Redshift and luminosity evolution of the intrinsic alignments of galaxies in Horizon-AGN

Nora Elisa Chisari; Clotilde Laigle; Sandrine Codis; Yohan Dubois; Julien Devriendt; Lance Miller; Karim Benabed; Adrianne Slyz; Raphael Gavazzi; Christophe Pichon

doi:10.48550/arXiv.1602.08373

Redshift and luminosity evolution of the intrinsic alignments of galaxies in Horizon-AGN

Nora Elisa Chisari, Clotilde Laigle, Sandrine Codis, Yohan Dubois, Julien Devriendt, Lance Miller, Karim Benabed, Adrianne Slyz, Raphael Gavazzi, Christophe Pichon

Research output: Working paper › Preprint › Academic

Abstract

Intrinsic galaxy shape and angular momentum alignments can arise in cosmological large-scale structure due to tidal interactions or galaxy formation processes. Cosmological hydrodynamical simulations have recently come of age as a tool to study these alignments and their contamination to weak gravitational lensing. We probe the redshift and luminosity evolution of intrinsic alignments in Horizon-AGN between z=0 and z=3 for galaxies with an r-band absolute magnitude of 1 Mpc. Alignments of discs are null in projection and consistent with current low redshift observations. The combination of the two populations yields an overall amplitude a factor of ~4 lower than observed alignments of luminous red galaxies with a steeper luminosity dependence. The restriction on accurate galaxy shapes implies that the galaxy population in the simulation is complete only to an r-band absolute magnitude of

Original language	English
Publisher	arXiv
Pages	1-23
DOIs	https://doi.org/10.48550/arXiv.1602.08373
Publication status	Published - 26 Feb 2016

Keywords

astro-ph.CO

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10.48550/arXiv.1602.08373

1602.08373v2Submitted manuscript, 2.23 MB

https://arxiv.org/abs/1602.08373

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title = "Redshift and luminosity evolution of the intrinsic alignments of galaxies in Horizon-AGN",

abstract = " Intrinsic galaxy shape and angular momentum alignments can arise in cosmological large-scale structure due to tidal interactions or galaxy formation processes. Cosmological hydrodynamical simulations have recently come of age as a tool to study these alignments and their contamination to weak gravitational lensing. We probe the redshift and luminosity evolution of intrinsic alignments in Horizon-AGN between z=0 and z=3 for galaxies with an r-band absolute magnitude of 1 Mpc. Alignments of discs are null in projection and consistent with current low redshift observations. The combination of the two populations yields an overall amplitude a factor of ~4 lower than observed alignments of luminous red galaxies with a steeper luminosity dependence. The restriction on accurate galaxy shapes implies that the galaxy population in the simulation is complete only to an r-band absolute magnitude of ",

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T1 - Redshift and luminosity evolution of the intrinsic alignments of galaxies in Horizon-AGN

AU - Chisari, Nora Elisa

AU - Laigle, Clotilde

AU - Codis, Sandrine

AU - Dubois, Yohan

AU - Devriendt, Julien

AU - Miller, Lance

AU - Benabed, Karim

AU - Slyz, Adrianne

AU - Gavazzi, Raphael

AU - Pichon, Christophe

N1 - 23 pages, 17 figures, changes matching version accepted by MNRAS

PY - 2016/2/26

Y1 - 2016/2/26

N2 - Intrinsic galaxy shape and angular momentum alignments can arise in cosmological large-scale structure due to tidal interactions or galaxy formation processes. Cosmological hydrodynamical simulations have recently come of age as a tool to study these alignments and their contamination to weak gravitational lensing. We probe the redshift and luminosity evolution of intrinsic alignments in Horizon-AGN between z=0 and z=3 for galaxies with an r-band absolute magnitude of 1 Mpc. Alignments of discs are null in projection and consistent with current low redshift observations. The combination of the two populations yields an overall amplitude a factor of ~4 lower than observed alignments of luminous red galaxies with a steeper luminosity dependence. The restriction on accurate galaxy shapes implies that the galaxy population in the simulation is complete only to an r-band absolute magnitude of

AB - Intrinsic galaxy shape and angular momentum alignments can arise in cosmological large-scale structure due to tidal interactions or galaxy formation processes. Cosmological hydrodynamical simulations have recently come of age as a tool to study these alignments and their contamination to weak gravitational lensing. We probe the redshift and luminosity evolution of intrinsic alignments in Horizon-AGN between z=0 and z=3 for galaxies with an r-band absolute magnitude of 1 Mpc. Alignments of discs are null in projection and consistent with current low redshift observations. The combination of the two populations yields an overall amplitude a factor of ~4 lower than observed alignments of luminous red galaxies with a steeper luminosity dependence. The restriction on accurate galaxy shapes implies that the galaxy population in the simulation is complete only to an r-band absolute magnitude of

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U2 - 10.48550/arXiv.1602.08373

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BT - Redshift and luminosity evolution of the intrinsic alignments of galaxies in Horizon-AGN

PB - arXiv

ER -

Redshift and luminosity evolution of the intrinsic alignments of galaxies in Horizon-AGN

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