Three-point galaxy-galaxy lensing as a probe of dark matter halo shapes

Abstract

We propose a method to measure the ellipticities of dark matter halos using the lens-shear-shear 3-point correlation function. This method is immune to effects of galaxy-halo misalignments that can potentially limit 2-point galaxy-galaxy lensing measurements of halo anisotropy. Using a simple model for the projected mass distributions of dark matter halos, we construct an ellipticity estimator that sums over all possible triangular configurations of the 3-point function. By applying our estimator to halos from N-body simulations, we find that systematic errors in the recovered ellipticity will be at the <5% fractional level. We estimate that future imaging surveys like LSST will have sufficient statistics to detect halo ellipticities using 3-point lensing.

arXiv comment9 pages, to be submitted to JCAP

References in corpus (48)

• Weak Gravitational Lensing
• Halos and galaxies in the standard cosmological model: results from the Bolshoi simulation
• Triaxial Modeling of Halo Density Profiles with High-resolution N-body Simulations
• Cosmological Simulations with Self-Interacting Dark Matter I: Constant Density Cores and Substructure
• The Shape of Dark Matter Halos: Dependence on Mass, Redshift, Radius, and Formation
• Intrinsic alignment-lensing interference as a contaminant of cosmic shear
• The Sagittarius Dwarf Galaxy: a Model for Evolution in a Triaxial Milky Way Halo
• Cosmological Simulations with Self-Interacting Dark Matter II: Halo Shapes vs. Observations
• Rotation-Dependent Catastrophic Disruption of Gravitational Aggregates
• Dependence of the outer density profiles of halos on their mass accretion rate
• Halo Properties in Cosmological Simulations of Self-Interacting Cold Dark Matter
• Properties of galaxy dark matter halos from weak lensing
• The Effect of Gas Cooling on the Shapes of Dark Matter Halos
• The Galaxy-mass Correlation Function Measured from Weak Lensing in the SDSS
• CFHTLenS: Improving the quality of photometric redshifts with precision photometry
• Spin induced galaxy alignments and their implications for weak lensing measurements
• Intrinsic galaxy alignments from the 2SLAQ and SDSS surveys: luminosity and redshift scalings and implications for weak lensing surveys
• Detection of large scale intrinsic ellipticity-density correlation from the Sloan Digital Sky Survey and implications for weak lensing surveys
• Weak lensing surveys and the intrinsic correlation of galaxy ellipticities
• Density profiles of galaxy groups and clusters from SDSS galaxy-galaxy weak lensing
• Intrinsic Correlation of Galaxy Shapes: Implications for Weak Lensing Measurements
• Velocity trends in the debris of Sagittarius and the shape of the dark-matter halo of the Galaxy
• Photometric redshift analysis in the Dark Energy Survey Science Verification data
• CFHTLenS: Cosmological constraints from a combination of cosmic shear two-point and three-point correlations
• Galaxy-galaxy weak lensing in SDSS: intrinsic alignments and shear calibration errors
• Tying Dark Matter to Baryons with Self-interactions
• Disentangling Baryons and Dark Matter in the Spiral Gravitational Lens B1933+503
• The Effective Number Density of Galaxies for Weak Lensing Measurements in the LSST Project
• The Shapes and Alignments of Dark Matter Halos
• Constraints on the shape of the Milky Way dark matter halo from the Sagittarius stream
• The impact of baryons on the spins and shapes of dark matter haloes
• An algorithm for the direct reconstruction of the dark matter correlation function from weak lensing and galaxy clustering
• Testing the tidal alignment model of galaxy intrinsic alignment
• Ellipticity of dark matter halos with galaxy-galaxy weak lensing
• Galaxy Shapes and Intrinsic Alignments in The MassiveBlack-II Simulation
• The Masses and Shapes of Dark Matter Halos from Galaxy-Galaxy Lensing in the CFHTLS
• Weak lensing from space: first cosmological constraints from three-point shear statistics
• Separating intrinsic alignment and galaxy-galaxy lensing
• The Anisotropic Distribution of Satellite Galaxies
• The Sagittarius Stream and Halo Triaxiality
• Halo Shapes From Weak Lensing: The Impact of Galaxy--Halo Misalignment
• Constraints on the shapes of galaxy dark matter haloes from weak gravitational lensing
• The Einstein Cross: constraint on dark matter from stellar dynamics and gravitational lensing
• Photometric redshifts: estimating their contamination and distribution using clustering information
• Does the Sagittarius Stream constrain the Milky Way halo to be triaxial?
• CFHTLenS: Higher-order galaxy-mass correlations probed by galaxy-galaxy-galaxy lensing
• Towards an understanding of third-order galaxy-galaxy lensing
• Galaxy-Galaxy Lensing by Non-Spherical Haloes I:Theoretical Considerations

Cited by in corpus (15)

• Euclid. I. Overview of the Euclid mission
• Galaxy alignments: An overview
• Cluster-galaxy weak lensing
• The Projected Dark and Baryonic Ellipsoidal Structure of 20 CLASH Galaxy Clusters
• The ellipticity of galaxy cluster halos from satellite galaxies and weak lensing
• Halo ellipticity of GAMA galaxy groups from KiDS weak lensing
• Lensing Measurements of the Ellipticity of LRG Dark Matter Halos
• Dark matter in galaxies
• CFHTLenS: Weak lensing constraints on the ellipticity of galaxy-scale matter haloes and the galaxy-halo misalignment
• Tracer-Field Cross-Correlations with $k$-Nearest Neighbor Distributions
• Tightening weak lensing constraints on the ellipticity of galaxy-scale dark matter haloes
• Probing the azimuthal environment of galaxies around clusters. From cluster core to cosmic filaments
• The shape of dark matter haloes: results from weak lensing in the Ultraviolet Near-Infrared Optical Northern Survey (UNIONS)
• Mapping dark matter and finding filaments: calibration of lensing analysis techniques on simulated data
• Ellipticities of Galaxy Cluster Halos from Halo-Shear-Shear Correlations