REVIEW 12 cited by
Episodic super-Eddington accretion as a clue to Overmassive Black Holes in the early Universe
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
abstract
Early JWST observations are providing growing evidence for a ubiquitous population of accreting supermassive black holes (BHs) at high redshift, many of which appear overmassive compared to the empirically-derived local scaling relation between black hole mass and host galaxy stellar mass. In this study, we leverage predictions from the semi-analytical Cosmic Archaeology Tool (CAT) to reconstruct the evolutionary pathways for this overmassive BH population, investigating how they assemble over cosmic time and interact with their host galaxies. We find that the large $M_{\rm BH}-M_{\rm star}$ ratios can be explained if light and heavy BH seeds grow by short, repeated episodes of super-Eddington accretion, triggered by major galaxy mergers. On average, we find that BH-galaxy co-evolution starts in earnest only at $z < 8$, when $\simeq 30\%$ of the final galaxy stellar mass has formed outside the massive black hole host. Our model suggests that super-Eddington bursts of accretion last between $0.5-3$ Myr, resulting in a duty cycle of $1-4 \%$ for the target BH sample. The boost in luminosity of BHs undergoing super-Eddington accretion helps explaining the luminosity function of Active Galactic Nuclei observed by JWST. At the same time, a large population of these overmassive BHs are predicted to be inactive, with Eddington ratio $\lambda_{\rm Edd} < 0.05$, in agreement with recent observations.
Forward citations
Cited by 12 Pith papers
-
Rapid growth in a dual AGN during a gas-rich merger at z~4.5
LID-1166 is the first confirmed close-separation (<3 kpc) dual AGN beyond the local Universe, hosting two accreting supermassive black holes in a gas-rich merger at z~4.5.
-
Supermassive Black Hole Growth in Massive Galaxies at Cosmic Dawn
In a simulated ~1e11 Msun halo at z 15-9, stellar feedback starves the central black hole about 50% of the time, and AGN feedback never quenches star formation.
-
What you see is what you get: empirically measured bolometric luminosities of Little Red Dots
Directly integrating the observed spectra of two Little Red Dots shows the bolometric luminosity is dominated by rest-frame optical light, lowering implied black hole masses to about 10^5 to 10^7 solar masses.
-
The $z=7.08$ quasar ULAS J1120+0641 May Never Reach a "Normal" Black Hole to Stellar Mass Ratio
The z=7.08 quasar J1120+0641 sits in an overdense environment, yet the available mass around it is probably insufficient for its host galaxy to reach the local black hole to stellar mass relation by z=0.
-
NEXUS: Spectral Variability of Little Red Dots and Blue Active Galactic Nuclei at $2 \lesssim z \lesssim 6$
Little Red Dots at z=2-6 show less than 4% intrinsic H-alpha variability on 1-3 month rest-frame timescales, a flat white-noise pattern unlike normal AGNs, implying different broad-line production.
-
How to raise a supermassive black hole: interpreting early JWST AGN with the AESOPICA simulations
A systematic simulation suite with a mock JWST survey shows early overmassive black holes can arise from any seed mass under fast accretion, and broad-line selection explains much of the observed overmassiveness.
-
Outflows in super-Eddington quasars drive clumpy circumgalactic medium and extended H$\alpha$ nebulae at $z \gtrsim 6$
In z≈6 quasar simulations, super-Eddington black-hole growth clears escape channels, ejects cold clumps that raise neutral-hydrogen covering, and powers extended Hα nebulae that shrink when the quasar is obscured.
-
An (in)complete NIRSpec census of Balmer absorption in Type 1 AGN -- radiation-driven outflows in little red dots, quasars and variable stars
About 44% of little red dots have hydrogen-alpha absorption from outflowing gas, implying radiatively driven outflows rather than static atmospheres.
-
The importance of super-Eddington black hole accretion for the emergence of massive quiescent galaxies at high redshift
Super-Eddington black hole accretion is the COLIBRE ingredient that reproduces JWST's high-redshift massive quiescent galaxy abundance.
-
Dating N loud AGNs at high redshift: GS3073 as a snapshot of wCen like evolution of a nuclear star cluster
GS3073's extreme nitrogen abundance is attributed to undiluted winds from 3 to 4 solar mass AGB stars, giving an age of 270 to 440 million years and requiring intermittent super-Eddington black hole growth.
-
You can't see me: Super-Eddington growth hindering X-ray detection in high-z broad-line active galactic nuclei
High-redshift JWST broad-line AGNs may be low-mass black holes accreting far above Eddington, whose steep, over-cooled coronal spectra explain their X-ray non-detections and make them appear overmassive.
-
The $M_{\rm BH}-M_\star$ Relation of the hyperluminous Dust-obscured Quasars up to $z \sim 4$
Hyperluminous Hot DOGs at z=1.5-3.7 show high Eddington ratios (median 1.05) and black hole to stellar mass ratios consistent with the local relation, suggesting they are progenitors of massive early-type galaxies.
Discussion (0). Sign in to comment.