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相关论文: On the origin of the evolution of the halo occupat…

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We explore two widely used empirical models for the galaxy-halo connection, subhalo abundance matching (SHAM) and the halo occupation distribution (HOD) and compare their predictions with the hydrodynamical simulation IllustrisTNG (TNG) for…

宇宙学与河外天体物理 · 物理学 2020-12-16 Boryana Hadzhiyska , Sownak Bose , Daniel Eisenstein , Lars Hernquist

We use the halo occupation distribution (HOD) framework to characterise the predictions from two independent galaxy formation models for the galactic content of dark matter haloes and its evolution with redshift. Our galaxy samples…

星系天体物理 · 物理学 2016-12-16 S. Contreras , I. Zehavi , C. M. Baugh , N. Padilla , P. Norberg

The halo occupation distribution is a cornerstone in understanding galaxy formation within the large-scale structure.On the other hand, in the context of the large-scale structure of the Universe, voids are regions with singular…

星系天体物理 · 物理学 2025-08-20 Ignacio G. Alfaro , Facundo Rodriguez , Andrés N. Ruiz

We study the evolution of the Halo Occupation Distribution (HOD) and galaxy properties of nodes and filamentary structures obtained by \textsc{DisPerSE} from the \textsc{Illustris TNG300-1} hydrodynamical simulation, in the redshift range…

We make use of the IllustrisTNG cosmological, hydrodynamical simulations to test fundamental assumptions of the mass-based Halo Occupation Distribution (HOD) approach to modelling the galaxy-halo connection. By comparing the clustering of…

宇宙学与河外天体物理 · 物理学 2020-08-11 Boryana Hadzhiyska , Sownak Bose , Daniel Eisenstein , Lars Hernquist , David N. Spergel

The halo occupation distribution (HOD) describes the bias between galaxies and dark matter by specifying (a) the probability P(N|M) that a halo of virial mass M contains N galaxies of a particular class and (b) the relative distributions of…

Halo Occupation Distribution (HOD) is a model giving the average number of galaxies in a dark matter halo, function of its mass and other intrinsic properties, like distance from halo center, luminosity and redshift of its constituting…

星系天体物理 · 物理学 2015-10-01 Ziad Sakr , Christophe Benoist

We model the luminosity-dependent projected two-point correlation function of DEEP2 (z~1) and SDSS (z~0) galaxies within the Halo Occupation Distribution (HOD) framework. At both epochs, there is a tight correlation between central galaxy…

天体物理学 · 物理学 2008-11-26 Zheng Zheng , Alison L. Coil , Idit Zehavi

We test different implementations of the halo occupation distribution (HOD) model to reconstruct the spatial distribution of galaxies as predicted by a publicly available semi-analytical model (SAM). We compare the measured two-point…

宇宙学与河外天体物理 · 物理学 2019-10-16 Esteban Jiménez , Sergio Contreras , Nelson Padilla , Idit Zehavi , Carlton M. Baugh , Violeta Gonzalez-Perez

We model the luminosity-dependent projected and redshift-space two-point correlation functions (2PCFs) of the Sloan Digital Sky Survey (SDSS) DR7 Main galaxy sample, using the halo occupation distribution (HOD) model and the subhalo…

We investigate galaxy bias in the framework of the ``Halo Occupation Distribution'' (HOD), which defines the bias of a population of galaxies by the conditional probability P(N|M) that a dark matter halo of virial mass M contains N…

天体物理学 · 物理学 2009-11-07 Andreas A. Berlind , David H. Weinberg

We develop an extension of subhalo abundance matching (SHAM) capable of accurately reproducing the real and redshift-space clustering of galaxies in a state-of-the-art hydrodynamical simulation. Our method uses a low-resolution gravity-only…

宇宙学与河外天体物理 · 物理学 2021-09-22 Sergio Contreras , Raul Angulo , Matteo Zennaro

The standard Halo Occupation Distribution (HOD) models were originally developed based on results from semi-analytic and hydrodynamical galaxy formation models. Those models have since progressed, in particular to include AGN feedback to…

星系天体物理 · 物理学 2017-05-08 Nuala McCullagh , Peder Norberg , Shaun Cole , Violeta Gonzalez-Perez , Carlton Baugh , John Helly

We investigate theoretical systematics caused by the application of the halo occupation distribution (HOD) to the study of galaxy clustering at non-linear scales. To do this, we repeat recent cosmological analyses using extended HOD models…

宇宙学与河外天体物理 · 物理学 2024-11-08 Zhongxu Zhai , Will Percival

We examine the evolution of assembly bias using a semi-analytical model of galaxy formation implemented in the Millennium-WMAP7 N-body simulation. We consider fixed number density galaxy samples ranked by stellar mass or star formation…

星系天体物理 · 物理学 2019-02-15 Sergio Contreras , Idit Zehavi , Nelson Padilla , Carlton Baugh , Esteban Jiménez , Ivan Lacerna

We use the {\sc Illustris TNG300} magneto-hydrodynamic simulation, the {\sc SAGE} semi-analytical model, and the subhalo abundance matching technique (SHAM) to examine the diversity in predictions for galaxy assembly bias (i.e. the…

星系天体物理 · 物理学 2021-05-12 Sergio Contreras , Raul Angulo , Matteo Zennaro

Halo models provide a simple and computationally inexpensive way to investigate the connection between galaxies and their dark matter haloes. However, these models rely on the assumption that the role of baryons can be easily parametrized…

宇宙学与河外天体物理 · 物理学 2020-01-08 Gillian D. Beltz-Mohrmann , Andreas A. Berlind , Adam O. Szewciw

The galaxy-halo connection traces processes by which galaxies form and evolve. The halo occupation distribution (HOD) describes the relationship between galaxies and their host dark matter haloes. Measurements of the galaxy two-point…

宇宙学与河外天体物理 · 物理学 2026-03-20 Jacob Kennedy , Eric Gawiser , Kartheik G. Iyer , L. Y. Aaron Yung

We employ the hydrodynamical simulation IllustrisTNG-300-1 to explore the halo occupation distribution (HOD) and environmental dependence of luminous star-forming emission-line galaxies (ELGs) at $z \sim 1$. Such galaxies are key targets…

星系天体物理 · 物理学 2021-02-10 Boryana Hadzhiyska , Sandro Tacchella , Sownak Bose , Daniel J. Eisenstein

To extract information from the clustering of galaxies on non-linear scales, we need to model the connection between galaxies and halos accurately and in a flexible manner. Standard halo occupation distribution (HOD) models make the…

宇宙学与河外天体物理 · 物理学 2022-09-22 Ana Maria Delgado , Digvijay Wadekar , Boryana Hadzhiyska , Sownak Bose , Lars Hernquist , Shirley Ho
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