Optimization of spectroscopic surveys for testing non-Gaussianity
- Creators
- Raccanelli, Alvise
- Doré, Olivier
- Dalal, Neal
Abstract
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 n_(NG). 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 while power spectrum constraints on non-Gaussianity from future spectroscopic surveys can be competitive with current CMB limits, measurements from higher-order statistics will be needed to reach a sub unity precision in the measurements of the non-Gaussianity parameter f_(NL).
Additional Information
© 2015 IOP Publishing. Received 24 October 2014; Accepted 13 July 2015; Published 17 August 2015. Part of the research described in this paper was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. We would like to thank Dragan Huterer and Vincent Desjacques for useful suggestions, and David Bacon, Nicola Bartolo, Sabino Matarrese and Will Percival for useful discussions.Attached Files
Submitted - 1409.1927v1.pdf
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Additional details
- Eprint ID
- 52956
- Resolver ID
- CaltechAUTHORS:20141217-104615600
- NASA/JPL/Caltech
- Created
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2014-12-17Created from EPrint's datestamp field
- Updated
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2023-03-15Created from EPrint's last_modified field