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We examine the clustering properties of a population of quasars drawn from fully hydrodynamic cosmological simulations that directly follow black hole growth. We find that the black hole correlation function is best described by two…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 Colin DeGraf , Tiziana Di Matteo , Volker Springel

We study the properties of black holes and their host galaxies across cosmic time in the Illustris simulation. Illustris is a large scale cosmological hydrodynamical simulation which resolves a (106.5 Mpc)^3 volume with more than 12 billion…

Astrophysics of Galaxies · Physics 2015-07-15 Debora Sijacki , Mark Vogelsberger , Shy Genel , Volker Springel , Paul Torrey , Greg Snyder , Dylan Nelson , Lars Hernquist

We use Shen et al.'s (2009) measurements of luminosity-dependent clustering in the SDSS Data Release 5 Quasar Catalog, at redshifts 0.4 < z < 2.5, to constrain the relation between quasar luminosity and host halo mass and to infer the duty…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 Francesco Shankar , David H. Weinberg , Yue Shen

We use a very large simulation of structure growth in a LCDM universe -- the Millennium Simulation -- to study assembly bias, the fact that the large-scale clustering of haloes of given mass varies significantly with their assembly history.…

Astrophysics · Physics 2009-09-28 Liang Gao , Simon D. M. White

We explore the clustering properties of high redshift dark matter halos, focusing on halos massive enough to host early generations of stars or galaxies at redshift 10 and greater. Halos are extracted from an array of dark matter…

Astrophysics · Physics 2009-11-13 Darren S. Reed , Richard Bower , Carlos S. Frenk , Adrian Jenkins , Tom Theuns

We study the link between supermassive black hole growth and the stellar mass assembly of their host galaxies in the state-of-the-art Romulus suite of simulations. The cosmological simulations Romulus25 and RomulusC employ innovative…

Astrophysics of Galaxies · Physics 2019-09-25 Angelo Ricarte , Michael Tremmel , Priyamvada Natarajan , Thomas Quinn

We investigate the dependence of dark matter halo clustering on halo formation time, density profile concentration, and subhalo occupation number, using high-resolution numerical simulations of a LCDM cosmology. We confirm results that halo…

The observed number counts of quasars may be explained either by long-lived activity within rare massive hosts, or by short-lived activity within smaller, more common hosts. It has been argued that quasar lifetimes may therefore be inferred…

Astrophysics · Physics 2009-11-10 Stuart Wyithe , Abraham Loeb

High-resolution simulations of cosmological structure formation indicate that dark matter substructure in dense environments, like groups and clusters, may survive for a long time. These dark matter subhalos are the likely hosts of…

Astrophysics · Physics 2009-11-13 Andrew R. Wetzel , J. D. Cohn , Martin White

We study the spiral arm morphology of a sample of the local spiral galaxies in the Illustris simulation and explore the supermassive black hole - galaxy connection beyond the bulge (e.g., spiral arm pitch angle, total stellar mass, dark…

Astrophysics of Galaxies · Physics 2017-12-27 Burçin Mutlu-Pakdil , Marc S. Seigar , Ian B. Hewitt , Patrick Treuthardt , Joel C. Berrier , Lauren E. Koval

We examine predictions for the quasar luminosity functions (QLF) and quasar clustering at high redshift (z > 4.75) using MassiveBlack, our new hydrodynamic cosmological simulation which includes a self-consistent model for black hole growth…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-28 Colin DeGraf , Tiziana Di Matteo , Nishikanta Khandai , Rupert Croft , Julio Lopez , Volker Springel

A dark-matter-only Horizon Project simulation is used to investigate the environment- and redshift- dependence of accretion onto both halos and subhalos. These objects grow in the simulation via mergers and via accretion of diffuse non-halo…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-28 Henry Tillson , Lance Miller , Julien Devriendt

We study the evolution of the halo-halo correlation function and bias in a LCDM model using very high-resolution N-body simulations. The high force and mass resolution allows dark matter (DM) halos to survive in the tidal fields in…

Astrophysics · Physics 2007-05-23 Andrey Kravtsov , Anatoly Klypin , Pedro Colin , Alexei Khokhlov

We use a very large simulation of the concordance LCDM cosmogony to study the clustering of dark matter haloes. For haloes less massive than about 1e13Msun/h, the amplitude of the two-point correlation function on large scales depends…

Astrophysics · Physics 2010-04-06 Liang Gao , Volker Springel , Simon D. M. White

We study black hole - host galaxy correlations, and the relation between the over-massiveness (the distance from the average $M_{BH}-\sigma$ relation) of super-massive black holes (SMBHs) and star formation histories of their host galaxies…

We study how statistical properties of supermassive black holes depend on the frequency and conditions for massive seed formation in cosmological simulations of structure formation. We develop a novel method to recalculate detailed growth…

Astrophysics of Galaxies · Physics 2021-07-30 Colin DeGraf , Debora Sijacki

We investigate the spatial clustering of dark matter halos, collapsing from $1-4 \sigma$ fluctuations, in the redshift range $0 - 5$ using N-body simulations. The halo bias of high redshift halos ($z \geq 2$) is found to be strongly…

Cosmology and Nongalactic Astrophysics · Physics 2016-07-19 Charles Jose , Cedric G. Lacey , Carlton M. Baugh

Recently, a very large clustering length has been measured for quasars at a redshift of z~4. In combination with the observed quasar luminosity function we assess the implications of this clustering for the relationship between quasar…

Astrophysics · Physics 2015-05-13 Stuart Wyithe , Abraham Loeb

We investigate the evolution of galaxy clustering for galaxies in the redshift range 2.0<$z$<5.0 using the VIMOS Ultra Deep Survey (VUDS). We present the projected (real-space) two-point correlation function $w_p(r_p)$ measured by using…

We use the improved IllustrisTNG300 magneto-hydrodynamical 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…

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