Probing Dark Energy with Lensing Magnification in Photometric Surveys

Abstract

I present an estimator for the angular cross-correlation of two tracers of the cosmological large-scale structure that utilizes redshift information to isolate separate physical contributions. The estimator is derived by solving the Limber equation for a re-weighting of the foreground tracer that nulls either clustering or lensing contributions to the cross-correlation function. Applied to future photometric surveys, the estimator can enhance the measurement of gravitational lensing magnification effects to provide a competitive independent constraint on the dark energy equation of state.

5 pages, 3 figures, accepted for publication in PRL

References in corpus (3)

• Measuring primordial non-gaussianity without cosmic variance
• Using Galaxy Two-point Correlation Functions to Determine the Redshift Distributions of Galaxies Binned by Photometric Redshift
• Reconstructing Redshift Distributions with Cross-Correlations: Tests and an Optimized Recipe

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• Galaxy alignments: Observations and impact on cosmology
• Strongly Lensed Gravitational Waves and Electromagnetic Signals as Powerful Cosmic Rulers
• Large-scale imprint of relativistic effects in the cosmic magnification
• Statistical separation of weak gravitational lensing and intrinsic ellipticities based on galaxy colour information
• Model selection using time-delay lenses