145 citations · 195 across the 12 of their papers we have counts for
14 papers
Toward Black Hole Stars: supermassive black hole growth in nuclear clusters via stellar-object and gas accretion
Konstantinos Kritos, Joseph Silk
Supermassive black hole (SMBH) growth plausibly occurs via runaway astrophysical black hole mergers in nuclear star clusters that form intermediate mass black hole seeds at high re…
deci-Hz Gravitational Wave Observations on the Moon and Beyond
Emanuele Berti, Marica Branchesi, Alessandra Buonanno +21
This document summarizes talks and discussions from the workshop "deci-Hz Gravitational Wave Observations on the Moon and Beyond" that took place at Johns Hopkins University betwee…
Primordial Black-Hole-Based Pathways to Little Red Dots
Valerio De Luca, Loris Del Grosso, Gabriele Franciolini +4
The James Webb Space Telescope has uncovered a population of compact, high-redshift sources, the Little Red Dots (LRDs), which may host supermassive black holes (BHs) significantly…
From nuclear star clusters to Little Red Dots: black hole growth, mergers, and tidal disruptions
Konstantinos Kritos, Joseph Silk
Little Red Dots, discovered by the James Webb Space Telescope, are hypothesized to be active galactic nuclei containing a supermassive black hole, possibly surrounded by a dense st…
Beyond Extreme Burstiness: Evolving Star Formation Efficiency as the Key to Early Galaxy Abundance
Abhijnan Kar, Shadab Alam, Joseph Silk
JWST observations have revealed an overabundance of bright galaxies at , creating apparent tensions with theoretical predictions within standard CDM cosmology. We addr…
Black hole supercolliders
Andrew Mummery, Joseph Silk
We show that collisions between particles free falling from infinity and a disk of material plunging off the retrograde innermost stable circular orbit of a near-extremal Kerr blac…
Supermassive black hole growth in hierarchically merging nuclear star clusters
Konstantinos Kritos, Ricarda S. Beckmann, Joseph Silk +5
Supermassive black holes are prevalent at the centers of massive galaxies, and their masses scale with galaxy properties, increasing evidence suggesting that these trends continue…
TRINITY VI: Connection between Galaxy Star Formation Rates and Supermassive Black Hole Accretion Rates from z=0-10
Haowen Zhang, Peter Behroozi, Marta Volonteri +6
We infer supermassive black hole (SMBH) accretion rates and Eddington ratios as a function of SMBH/host galaxy mass and redshift with the empirical TRINITY model of dark matter hal…
Supermassive black holes from runaway mergers and accretion in nuclear star clusters
Konstantinos Kritos, Emanuele Berti, Joseph Silk
Rapid formation of supermassive black holes occurs in dense nuclear star clusters that are initially gas-dominated. Stellar-mass black hole remnants of the most massive cluster sin…
Effects of Superradiance in Active Galactic Nuclei
Priyanka Sarmah, Himanshu Verma, Kingman Cheung +1
A supermassive black hole (SMBH) at the core of an active galactic nucleus (AGN) provides room for the elusive ultra-light scalar particles (ULSP) to be produced through a phenomen…
Extremal Kerr Black Hole Dark Matter from Hawking Evaporation
Quinn Taylor, Glenn D. Starkman, Michael Hinczewski +3
The Hawking process results in a monotonic decrease of the black hole mass, but a biased random walk of the black hole angular momentum. We demonstrate that this stochastic process…
Which came first: supermassive black holes or galaxies? Insights from JWST
Joseph Silk, Mitchell Begelman, Colin Norman +2
Insights from JWST observations suggest that AGN feedback evolved from a short-lived, high redshift phase in which radiatively cooled turbulence and/or momentum-conserving outflows…
Density profile of dark matter haloes and galaxies in the Horizon-AGN simulation: the impact of AGN feedback
S. Peirani, Y. Dubois, M. Volonteri +7
Using a suite of three large cosmological hydrodynamical simulations, Horizon-AGN, Horizon-noAGN (no AGN feedback) and Horizon-DM (no baryons), we investigate how a typical sub-gri…
Supermassive black holes, star formation and downsizing of elliptical galaxies
A. Pipino, J. Silk, F. Matteucci
The overabundance of Mg relative to Fe, observed in the nuclei of bright ellipticals, and its increase with galactic mass, poses a serious problem for all current models of galaxy…