210 citations · 678 across the 40 of their papers we have counts for
13 papers · 1 filter
Star Cluster Ecology VIII. -- Dynamically Forming S-Type and Centauri-like Systems
Erwan Hochart, Simon Portegies Zwart
Aims: To analyse the impact of dynamically formed binaries emerging naturally from various star cluster environments on already established planetary systems. Methods: Numerical si…
Planet-moon ejections in close stellar encounters
Yannick Badoux, Simon Portegies Zwart
Free-floating planet-moon pairs (FFPMs) may form when planetary systems experience close stellar encounters. We quantify moon-retention probabilities and ejection cross sections fo…
Oort Cloud Ecology -- IV. Exchanging Asteroids
Erwan Hochart, Simon Portegies Zwart
Aims. Investigate the influence of cluster environments on asteroids, with special attention towards captured material. Methods. Using numerical methods, a sub-virial fractally dis…
A Systematic North-South asymmetry in the Steady-state Climate of rapidly-rotating Oblique Water Worlds
Y Wu, S. Portegies Zwart, H Dijkstra
Planetary obliquity (axial tilt) plays an important role in regulating the climate evolution and habitability of water-covered planets. Despite the suspicion of large obliquities i…
A Resonant Beginning for the Solar System Terrestrial Planets
Shuo Huang, Chris Ormel, Simon Portegies Zwart +2
In the past two decades, transit surveys have revealed a class of planets with thick atmospheres -- sub-Neptunes -- that must have completed their accretion in protoplanet disks. W…
Stability of a cluster-disrupted mean-motion resonance (chain) in HR 8799 and PDS 70
Brent Maas, Shuo Huang, Simon Portegies Zwart
HR~8799 is a planetary system with four planets potentially in a mean-motion resonance chain. It is unclear from the observations if they are in mean-motion resonance. Similarly, P…
Oort Cloud Ecology. III. The Sun left the parent star cluster shortly after the giant planets formed
Simon Portegies Zwart, Shuo Huang
The Sun was born in a clustered environment with 10,000 other stars. Being an isolated star today, the Sun must have left the nest. We do not directly know when that happened, how…
He awa whiria: the tidal streams of interstellar objects
John C. Forbes, Michele T. Bannister, Chris Lintott +5
Upcoming surveys are likely to discover a new sample of interstellar objects (ISOs) within the Solar System, but questions remain about the origin and distribution of this populati…
On the origin of transition disk cavities: Pebble-accreting protoplanets vs Super-Jupiters
Shuo Huang, Nienke van der Marel, Simon Portegies Zwart
Protoplanetary disks surrounding young stars are the birth places of planets. Among them, transition disks with inner dust cavities of tens of au are sometimes suggested to host ma…
On the suppression of giant planet formation around low-mass stars in clustered environments
Shuo Huang, Simon Portegies Zwart, Maite J. C. Wilhelm
Context: Current exoplanet formation studies tend to overlook the birth environment of stars in clustered environments. The effect of this environment on the planet-formation proce…
Isles of regularity in a sea of chaos amid the gravitational three-body problem
Alessandro Alberto Trani, Nathan W. C. Leigh, Tjarda C. N. Boekholt +1
The three-body problem (3BP) poses a longstanding challenge in physics and celestial mechanics. Despite the impossibility of obtaining general analytical solutions, statistical the…
A hybrid approach for solving the gravitational N-body problem with Artificial Neural Networks
Veronica Saz Ulibarrena, Philipp Horn, Simon Portegies Zwart +3
Simulating the evolution of the gravitational N-body problem becomes extremely computationally expensive as N increases since the problem complexity scales quadratically with the n…
The Formation of Solar System Analogs in Young Star Clusters
Simon Portegies Zwart
The Solar system was once rich in the short-lived radionuclide (SLR) Al\, but deprived in Fe. Several models have been proposed to explain these anomalous abundances…