Search Results

Relativistic tidal separation of binary stars by supermassive black holes

hannorein/rebound 25 Apr 2024

This discrepancy is particularly pronounced in retrograde encounters, where relativistic simulations predict up to $30\%$ more separation events and an earlier onset of binary separation ($\beta=2$ compared to $2. 5$ in Newtonian simulations, with $\beta$ the impact parameter).

High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology

Revised Architecture and Two New Super-Earths in the HD 134606 Planetary System

hannorein/rebound 30 Jan 2024

In addition, we identify a linear trend in the RV time series, and the cause of this acceleration is deemed to be a newly detected sub-stellar companion at large separation.

Earth and Planetary Astrophysics

Can comets deliver prebiotic molecules to rocky exoplanets?

hannorein/rebound 19 Oct 2023

Impacts onto planets around low-mass stars are found to be very sensitive to the planetary architecture, with the survival of complex prebiotic molecules potentially impossible in loosely-packed systems.

Earth and Planetary Astrophysics

WHFast512: A symplectic N-body integrator for planetary systems optimized with AVX512 instructions

hannorein/rebound 11 Jul 2023

We describe the implementation of the symplectic N-body integrator WHFast512 using Single Instruction Multiple Data (SIMD) parallelism and 512-bit Advanced Vector Extensions (AVX512).

Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics Computational Physics

DMPP-3: confirmation of short-period S-type planet(s) in a compact eccentric binary star system, and warnings about long-period RV planet detections

hannorein/rebound 10 May 2023

We performed dynamical simulations which establish that the previously identified $\sim800$ d RV signal cannot be attributed to an orbiting body.

Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics Solar and Stellar Astrophysics

New Dynamical State and Habitability of the HD 45364 Planetary System

hannorein/rebound 31 Aug 2022

The new orbital solution and dynamical state of the system confirm migration models that predicted near circular orbits as the preferred scenario.

Earth and Planetary Astrophysics

Orbital dynamics of two circumbinary planets around misaligned eccentric binaries

hannorein/rebound 29 Nov 2021

For planets that are highly misaligned with respect to an eccentric orbit binary, there are stationary (non-oscillating) tilt configurations that are generalisations of polar configurations for the single planet case.

Earth and Planetary Astrophysics

REBOUND: An open-source multi-purpose N-body code for collisional dynamics

hannorein/rebound 21 Oct 2011

The performance of the plane-sweep algorithm is superior to a tree code for simulations in which one dimension is much longer than the other two and in simulations which are quasi-two dimensional with less than one million particles.

Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics Dynamical Systems Computational Physics

IAS15: A fast, adaptive, high-order integrator for gravitational dynamics, accurate to machine precision over a billion orbits

hannorein/rebound 16 Sep 2014

The algorithm can handle close encounters and high-eccentricity orbits.

Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics Solar and Stellar Astrophysics Numerical Analysis

WHFast: A fast and unbiased implementation of a symplectic Wisdom-Holman integrator for long term gravitational simulations

hannorein/rebound 2 Jun 2015

We implement symplectic correctors up to order eleven that significantly reduce the energy error.

Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics Numerical Analysis Chaotic Dynamics Computational Physics