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Artículo

The manifestation of secondary bias on the galaxy population from IllustrisTNG300

Montero Dorta, Antonio D.; Artale, Maria CelesteIcon ; Abramo, L. Raul; Tucci, Beatriz; Padilla, Nelson DavidIcon ; Sato Polito, Gabriela; Lacerna, Ivan; Rodriguez, FacundoIcon ; Angulo, Raul E.
Fecha de publicación: 06/2020
Editorial: Wiley Blackwell Publishing, Inc
Revista: Monthly Notices of the Royal Astronomical Society
ISSN: 0035-8711
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Astronomía

Resumen

We use the improved IllustrisTNG300 magnetohydrodynamical cosmological simulation to revisit the effect that secondary halo bias has on the clustering of the central galaxy population. With a side length of 205 h−1 Mpc and significant improvements on the subgrid model with respect to previous Illustris simulations, IllustrisTNG300 allows us to explore the dependencies of galaxy clustering over a large cosmological volume and halo mass range. We show at high statistical significance that the halo assembly bias signal (i.e. the secondary dependence of halo bias on halo formation redshift) manifests itself on the clustering of the galaxy population when this is split by stellar mass, colour, specific star formation rate, and surface density. A significant signal is also found for galaxy size: at fixed halo mass, larger galaxies are more tightly clustered than smaller galaxies. This effect, in contrast to the rest of the dependencies, seems to be uncorrelated with halo formation time, with some small correlation only detected for halo spin. We also explore the transmission of the spin bias signal, i.e. the secondary dependence of halo bias on halo spin. Although galaxy spin retains little information about the total halo spin, the correlation is enough to produce a significant galaxy spin bias signal. We discuss possible ways to probe this effect with observations.
Palabras clave: COSMOLOGY: THEORY , DARK MATTER , GALAXIES: FORMATION , GALAXIES: HALOES , LARGE-SCALE STRUCTURE OF UNIVERSE , METHODS: NUMERICAL
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/141197
URL: https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/staa1624/585800
DOI: http://dx.doi.org/10.1093/mnras/staa1624
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Articulos de INST.DE ASTRONOMIA TEORICA Y EXPERIMENTAL
Citación
Montero Dorta, Antonio D.; Artale, Maria Celeste; Abramo, L. Raul; Tucci, Beatriz; Padilla, Nelson David; et al.; The manifestation of secondary bias on the galaxy population from IllustrisTNG300; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 496; 2; 6-2020; 1182-1196
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