The alignment of dark matter halos with the cosmic web

Abstract

We investigate the orientation of the axes and angular momentum of dark matter halos with respect to their neighboring voids using high resolution N-body cosmological simulations. We find that the minor axis of halos tends to be aligned along the line joining the halo with the center of the void, and that the major axis is perpendicular to this line. However, we find that the angular momentum of halos does not have any particular orientation. These results may provide information about the mechanisms whereby the large-scale structure of the Universe affects galaxy formation and cast light upon the issue of the orientation of galaxy disks with respect to their host halos.

arXiv comment4 pages, 1 figure, accepted for publication in ApJ Letters

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• The Shape of Dark Matter Haloes in the Aquarius Simulations: Evolution and Memory
• The Large-Scale Orientations of Disk Galaxies
• Angular momentum-Large-scale structure alignments in LCDM models and the SDSS
• Alignments of galaxies within cosmic filaments from SDSS DR7
• The Three-Dimensional Shapes of Galaxy Clusters
• Galaxy orientation with the cosmic web across cosmic time
• The Alignments of the Galaxy Spins with the Real-Space Tidal Field Reconstructed from the Two Mass Redshift Survey
• The Hierarchical Nature of the Spin Alignment of Dark Matter Haloes in Filaments
• The orientation of disk galaxies around large cosmic voids
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• Alignments of Galaxy Group Shapes with Large Scale Structure
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• Clues on void evolution III: Structure and dynamics in void shells
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• The Nonlinear Evolution of Galaxy Intrinsic Alignments
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• Dark Matter Response to Galaxy Assembly History
• Measuring alignments between galaxies and the cosmic web at $z\sim 2-3$ using IGM tomography
• Simulated evolution of the dark matter large-scale structure
• Theoretical dark matter halo kinematics and triaxial shape
• Cosmological evolution of orientations of cluster-sized dark matter haloes and their central galaxies in the Horizon-AGN simulation
• Probing IGM large-scale flows: warps in galaxies at shells of voids
• Environmental dependence of ellipticity correlation functions of intrinsic alignments
• Statistical exploration of halo anisotropic clustering and intrinsic alignments with the mass-Peak Patch algorithm
• Caught in the cosmic web: environmental effects on subhalo abundance and internal density profiles
• The probability distribution of 3-D shapes of galaxy clusters from 2-D X-ray images