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Large-scale structure with gravitational waves. II. Shear

Schmidt, Fabian and Jeong, Donghui (2012) Large-scale structure with gravitational waves. II. Shear. Physical Review D, 86 (8). Art. No. 083513. ISSN 0556-2821. http://resolver.caltech.edu/CaltechAUTHORS:20121115-133417401

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Abstract

The B (curl) mode of the correlation of galaxy ellipticities (shear) can be used to detect a stochastic gravitational wave background, such as that predicted by inflation. In this paper, we derive the tensor mode contributions to shear from both gravitational lensing and intrinsic alignments, using the gauge-invariant, full-sky results of Schmidt and Jeong {arXiv:1204.3625 [Phys. Rev. D (to be published)]}. We find that the intrinsic alignment contribution, calculated using the linear alignment model, is larger than the lensing contribution by an order of magnitude or more, if the alignment strength for tensor modes is of the same order as for scalar modes. This contribution also extends to higher multipoles. These results make the prospects for probing tensor modes using galaxy surveys less pessimistic than previously thought, though still very challenging.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevD.86.083513DOIUNSPECIFIED
http://link.aps.org/doi/10.1103/PhysRevD.86.083513PublisherUNSPECIFIED
Additional Information:© 2012 American Physical Society. Received 30 May 2012; published 8 October 2012. We would like to thank Jonathan Blazek, Chris Hirata, Marc Kamionkowski, Eiichiro Komatsu, Samuel Gralla, Uroš Seljak, and Masahiro Takada for helpful discussions. F. S. is supported by the Gordon and Betty Moore Foundation at Caltech. D. J. was supported by NASA NNX12AE86G.
Group:Moore Center for Theoretical Cosmology and Physics
Funders:
Funding AgencyGrant Number
Gordon and Betty Moore FoundationUNSPECIFIED
NASANNX12AE86G
Classification Code:PACS: 98.65.Dx, 98.65.-r, 98.80.Jk
Record Number:CaltechAUTHORS:20121115-133417401
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20121115-133417401
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:35493
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:15 Nov 2012 22:43
Last Modified:20 Jan 2015 18:08

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