New observational Constraints on the Growth of the First Supermassive Black Holes

Abstract

We constrain the total accreted mass density in supermassive black holes at z>6, inferred via the upper limit derived from the integrated X-ray emission from a sample of photometrically selected galaxy candidates. Studying galaxies obtained from the deepest Hubble Space Telescope images combined with the Chandra 4 Msec observations of the Chandra Deep Field South, we achieve the most restrictive constraints on total black hole growth in the early Universe. We estimate an accreted mass density <1000Mo Mpc^-3 at z~6, significantly lower than the previous predictions from some existing models of early black hole growth and earlier prior observations. These results place interesting constraints on early black growth and mass assembly by accretion and imply one or more of the following: (1) only a fraction of the luminous galaxies at this epoch contain active black holes; (2) most black hole growth at early epochs happens in dusty and/or less massive - as yet undetected - host galaxies; (3) there is a significant fraction of low-z interlopers in the galaxy sample; (4) early black hole growth is radiatively inefficient, heavily obscured and/or is due to black hole mergers as opposed to accretion or (5) the bulk of the black hole growth occurs at late times. All of these possibilities have important implications for our understanding of high redshift seed formation models.

ApJ Accepted, 10 pages, 7 figures, 1 table, in emulateapj format

References in corpus (9)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
• A luminous quasar at a redshift of z = 7.085
• An Observational Determination of the Bolometric Quasar Luminosity Function
• Formation of Supermassive Black Holes by Direct Collapse in Pregalactic Halos
• Supermassive black hole formation during the assembly of pre-galactic discs
• The Luminosity Function of X-ray Selected Active Galactic Nuclei: Evolution of Supermassive Black Holes at High Redshift
• Lyman-break galaxies at z~5 -I. First significant stellar mass assembly in galaxies that are not simply z~3 LBGs at higher redshift
• The X-ray emission of Lyman break galaxies
• Can supermassive black hole seeds form in galaxy mergers?

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• Observational Signatures of High-Redshift Quasars and Local Relics of Black Hole Seeds
• The deepest X-ray view of high-redshift galaxies: constraints on low-rate black-hole accretion
• The systematic search for $z\gtrsim 5$ active galactic nuclei in the $Chandra$ Deep Field South
• On the Accretion Rates and Radiative Efficiencies of the Highest Redshift Quasars
• High-redshift galaxies and black holes in the eyes of JWST: a population synthesis model from infrared to X-rays
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• Inferences on the Relations Between Central Black Hole Mass and Total Galaxy Stellar Mass in the high-redshift Universe
• Mock catalogs for the extragalactic X-ray sky: simulating AGN surveys with Athena and with the AXIS probe
• Quasar UV luminosity function evolution up to z=8
• The Brightest Cluster Galaxy in Abell 85: The Largest Core Known so far
• The Formation of Supermassive Black Holes from Population III.1 Seeds. I. Cosmic Formation Histories and Clustering Properties
• Chasing the observational signatures of seed black holes at z > 7: candidate statistics
• The sustainable growth of the first black holes
• Chasing the observational signatures of seed black holes at z > 7: candidate observability
• Chandra counterparts of CANDELS GOODS-S sources
• Cosmic String Loops as the Seeds of Super-Massive Black Holes
• Faint progenitors of luminous $z\sim 6$ quasars: why don't we see them?
• AGN and their host galaxies in the local Universe: two mass independent Eddington ratio distribution functions characterize black hole growth
• An enhanced fraction of starbursting galaxies among high Eddington ratio AGNs
• BlueTides simulation: establishing black hole-galaxy relations at high-redshift
• BASS XXIX: The near-infrared view of the BLR: the effects of obscuration in BLR characterisation
• On the Physical Requirements for a Pre-Reionization Origin of the Unresolved Near-Infrared Background
• X-Ray Luminous Binaries, Metallicity, and the Early Universe
• Bright vigorous winds as signposts of supermassive black hole birth
• Cross-correlation between X-ray and optical/near-infrared background intensity fluctuations
• High-redshift SMBHs can grow from stellar-mass seeds via chaotic accretion
• The Assembly of Black Hole Mass and Luminosity Functions of High-redshift Quasars via Multiple Accretion Episodes
• Constraints from dwarf galaxies on black hole seeding and growth models with current and future surveys
• Light or heavy supermassive black hole seeds: the role of internal rotation in the fate of supermassive stars
• The Clustering of Undetected High-redshift Black Holes and Their Signatures in Cosmic Backgrounds
• Probing supermassive black hole seed scenarios with gravitational wave measurements
• SMBH Seeds: Model Discrimination with High Energy Emission Based on Scaling Relation Evolution
• Unseen Progenitors of Luminous High-z Quasars in the R_h=ct Universe
• Dark halo microphysics and massive black hole scaling relations in galaxies
• Radio recombination lines from obscured quasars with the SKA
• A Simple Condition for Sustained Super-Eddington Black Hole Growth