Galaxy-halo alignments in the Horizon-AGN cosmological hydrodynamical simulation
Publication date
2017-02-13
Authors
Chisari, E.
Koukoufilippas, Nikolaos
Jindal, Abhinav
Peirani, Sebastien
Beckmann, Ricarda S.
Codis, Sandrine
Devriendt, Julien
Miller, Lance
Dubois, Yohan
Laigle, Clotilde
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Document Type
/dk/atira/pure/researchoutput/researchoutputtypes/workingpaper/preprint
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Abstract
Intrinsic alignments of galaxies are a significant astrophysical systematic affecting cosmological constraints from weak gravitational lensing. Obtaining numerical predictions from hydrodynamical simulations of expected survey volumes is expensive, and a cheaper alternative relies on populating large dark matter-only simulations with accurate models of alignments calibrated on smaller hydrodynamical runs. This requires connecting the shapes and orientations of galaxies to those of dark matter haloes and to the large-scale structure. In this paper, we characterise galaxy-halo alignments in the Horizon-AGN cosmological hydrodynamical simulation. We compare the shapes and orientations of galaxies in the redshift range $0
Keywords
astro-ph.CO
Citation
Chisari, N E, Koukoufilippas, N, Jindal, A, Peirani, S, Beckmann, R S, Codis, S, Devriendt, J, Miller, L, Dubois, Y, Laigle, C, Slyz, A & Pichon, C 2017 'Galaxy-halo alignments in the Horizon-AGN cosmological hydrodynamical simulation' arXiv, pp. 1-20. https://doi.org/10.48550/arXiv.1702.03913