中文
相关论文

相关论文: The Halo Occupation Distribution of Active Galacti…

200 篇论文

A semi-empirical model is presented that describes the distribution of Active Galactic Nuclei (AGN) on the cosmic web. It populates dark-matter halos in N-body simulations (MultiDark) with galaxy stellar masses using empirical relations…

高能天体物理现象 · 物理学 2018-12-26 A. Georgakakis , J. Comparat , A. Merloni , L. Ciesla , J. Aird , A. Finoguenov

We perform halo occupation distribution (HOD) modeling of the projected two-point correlation function (2PCF) of high-redshift (z~1.2) X-ray-bright active galactic nuclei (AGN) in the XMM-COSMOS field measured by Allevato et al. The HOD…

宇宙学与河外天体物理 · 物理学 2018-11-22 Jonathan W. Richardson , Suchetana Chatterjee , Zheng Zheng , Adam Myers , Ryan C. Hickox

We conducted precise measurements of Active Galactic Nuclei (AGNs) clustering at $z\sim1$ and $z\sim2$ by measuring the two-point cross-correlation function (CCF) between galaxies and X-ray-selected AGNs, and the two-point auto-correlation…

Deep X-ray surveys have provided a comprehensive and largely unbiased view of active galactic nuclei (AGN) evolution stretching back to $z \sim 5$. However, it has been challenging to use the survey results to connect this evolution to the…

宇宙学与河外天体物理 · 物理学 2016-09-21 D. R. Ballantyne

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…

宇宙学与河外天体物理 · 物理学 2015-05-20 Takamitsu Miyaji , Mirko Krumpe , Alison L. Coil , Hector Aceves

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…

星系天体物理 · 物理学 2017-12-01 Mirko Krumpe , Takamitsu Miyaji , Alison L. Coil , Hector Aceves

The connection between active galactic nuclei (AGN) and their host dark matter halos provides powerful insights into how supermassive black holes (SMBHs) grow and coevolve with their host galaxies. Here we investigate the impact of…

星系天体物理 · 物理学 2024-06-05 M. C. Powell , M. Krumpe , A. Coil , T. Miyaji

We present the first direct measurement of the mean Halo Occupation Distribution (HOD) of X-ray selected AGN in the COSMOS field at z < 1, based on the association of 41 XMM and 17 C-COSMOS AGN with member galaxies of 189 X-ray detected…

The spatial clustering of active galactic nuclei (AGNs) is considered to be one of the important diagnostics for the understanding of the underlying processes behind their activities complementary to measurements of the luminosity function…

Understanding the relationship between galaxies hosting active galactic nuclei (AGN) and the dark matter halos in which they reside is key to constraining how black-hole fueling is triggered and regulated. Previous efforts have relied on…

星系天体物理 · 物理学 2015-06-23 A. Leauthaud , A. J. Benson , F. Civano , A. L. Coil , K. Bundy , R. Massey , M. Schramm , A. Schulze , P. Capak , M. Elvis , A. Kulier , J. Rhodes

We investigate the clustering of Lyman-break galaxies (LBGs) at $z\sim4$. Using the hierarchical galaxy formation model GALFORM, we predict, for the first time using a semi-analytical model with feedback from active galactic nuclei (AGN),…

The orientation-based unification model of active galactic nuclei (AGNs) posits that the principle difference between obscured (Type 2) and unobscured (Type 1) AGNs is the line-of-sight into the central engine. If this model is correct than…

宇宙学与河外天体物理 · 物理学 2016-09-21 D. R. Ballantyne

Which galaxies in the general population turn into active galactic nuclei (AGNs) is a keystone of galaxy formation and evolution. Thanks to SRG/eROSITA's contiguous 140 square degree pilot survey field, we constructed a large, complete, and…

We study the occupation statistics of galaxies in dark matter haloes using galaxy groups identified from the 2-degree Field Galaxy Redshift Survey with the halo-based group finder of Yang et al. The occupation distribution is considered…

天体物理学 · 物理学 2009-11-10 Xiaohu Yang , H. J. Mo , Y. P. Jing , Frank C. van den Bosch

The optical Fundamental Plane of black hole activity relates radio continuum luminosity of Active Galactic Nuclei to [O III] luminosity and black hole mass. We examine the environments of low redshift ($z<0.2$) radio-selected AGN,…

星系天体物理 · 物理学 2018-06-13 Stanislav Shabala

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 various halo occupation statistics using a large galaxy group catalogue constructed from the SDSS DR4 with an adaptive halo-based group finder. The conditional luminosity function (CLF) is measured separately for all, red and…

天体物理学 · 物理学 2009-11-13 Xiaohu Yang , H. J. Mo , Frank C. van den Bosch

It is widely reported, based on clustering measurements of observed active galactic nuclei (AGN) samples, that AGN reside in similar mass host dark matter halos across the bulk of cosmic time, with log $M/M_\odot$~12.5-13.0 to z~2.5. We…

星系天体物理 · 物理学 2021-02-10 James Aird , Alison L. Coil

We investigate the effect of environment on the presence and fuelling of Active Galactic Nuclei (AGN) by identifying galaxies hosting AGN in massive galaxy clusters and the fields around them. We have identified AGN candidates via optical…

星系天体物理 · 物理学 2014-07-29 Alison J. Klesman , Vicki L. Sarajedini

We use the conditional luminosity function (CLF) and data from the 2dFGRS to constrain the average relation between light and mass in a LCDM cosmology with Omega_m=0.23 and sigma_8=0.74 (hereafter WMAP3 cosmology). Reproducing the observed…

‹ 上一页 1 2 3 10 下一页 ›