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Artale, M.C.; Zehavi, I.; Contreras, S.; Norberg, P. "The impact of assembly bias on the halo occupation in hydrodynamical simulations" (2018) Monthly Notices of the Royal Astronomical Society. 480(3):3978-3992
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Abstract:

We investigate the variations in galaxy occupancy of the darkmatter haloes with the large-scale environment and halo formation time, using two state-of-the-art hydrodynamical cosmological simulations, EAGLE and Illustris. For both simulations, we use three galaxy samples with a fixed number density ranked by stellar mass. For these samples, we find that low-mass haloes in the most dense environments are more likely to host a central galaxy than those in the least dense environments. When splitting the halo population by formation time, these relations are stronger. Hence, at a fixed low halo mass, early-formed haloes are more likely to host a central galaxy than late-formed haloes since they have had more time to assemble. The satellite occupation shows a reverse trend where early-formed haloes host fewer satellites due to having more time to merge with the central galaxy. We also analyse the stellar mass-halo mass relation for central galaxies in terms of the large-scale environment and formation time of the haloes. We find that low-mass haloes in themost dense environment host relatively more massive central galaxies. This trend is also found when splitting the halo population by age, with early-formed haloes hosting more massive galaxies. Our results are in agreement with previous findings from semi-analytical models, providing robust predictions for the occupancy variation signature in the halo occupation distribution of galaxy formation models. © 2018 The Author(s).

Registro:

Documento: Artículo
Título:The impact of assembly bias on the halo occupation in hydrodynamical simulations
Autor:Artale, M.C.; Zehavi, I.; Contreras, S.; Norberg, P.
Filiación:Institut für Astro-und Teilchenphysik, Universität Innsbruck, Technikerstrasse 25/8, Innsbruck, A-6020, Austria
CONICET-Universidad de Buenos Aires, Instituto de Astronomía y Física del Espacio (IAFE), CC 67, Suc. 28, Buenos Aires, 1428, Argentina
Department of Physics, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, United States
Instituto Astrofísica, Pontifica Universidad Católica de Chile, Santiago, Chile
Centro de Estudios de Física del Cosmos de Aragón (CEFCA), Plaza San Juan 1, Planta-2, Teruel, E-44001, Spain
ICC and CEA, Department of Physics, Durham University, South Road, Durham, DH1 3LE, United Kingdom
Palabras clave:Cosmology: theory; Galaxies: formation; Galaxies: haloes; Galaxies: statistics; Large-scale structure of Universe
Año:2018
Volumen:480
Número:3
Página de inicio:3978
Página de fin:3992
DOI: http://dx.doi.org/10.1093/MNRAS/STY2110
Título revista:Monthly Notices of the Royal Astronomical Society
Título revista abreviado:Mon. Not. R. Astron. Soc.
ISSN:00358711
CODEN:MNRAA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00358711_v480_n3_p3978_Artale

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Citas:

---------- APA ----------
Artale, M.C., Zehavi, I., Contreras, S. & Norberg, P. (2018) . The impact of assembly bias on the halo occupation in hydrodynamical simulations. Monthly Notices of the Royal Astronomical Society, 480(3), 3978-3992.
http://dx.doi.org/10.1093/MNRAS/STY2110
---------- CHICAGO ----------
Artale, M.C., Zehavi, I., Contreras, S., Norberg, P. "The impact of assembly bias on the halo occupation in hydrodynamical simulations" . Monthly Notices of the Royal Astronomical Society 480, no. 3 (2018) : 3978-3992.
http://dx.doi.org/10.1093/MNRAS/STY2110
---------- MLA ----------
Artale, M.C., Zehavi, I., Contreras, S., Norberg, P. "The impact of assembly bias on the halo occupation in hydrodynamical simulations" . Monthly Notices of the Royal Astronomical Society, vol. 480, no. 3, 2018, pp. 3978-3992.
http://dx.doi.org/10.1093/MNRAS/STY2110
---------- VANCOUVER ----------
Artale, M.C., Zehavi, I., Contreras, S., Norberg, P. The impact of assembly bias on the halo occupation in hydrodynamical simulations. Mon. Not. R. Astron. Soc. 2018;480(3):3978-3992.
http://dx.doi.org/10.1093/MNRAS/STY2110