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The clustering of dark matter halos depends on the assembly history of halos at fixed halo mass; a phenomenon referred to as \textit{halo assembly bias}. Halo assembly bias is readily observed in cosmological simulations of dark matter.…

Cosmology and Nongalactic Astrophysics · Physics 2022-07-08 Tomomi Sunayama , Surhud More , Hironao Miyatake

Conventional studies of galaxy clustering within the framework of halo models typically assume that the density profile of all dark matter haloes can be approximated by the Navarro-Frenk-White (NFW) spherically symmetric profile. However,…

Cosmology and Nongalactic Astrophysics · Physics 2024-04-09 Anna Durkalec , Agnieszka Pollo , Ummi Abbas

The fraction of galaxies with red colours depends sensitively on environment, and on the way in which environment is measured. To distinguish competing theories for the quenching of star formation, a robust and complete description of…

Cosmology and Nongalactic Astrophysics · Physics 2013-12-06 Stefanie Phleps , David J. Wilman , Stefano Zibetti , Tamás Budavári

Hierarchical structure formation implies that the number of subhalos within a dark matter halo depends not only on halo mass, but also on the formation history of the halo. This dependence on the formation history, which is highly…

Cosmology and Nongalactic Astrophysics · Physics 2015-08-27 Yao-Yuan Mao , Marc Williamson , Risa H. Wechsler

We use a large dark matter simulation of a LambdaCDM model to investigate the clustering and environmental dependence of the number of substructures in a halo. Focusing on redshift z=1, we find that the halo occupation distribution is…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-30 Rupert Croft , Tiziana Di Matteo , Nishikanta Khandai , Volker Springel , Anirban Jana , Jeffrey Gardner

If the formation of central galaxies in dark matter haloes traces the assembly history of their host haloes, in haloes of fixed mass, central galaxy clustering may show dependence on properties indicating their formation history. Such a…

Cosmology and Nongalactic Astrophysics · Physics 2022-12-19 Kevin S. McCarthy , Zheng Zheng , Hong Guo , Wentao Luo , Yen-Ting Lin

Context. The clustering of dark-matter halos depends primarily on halo mass. However, at fixed halo mass, numerical simulations have revealed multiple secondary dependencies. This so-called secondary halo bias has important implications for…

Astrophysics of Galaxies · Physics 2025-08-13 Yigon Kim , Antonio D. Montero-Dorta , Rory Smith , Jong-Ho Shinn

We interpret and model the statistical weak lensing measurements around 130,000 groups and clusters of galaxies in the Sloan Digital Sky Survey presented by Sheldon et al. 2007 (Paper I). We present non-parametric inversions of the 2D shear…

We provide new constraints on the connection between galaxies in the local universe, identified by the Sloan Digital Sky Survey (SDSS), and dark matter halos and their constituent substructures in the $\Lambda$CDM model using WMAP7…

Cosmology and Nongalactic Astrophysics · Physics 2013-06-20 Rachel M. Reddick , Risa H. Wechsler , Jeremy L. Tinker , Peter S. Behroozi

Galaxy-galaxy lensing measures the mean excess surface density DS(r) around a sample of lensing galaxies. We develop a method for combining DS(r) with the galaxy correlation function xi_gg(r) to constrain Omega_m and sigma_8, going beyond…

Astrophysics · Physics 2009-11-13 Jaiyul Yoo , Jeremy L. Tinker , David H. Weinberg , Zheng Zheng , Neal Katz , Romeel Davé

We present a clustering analysis of near ultraviolet (NUV) - optical color selected luminosity bin samples of green valley galaxies. These galaxy samples are constructed by matching the Sloan Digital Sky Survey Data Release 7 with the…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 Elisabeth Krause , Christopher M. Hirata , Christopher Martin , James D. Neill , Ted K. Wyder

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…

Cosmology and Nongalactic Astrophysics · Physics 2020-12-16 Boryana Hadzhiyska , Sownak Bose , Daniel Eisenstein , Lars Hernquist

We present the clustering properties and halo occupation distribution (HOD) modelling of very low redshift, hard X-ray-detected active galactic nuclei (AGN) using cross-correlation function measurements with Two-Micron All Sky Survey…

Astrophysics of Galaxies · Physics 2017-12-01 Mirko Krumpe , Takamitsu Miyaji , Alison L. Coil , Hector Aceves

We explore the galaxy-halo connection information that is available in low-redshift samples from the early data release of the Dark Energy Spectroscopic Instrument (DESI). We model the halo occupation distribution (HOD) from z=0.1-0.3 using…

We measure the two-point angular correlation function of a sample of 4,289,223 galaxies with r < 19.4 mag from the Sloan Digital Sky Survey as a function of photometric redshift, absolute magnitude and colour down to M_r - 5log h = -14 mag.…

We utilize $\Lambda$CDM halo occupation models of galaxy clustering to investigate the evolving stellar mass dependent clustering of galaxies in the PRIsm MUlti-object Survey (PRIMUS) and DEEP2 Redshift Survey over the past eight billion…

(Summary) Using the conditional luminosity function (CLF) -- the luminosity distribution of galaxies in a dark matter halo -- as the fundamental building block, we present an empirical model for the galaxy distribution. The model…

Astrophysics · Physics 2009-11-13 Asantha Cooray

We present measurements of the luminosity and color-dependence of galaxy clustering at 0.2<z<1.0 in the PRIsm MUlti-object Survey (PRIMUS). We quantify the clustering with the redshift-space and projected two-point correlation functions,…

This is the second paper of a series that reports on our investigation of the clustering properties of AGNs in the ROSAT All-Sky Survey (RASS) through cross-correlation functions (CCFs) with Sloan Digital Sky Survey (SDSS) galaxies. In this…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 Takamitsu Miyaji , Mirko Krumpe , Alison L. Coil , Hector Aceves