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A substellar flyby that shaped the orbits of the giant planets
Garett Brown, Renu Malhotra, Hanno Rein
The modestly eccentric and non-coplanar orbits of the giant planets pose a challenge to solar system formation theories which generally indicate that the giant planets emerged from…
Fast Radio Bursts and Interstellar Objects
Dang Pham, Matthew J. Hopkins, Chris Lintott +2
Fast radio bursts (FRBs) are transient radio events with millisecond-scale durations, and debated origins. Collisions between planetesimals and neutron stars have been proposed as…
TRACE: a code for Time-Reversible Astrophysical Close Encounters
Tiger Lu, David M. Hernandez, Hanno Rein
We present TRACE, an almost time-reversible hybrid integrator for the planetary N-body problem. Like hybrid symplectic integrators, TRACE can resolve close encounters between parti…
Polluting White Dwarfs with Oort Cloud Comets
Dang Pham, Hanno Rein
Observations point to old white dwarfs (WDs) accreting metals at a relatively constant rate over 8~Gyrs. Exo-Oort clouds around WDs have been proposed as potential reservoirs of ma…
Satellite Visibility During the April 2024 Total Eclipse
Samantha M. Lawler, Hanno Rein, Aaron C. Boley
On 8 April 2024, tens of millions of people across North America will be able to view a total solar eclipse. Such astronomical events have been important throughout history, but wi…
A new timestep criterion for N-body simulations
Dang Pham, Hanno Rein, David S. Spiegel
We derive a new criterion for estimating characteristic dynamical timescales in N-body simulations. The criterion uses the second, third, and fourth derivatives of particle positio…