher order correlations will be needed in order to reach an even better precision in the measurements of the non-Gaussianity parameter f(NL).
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页数：17
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