231 citations · 1.5k across the 24 of their papers we have counts for
24 papers
Non-intrusive hierarchical coupling strategies for multi-scale simulations in gravitational dynamics
Simon Portegies Zwart, Inti Pelupessy, Carmen Martinez-Barbosa +2
Hierarchical code coupling strategies make it possible to combine the results of individual numerical solvers into a self-consistent symplectic solution. We explore the possibility…
Capture of exocomets and the erosion of the Oort cloud due to stellar encounters in the Galaxy
Joris Hanse, Lucie Jilkova, Simon F. Portegies Zwart +1
The Oort cloud (OC) probably formed more than 4Gyr ago and has been moving with the Sun in the Galaxy since, exposed to external influences, most prominently to the Galactic ti…
Changes in orientation and shape of protoplanetary discs moving through an ambient medium
T. P. G. Wijnen, F. I. Pelupessy, O. R. Pols +1
Misalignments between the orbital planes of planets and the equatorial planes of their host stars have been observed in our solar system, in transiting exoplanets, and in the orbit…
Disc truncation in embedded star clusters: Dynamical encounters versus face-on accretion
T. P. G. Wijnen, O. R. Pols, F. I. Pelupessy +1
Observations indicate that the dispersal of protoplanetary discs in star clusters occurs on time scales of about 5 Myr. Several processes are thought to be responsible for this dis…
Characterising face-on accretion onto and the subsequent contraction of protoplanetary discs
T. P. G. Wijnen, O. R. Pols, F. I. Pelupessy +1
Observations indicate that stars generally lose their protoplanetary discs on a timescale of about 5 Myr. Which mechanisms are responsible for the disc dissipation is still debated…
Face-on accretion onto a protoplanetary disc
T. P. G. Wijnen, O. R. Pols, F. I. Pelupessy +1
Globular clusters (GCs) are known to harbor multiple stellar populations. To explain these observations Bastian et al. suggested a scenario in which a second population is formed b…
The Origin of Chaos in the Orbit of Comet 1P/Halley
Tjarda C. N. Boekholt, F. Inti Pelupessy, Douglas C. Heggie +1
According to Munoz-Gutierrez et al. (2015) the orbit of comet 1P/Halley is chaotic with a surprisingly small Lyapunov time scale of order its orbital period. In this work we analys…
The influence of dense gas rings on the dynamics of a stellar disk in the Galactic center
Alessandro Alberto Trani, Michela Mapelli, Alessandro Bressan +3
The Galactic center hosts several hundred early-type stars, about 20% of which lie in the so-called clockwise disk, while the remaining 80% do not belong to any disks. The circumnu…
Star Formation in the vicinity of Nuclear Black Holes: Young Stellar Objects close to Sgr A*
B. Jalali, F. I. Pelupessy, A. Eckart +6
It is often assumed that the strong gravitational field of a super-massive black hole disrupts an adjacent molecular cloud preventing classical star formation in the deep potential…
A connected component-based method for efficiently integrating multiscale -body systems
Jürgen Jänes, Federico I. Pelupessy, Simon F. Portegies Zwart
We present a novel method for efficient direct integration of gravitational N-body systems with a large variation in characteristic time scales. The method is based on a recursive…
Young Stellar Objects close to Sgr A*
B. Jalali, I. Pelupessy, A. Eckart +6
We aim at modelling small groups of young stars such as IRS 13N, 0.1 pc away from Sgr A*, which is suggested to contain a few embedded massive young stellar objects. We perform hyd…
The Astrophysical Multipurpose Software Environment
F. I. Pelupessy, A. van Elteren, N. de Vries +3
We present the open source Astrophysical Multi-purpose Software Environment (AMUSE, www.amusecode.org), a component library for performing astrophysical simulations involving diffe…
The formation of planets in circumbinary disks
F. I. Pelupessy, S. Portegies Zwart
We examine the formation of planets around binary stars in light of the recently discovered systems Kepler 16, 34 and 35. We conduct hydrodynamical simulations of self gravitating…
N-body Integrators with Individual Time Steps from Hierarchical Splitting
Federico I. Pelupessy, Jürgen Jänes, Simon F. Portegies Zwart
We review the implementation of individual particle time-stepping for N-body dynamics. We present a class of integrators derived from second order Hamiltonian splitting. In contras…
Multi-physics simulations using a hierarchical interchangeable software interface
Simon Portegies Zwart, Steve McMillan, Arjen van Elteren +2
We introduce a general-purpose framework for interconnecting scientific simulation programs using a homogeneous, unified interface. Our framework is intrinsically parallel, and con…
High-Performance Distributed Multi-Model / Multi-Kernel Simulations: A Case-Study in Jungle Computing
Niels Drost, Jason Maassen, Maarten A. J. van Meersbergen +6
High-performance scientific applications require more and more compute power. The concurrent use of multiple distributed compute resources is vital for making scientific progress.…
Formation versus destruction: the evolution of the star cluster population in galaxy mergers
J. M. Diederik Kruijssen, F. Inti Pelupessy, Henny J. G. L. M. Lamers +3
(Abridged) Interacting galaxies are well-known for their high star formation rates and rich star cluster populations, but the rapidly changing tidal field can also efficiently dest…
The evolution of embedded star clusters
F. I. Pelupessy, S. Portegies Zwart
We study the evolution of embedded clusters. The equations of motion of the stars in the cluster are solved by direct N-body integration while taking the effects of stellar evoluti…
Multi-physics simulations using a hierarchical interchangeable software interface
Simon Portegies Zwart, Stephen McMillan, Inti Pelupessy +1
We introduce a general-purpose framework for interconnecting scientific simulation programs using a homogeneous, unified software interface. Our framework is intrinsically parallel…
The escape of ionising radiation from high-redshift dwarf galaxies
Jan-Pieter Paardekooper, Federico I. Pelupessy, Gabriel Altay +1
The UV escape fraction from high-redshift galaxies plays a key role in models of cosmic reionisation. Because it is currently not possible to deduce the escape fractions during the…
Modeling the formation and evolution of star cluster populations in galaxy simulations
J. M. Diederik Kruijssen, F. Inti Pelupessy, Henny J. G. L. M. Lamers +2
(Abridged) The formation and evolution of star cluster populations are related to the galactic environment. Cluster formation is governed by processes acting on galactic scales, an…
Deviations from the Schmidt-Kennicutt relations during early galaxy evolution
Padelis P. Papadopoulos, Federico I. Pelupessy
We utilize detailed time-varying models of the coupled evolution of stars and the HI, H_2, and CO-bright H_2 gas phases in galaxy-sized numerical simulations to explore the evoluti…
Molecular gas, CO, and star formation in galaxies: emergent empirical relations, feedback, and the evolution of very gas-rich systems
Federico I. Pelupessy, Padelis P. Papadopoulos
We use time-varying models of the coupled evolution of the HI, H_2 gas phases and stars in galaxy-sized numerical simulations to: a) test for the emergence of the Kennicutt-Schmidt…
How rapidly do supermassive black hole "seeds" grow at early times?
Federico I. Pelupessy, Tiziana Di Matteo, Benedetta Ciardi
We investigate the physical conditions for the growth of intermediate mass seed black holes assumed to have formed from remnants of the first generation of massive stars. We follow…