Cross-Correlation between Cosmic Microwave Background Lensing and Galaxy Intrinsic Alignment as a Contaminant to Gravitational Lensing Cross-Correlated Probes of the Universe

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dc.contributor.ISNI0000 0001 2874 3832 (Ishak-Boushaki, M)
dc.contributor.authorTroxel, M. A.en_US
dc.contributor.authorIshak-Boushaki, Mustaphaen_US
dc.contributor.utdAuthorTroxel, M. A.en_US
dc.contributor.utdAuthorIshak-Boushaki, Mustaphaen_US
dc.date.accessioned2014-09-19T21:10:49Z
dc.date.available2014-09-19T21:10:49Z
dc.date.created2014-03-25en_US
dc.date.issued2014-03-25en_US
dc.description.abstractWe introduce here a cross-correlation term between CMB lensing and galaxy intrinsic alignment, noted here as φl. This effect acts as a contaminant to the cross correlation between CMB lensing and galaxy lensing. The latter cross correlation has recently been detected for the first time, and measurements will greatly improve as the area of overlap between galaxy and CMB surveys increases and measurements of the CMB polarization become more significant. This will constitute a powerful probe for studying the structure and evolution of the universe. The magnitude of the φl term is found to be about 15% of the pure CMB lensing- galaxy lensing component and acts to reduce the magnitude of its measured spectrum. This offset in the spectrum will strongly impact its use for precision cosmological study if left unmitigated. We also propose here a method to calibrate this φl contamination through the use of a scaling relation that allows one to reduce the impact of φl by a factor of 20 or more in all redshift bins, which would reduce its magnitude down to detection limits in almost all cases. This will allow the full use of this probe for precision cosmology.en_US
dc.description.sponsorshipUS National Science Foundation (AST-1109667)en_US
dc.identifier.bibliographicCitationTroxel, M. A., and Mustapha Ishak. 2014. "Cross-correlation between cosmic microwave background lensing and galaxy intrinsic alignment as a contaminant to gravitational lensing cross-correlated probes of the Universe." Physical Review D 89(6), doi:10.1103/PhysRevD.89.063528en_US
dc.identifier.issn1550-7998en_US
dc.identifier.issue6en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/4032
dc.identifier.volume89en_US
dc.language.isoenen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevD.89.063528
dc.rights©2014 American Physical Societyen_US
dc.sourcePhysical Review D
dc.subjectCosmic microwave background (CMB)en_US
dc.subjectGalaxiesen_US
dc.subjectIntrinsic alignmenten_US
dc.subjectSelf-calibrationen_US
dc.titleCross-Correlation between Cosmic Microwave Background Lensing and Galaxy Intrinsic Alignment as a Contaminant to Gravitational Lensing Cross-Correlated Probes of the Universeen_US
dc.type.genreArticleen_US

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