The Diversity of Environments Around Luminous Quasars at Redshift $z\sim 6$

Abstract

Significant clustering around the rarest luminous quasars is a feature predicted by dark matter theory combined with number density matching arguments. However, this expectation is not reflected by observations of quasars residing in a diverse range of environments. Here, we assess the tension in the diverse clustering of visible $i$-band dropout galaxies around luminous $z\sim 6$ quasars. Our approach uses a simple empirical method to derive the median luminosity to halo mass relation, $L_c(M_h)$ for both quasars and galaxies under the assumption of log-normal luminosity scatter, ${\Sigma }_Q$ and ${\Sigma }_G$. We show that higher ${\Sigma }_Q$ reduces the average halo mass hosting a quasar of a given luminosity, thus introducing at least a partial reversion to the mean in the number count distribution of nearby Lyman-Break galaxies. We generate a large sample of mock Hubble Space Telescope fields-of-view centred across rare $z\sim 6$ quasars by resampling pencil beams traced through the dark matter component of the BlueTides cosmological simulation. We find that diverse quasar environments are expected for ${\Sigma }_Q>0.4$, consistent with numerous observations and theoretical studies. However, we note that the average number of galaxies around the central quasar is primarily driven by galaxy evolutionary processes in neighbouring halos, as embodied by our parameter ${\Sigma }_G$, instead of a difference in the large scale structure around the central quasar host, embodied by ${\Sigma }_Q$. We conclude that models with ${\Sigma }_G>0.3$ are consistent with current observational constraints on high-z quasars, and that such a value is comparable to the scatter estimated from hydrodynamical simulations of galaxy formation.

arXiv comment19 pages, 8 figures; accepted for publication in ApJ

References in corpus (77)

• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• Simulating the joint evolution of quasars, galaxies and their large-scale distribution
• The many lives of active galactic nuclei: cooling flows, black holes and the luminosities and colours of galaxies
• Energy input from quasars regulates the growth and activity of black holes and their host galaxies
• Large scale bias and the peak background split
• Modeling feedback from stars and black holes in galaxy mergers
• UV Luminosity Functions at redshifts z~4 to z~10: 10000 Galaxies from HST Legacy Fields
• UniverseMachine: The Correlation between Galaxy Growth and Dark Matter Halo Assembly from z=0-10
• Constraints on the relationship between stellar mass and halo mass at low and high redshift
• An 800-million-solar-mass black hole in a significantly neutral Universe at redshift 7.5
• Spectroscopic Target Selection in the Sloan Digital Sky Survey: The Quasar Sample
• A Comprehensive Analysis of Uncertainties Affecting the Stellar Mass - Halo Mass Relation for 0<z<4
• The Evolution of the Galaxy Rest-Frame Ultraviolet Luminosity Function Over the First Two Billion Years
• Constraining Galaxy Formation and Cosmology with the Conditional Luminosity Function of Galaxies
• Reevaluating Old Stellar Populations
• The Canada-France High-z Quasar Survey: nine new quasars and the luminosity function at redshift 6
• UV-Continuum Slopes of >4000 z~4-8 Galaxies from the HUDF/XDF, HUDF09, ERS, CANDELS-South, and CANDELS-North Fields
• Clustering of High Redshift ($z\ge 2.9$) Quasars from the Sloan Digital Sky Survey
• The Connection between Galaxies and Dark Matter Structures in the Local Universe
• Cosmic Variance and Its Effect on the Luminosity Function Determination in Deep High z Surveys
• Pōniuā'ena: A Luminous $z=7.5$ Quasar Hosting a 1.5 Billion Solar Mass Black Hole
• Galaxy Groups in the SDSS DR4: III. the luminosity and stellar mass functions
• Formation of z ~ 6 quasars from hierarchical galaxy mergers
• Selection Bias in Observing the Cosmological Evolution of the Mbh-sigma and Mbh-L Relationships
• A redshift-independent efficiency model: star formation and stellar masses in dark matter halos at z>4
• Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). V. Quasar Luminosity Function and Contribution to Cosmic Reionization at z = 6
• The BlueTides Simulation: First Galaxies and Reionization
• Unveiling the nature of bright z ~ 7 galaxies with the Hubble Space Telescope
• High redshift JWST predictions from IllustrisTNG: Dust modelling and galaxy luminosity functions
• Dark-ages reionization and galaxy formation simulation - III. Modelling galaxy formation and the epoch of reionization
• The environment of bright QSOs at z ~ 6: Star forming galaxies and X-ray emission
• Black Hole and Galaxy Coevolution from Continuity Equation and Abundance Matching
• On the radiative efficiencies, Eddington ratios, and duty cycles of luminous high-redshift quasars
• The Environments of High Redshift QSOs
• LCDM predictions for galaxy protoclusters I: the relation between galaxies, protoclusters and quasars at z~6
• A Simple Model for Quasar Demographics
• The origin of most massive black holes at high-z: BLUETIDES and the next quasar frontier
• Evidence for Primordial Clustering Around the QSO SDSS J1030+0524 at z=6.28
• What is L*?: Anatomy of the Galaxy Luminosity Function
• The Habitat Segregation between Lyman Break Galaxies and Lyman alpha Emitters around a QSO at z~5
• Imaging of SDSS z>6 quasar fields: gravitational lensing, companion galaxies and the host dark matter halos
• The primordial environment of super massive black holes: large scale galaxy overdensities around $z\sim 6$ QSOs with LBT
• The properties of the first galaxies in the BLUETIDES simulation
• The Impact of Scatter in the Galaxy UV Luminosity to Halo Mass Relation on Ly$\alpha$ Visibility During the Epoch of Reionization
• The galaxy environment of a QSO at z ~ 5.7
• A Large Number of z > 6 Galaxies around a QSO at z = 6.43: Evidence for a Protocluster?
• No overdensity of Lyman Alpha Emitting Galaxies around a quasar at z~5.7
• Are z~5 QSOs found in the most massive high redshift over-densities?
• Luminous Quasars Do Not Live in the Most Overdense Regions of Galaxies at z~4
• QSO obscuration at high redshift ($z\gtrsim 7$): Predictions from the BlueTides simulation
• Large Scale Environment of a $z=6.61$ Luminous Quasar Probed by Ly$\alpha$ Emitters and Lyman Break Galaxies
• Clustering of quasars in a wide luminosity range at redshift 4 with Subaru Hyper Suprime-Cam wide field imaging
• High redshift supermassive blackholes: accretion through cold flows
• Black hole obscuration and duty cycles mediated by AGN feedback in high redshift galaxies
• Strong Clustering of Lyman Break Galaxies around Luminous Quasars at z~4
• Forecasts for the WFIRST High Latitude Survey using the BlueTides Simulation
• The descendants of the first quasars in the BlueTides simulation
• The diverse galaxy counts in the environment of high-redshift massive black holes in Horizon-AGN
• The Brightest Galaxies at Cosmic Dawn from Scatter in the Galaxy Luminosity versus Halo Mass Relation
• Monsters in the Dark: Predictions for Luminous Galaxies in the Early Universe from the BlueTides Simulation
• No Evidence for Millimeter Continuum Source Overdensities in the Environments of $z\gtrsim 6$ Quasars
• Active Galactic Nucleus Environments and Feedback to Neighboring Galaxies at $z\sim 5$ Probed by Lyman-Alpha Emitters
• Gas outflows from the z= 7.54 quasar : predictions from the BlueTides Simulation
• Black hole clustering and duty cycles in the Illustris simulation
• The host galaxies of z=7 quasars: predictions from the BlueTides simulation
• Constraints on black hole duty cycles and the black hole-halo relation from SDSS quasar clustering
• The Dark Side of QSO Formation at High Redshifts
• Comparing Simple Quasar Demographics Models
• Evidence for Merger-Driven Activity in the Clustering of High Redshift Quasars
• The clustering of $z>7$ galaxies: Predictions from the BLUETIDES simulation
• On the Prevalence of Super-Massive Black Holes over Cosmic Time
• A tiny host galaxy for the first giant black hole: $z=7.5$ quasar in BlueTides
• The early growth of supermassive black holes in cosmological hydrodynamic simulations with constrained Gaussian realizations
• The Cosmic Web Around The Brightest Galaxies During The Epoch Of Reionization
• HOD modelling of high redshift galaxies using the BLUETIDES simulation
• Stochastic Processes as the Origin of the Double-Power Law Shape of the Quasar Luminosity Function
• Constraints On Duty Cycles Of Quasars At Z $\sim$ 6

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