82 citations · 216 across the 18 of their papers we have counts for
19 papers
The AGN Channel in 3D: Scattering Belts and the Importance of Eccentricity in the Black Hole Population
Connar Rowan, Martin E. Pessah
Active galactic nuclei (AGN) are a promising origin for observed gravitational wave mergers. Current population synthesis models are limited to 1D N-body or Monte Carlo methods whi…
Gravitational Wave Phase shifts of black hole mergers in AGN Disks
Hiromichi Tagawa, Connar Rowan, János Takátsy +4
Ground-based gravitational wave (GW) detectors have discovered about 200 compact object mergers. The astrophysical origins of these events are highly debated, and it is possible th…
Environmental effects in stellar mass gravitational wave sources II: Enhanced detectability of phase shifts in eccentric sub-populations
Lorenz Zwick, Kai Hendriks, Pankaj Saini +4
We demonstrate that the properties of eccentric gravitational wave (GW) signals enhance the detectability of GW phase shifts caused by environmental effects (EEs): The signal-to-no…
Spin-Orbit Misalignments of Eccentric Black Hole Mergers in AGN Disks
Gaia Fabj, Christopher Tiede, Connar Rowan +2
The disks of active galactic nuclei (AGNs) provide a natural environment where stellar-mass black holes (BHs) can dynamically pair, undergo repeated interactions, and eventually me…
Importance of relativistic pericenter precession in identifying the presence of a third body near eccentric binaries
Pankaj Saini, Lorenz Zwick, János Takátsy +5
Many astrophysical processes can produce gravitational wave (GW) sources with significant orbital eccentricity. These binaries emit bursts of gravitational radiation during each pe…
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…
Gas meets Kozai: the influence of a gas-rich accretion disc on hierarchical triples undergoing von Zeipel-Lidov-Kozai oscillations
Yubo Su, Connar Rowan, Mor Rozner
Active galactic nuclei (AGNs) consist of a central supermassive black hole (SMBH) embedded in a region with both high gas and stellar densities: the gas is present as a thin accret…
Environmental effects in stellar mass gravitational wave sources I: Expected fraction of signals with significant dephasing in the dynamical and AGN channels
Lorenz Zwick, János Takátsy, Pankaj Saini +5
We present the first overview of the expected quantity of signals which will showcase significant gravitational wave phase shifts caused by astrophysical environments, considering…
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…
Star-forming environments in smoothed particle magnetohydrodynamics simulations II: Re-simulating isolated clumps to determine equivalence of extracted clumps and parent simulations
James Wurster, Connar Rowan
What is the numerical reproducibility of a stellar system (including its discs) when evolving only a sub-set of (partially-evolved) smoothed particle hydrodynamics (SPH) particles?…
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)…
Star-forming environments in smoothed particle magnetohydrodynamics simulations I: Clump extraction and properties
James Wurster, Connar Rowan
What is the nature of a star forming clump? Observations reveal these to be chaotic environments being modified and influenced by many physical processes. However, numerical simula…
Black Hole Binary Formation in AGN Discs: From Isolation to Merger
Connar Rowan, Tjarda Boekholt, Bence Kocsis +1
Motivated by the increasing number of detections of merging black holes by LIGO-VIRGO-KAGRA, black hole (BH) binary mergers in the discs of active galactic nuclei (AGN) is investig…
On the Jacobi capture origin of binaries with applications to the Earth-Moon system and black holes in galactic nuclei
Tjarda C. N. Boekholt, Connar Rowan, Bence Kocsis
Close encounters between two bodies in a disc often result in a single orbital deflection. However, within their Jacobi volumes, where the gravitational forces between the two bodi…