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Clustering Fossils from the Early Universe

Jeong, Donghui and Kamionkowski, Marc (2012) Clustering Fossils from the Early Universe. Physical Review Letters, 108 (25). Art. No. 251301. ISSN 0031-9007.

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Many inflationary theories introduce new scalar, vector, or tensor degrees of freedom that may then affect the generation of primordial density perturbations. Here we show how to search a galaxy (or 21-cm) survey for the imprint of primordial scalar, vector, and tensor fields. These new fields induce local departures to an otherwise statistically isotropic two-point correlation function, or equivalently, nontrivial four-point correlation functions (or trispectra, in Fourier space), that can be decomposed into scalar, vector, and tensor components. We write down the optimal estimators for these various components and show how the sensitivity to these modes depends on the galaxy-survey parameters. New probes of parity-violating early-Universe physics are also presented.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle
Kamionkowski, Marc0000-0001-7018-2055
Additional Information:© 2012 American Physical Society. Received 1 March 2012; published 19 June 2012. This work was supported by DOE Grant No. DE-FG03-92-ER40701 and NASA Grant No. NNX12AE86G.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG03-92-ER40701
Issue or Number:25
Classification Code:PACS: 98.80.Es, 95.80.+p, 98.65.Cw
Record Number:CaltechAUTHORS:20120720-103630429
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:32607
Deposited By: Tony Diaz
Deposited On:20 Jul 2012 19:28
Last Modified:03 Oct 2019 04:02

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