39 citations · 98 across the 12 of their papers we have counts for
13 papers
Hydrodynamic Simulations of Eccentric Black Hole Encounters in AGN Discs
Andrew Imai, Henry Whitehead, Bence Kocsis
We investigate close encounters between stellar-mass black holes (BHs) in the gaseous discs of active galactic nuclei (AGNs), during which binary black holes (BBHs) may form. We pe…
cuDART: a GPU-accelerated ray tracing code for generating synthetic observations of relativistic astrophysical sources
Henry Whitehead, Emma L. Elley, Christoper N. Everett
The generation of synthetic observations is required to compare simulations of astrophysical phenomena with real sources. We present a new open-source toolkit cuDART which allows m…
The impact of flickering variability and magnetisation on the dynamics, stability and morphology of radio-loud AGN jets
Emma L. Elley, James H. Matthews, Henry Whitehead +1
The physics governing the morphology of radio-loud AGN jets is not fully understood. We investigate how magnetization, flickering jet power and their interplay affects the morpholo…
A relativistic jet from a neutron star breaking out of its natal supernova remnant
K. V. S. Gasealahwe, K. Savard, I. M. Monageng +10
The young neutron star X-ray binary, Cir X-1, resides within its natal supernova remnant and experiences ongoing outbursts every 16.5 days, likely due to periastron passage in an e…
Hydrodynamic simulations of black hole evolution in AGN discs II: inclination damping for partially embedded satellites
Henry Whitehead, Connar Rowan, Bence Kocsis
We investigate the evolution of black holes on orbits with small inclinations () to the gaseous discs of active galactic nuclei. We perform 3D adiabatic hydrodynamic s…
Hydrodynamic simulations of black hole evolution in AGN discs I: orbital alignment of highly inclined satellites
Connar Rowan, Henry Whitehead, Gaia Fabj +3
The frequency of compact object interactions in AGN discs is naturally tied to the number of objects embedded within it. We investigate the evolution of black holes in the nuclear…
3D Adiabatic Simulations of Binary Black Hole Formation in AGN
Henry Whitehead, Connar Rowan, Bence Kocsis
We investigate close encounters between initially unbound black holes (BHs) in the gaseous discs of active galactic nuclei (AGN), performing the first 3D non-isothermal hydrodynami…
Prompt gravitational-wave mergers aided by gas in Active Galactic Nuclei: The hydrodynamics of binary-single black hole scatterings
Connar Rowan, Henry Whitehead, Gaia Fabj +4
Black hole binary systems embedded in AGN discs have been proposed as a source of the observed gravitational waves (GWs) from LIGO-Virgo-KAGRA. Studies have indicated binary-single…
Black Hole Merger Rates in AGN: contribution from gas-captured binaries
Connar Rowan, Henry Whitehead, Bence Kocsis
It has been suggested that merging black hole (BH) binaries in active galactic nucleus (AGN) discs formed through two-body scatterings via the gas-capture process may explain a sig…
Disc Novae: Thermodynamics of Gas Assisted Binary Black Hole Formation in AGN Discs
Henry Whitehead, Connar Rowan, Tjarda Boekholt +1
We investigate the thermodynamics of close encounters between stellar mass black holes (BHs) in the gaseous discs of active galactic nuclei (AGN), during which binary black holes (…
Black Hole Binaries in AGN Accretion Discs II: Gas Effects on Black Hole Satellite Scatterings
Connar Rowan, Henry Whitehead, Tjarda Boekholt +2
The black hole (BH) binaries in active galactic nuclei (AGN) are expected to form mainly through scattering encounters in the ambient gaseous medium. Recent simulations, including…
Gas Assisted Binary Black Hole Formation in AGN Discs
Henry Whitehead, Connar Rowan, Tjarda Boekholt +1
We investigate close encounters by stellar mass black holes (BHs) in the gaseous discs of active galactic nuclei (AGN) as a potential formation channel of binary black holes (BBHs)…
Studying the link between radio galaxies and AGN fuelling with relativistic hydrodynamic simulations of flickering jets
Henry W. Whitehead, James H. Matthews
We present two- and three-dimensional hydrodynamic simulations of kpc-scale AGN jets with mean jet powers in the range erg~s, in which the jet powe…