Multitracing anisotropic non-Gaussianity with galaxy shapes

DSpace/Manakin Repository

Multitracing anisotropic non-Gaussianity with galaxy shapes

Citable link to this page

 

 
Title: Multitracing anisotropic non-Gaussianity with galaxy shapes
Author: Chisari, Nora Elisa; Dvorkin, Cora; Schmidt, Fabian; Spergel, David N.

Note: Order does not necessarily reflect citation order of authors.

Citation: Chisari, Nora Elisa, Cora Dvorkin, Fabian Schmidt, and David N. Spergel. 2016. Multitracing Anisotropic Non-Gaussianity with Galaxy Shapes. Physical Review D 94, no. 12. doi:10.1103/physrevd.94.123507.
Full Text & Related Files:
Abstract: Correlations between intrinsic galaxy shapes on large-scales arise due to the effect of the tidal field of the large-scale structure. Anisotropic primordial non-Gaussianity induces a distinct scaledependent imprint in these tidal alignments on large scales. Motivated by the observational finding that the alignment strength of luminous red galaxies depends on how galaxy shapes are measured, we study the use of two different shape estimators as a multi-tracer probe of intrinsic alignments. We show, by means of a Fisher analysis, that this technique promises a significant improvement on anisotropic non-Gaussianity constraints over a single-tracer method. For future weak lensing surveys, the uncertainty in the anisotropic non-Gaussianity parameter, A2, is forecast to be σ(A2) ≈ 50, ∼ 40% smaller than currently available constraints from the bispectrum of the Cosmic Microwave Background. This corresponds to an improvement of a factor of 4 − 5 over the uncertainty from a single-tracer analysis.
Published Version: 10.1103/physrevd.94.123507
Other Sources: https://arxiv.org/abs/1607.05232
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:29996106
Downloads of this work:

Show full Dublin Core record

This item appears in the following Collection(s)

 
 

Search DASH


Advanced Search
 
 

Submitters