49 citations · 275 across the 12 of their papers we have counts for
12 papers
The difficult path to coalescence: massive black hole dynamics in merging low mass dark matter haloes and galaxies
Christian Partmann, Thorsten Naab, Antti Rantala +3
We present a high resolution numerical study of the sinking and merging of massive black holes (MBHs) with masses in the range of in multiple mino…
KETJU -- resolving small-scale supermassive black hole dynamics in GADGET-4
Matias Mannerkoski, Alexander Rawlings, Peter H. Johansson +5
We present the new public version of the KETJU supermassive black hole (SMBH) dynamics module, as implemented into GADGET-4. KETJU adds a small region around each SMBH where the dy…
Modelling the accretion and feedback of supermassive black hole binaries in gas-rich galaxy mergers
Shihong Liao, Peter H. Johansson, Matias Mannerkoski +6
We introduce a new model for the accretion and feedback of supermassive black hole (SMBH) binaries to the KETJU code, which enables us to resolve the evolution of SMBH binaries dow…
BIFROST: simulating compact subsystems in star clusters using a hierarchical fourth-order forward symplectic integrator code
Antti Rantala, Thorsten Naab, Francesco Paolo Rizzuto +3
We present BIFROST, an extended version of the GPU-accelerated hierarchical fourth-order forward symplectic integrator code FROST. BIFROST (BInaries in FROST) can efficiently evolv…
The complex evolution of supermassive black holes in cosmological simulations
Peter H. Johansson, Matias Mannerkoski, Antti Rantala +4
We present here self-consistent zoom-in simulations of massive galaxies forming in a full cosmological setting. The simulations are run with an updated version of the KETJU code, w…
Signatures of the Many Supermassive Black Hole Mergers in a Cosmologically Forming Massive Early-Type Galaxy
Matias Mannerkoski, Peter H. Johansson, Antti Rantala +3
We model here the merger histories of the supermassive black hole (SMBH) population in the late stages of a cosmological simulation of a galaxy grou…
Resolving the Complex Evolution of a Supermassive Black Hole Triplet in a Cosmological Simulation
Matias Mannerkoski, Peter H. Johansson, Antti Rantala +2
We present here a self-consistent cosmological zoom-in simulation of a triple supermassive black hole (SMBH) system forming in a complex multiple galaxy merger. The simulation is r…
MSTAR -- a fast parallelised algorithmically regularised integrator with minimum spanning tree coordinates
Antti Rantala, Pauli Pihajoki, Matias Mannerkoski +2
We present the novel algorithmically regularised integration method MSTAR for high accuracy () integrations of N-body systems using minimum spanning tree c…
Gravitational Waves from the Inspiral of Supermassive Black Holes in Galactic-scale Simulations
Matias Mannerkoski, Peter H. Johansson, Pauli Pihajoki +2
We study the orbital evolution and gravitational wave (GW) emission of supermassive black hole (SMBH) binaries formed in gas-free mergers of massive early-type galaxies using the h…
Barycentric interpolation on Riemannian and semi-Riemannian spaces
Pauli Pihajoki, Matias Mannerkoski, Peter H. Johansson
Interpolation of data represented in curvilinear coordinates and possibly having some non-trivial, typically Riemannian or semi-Riemannian geometry is an ubiquitous task in all of…
General purpose ray-tracing and polarized radiative transfer in General Relativity
Pauli Pihajoki, Matias Mannerkoski, Joonas Nättilä +1
Ray-tracing is a central tool for constructing mock observations of compact object emission and for comparing physical emission models with observations. We present Arcmancer, a pu…
Ray-tracing and polarized radiative transfer in General Relativity
Pauli Pihajoki, Antti Rantala, Peter H. Johansson
We discuss the problem of polarized radiative transfer in general relativity. We present a set of equations suitable for solving the problem numerically for the case of an arbitrar…