Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Boekholt, Tjarda C. N."'
We use analytical and $N$-body methods to study the capture of field stars by gravitating substructures moving across a galactic environment. The majority of stars captured by a substructure move on temporarily-bound orbits that are lost to galactic
Externí odkaz:
http://arxiv.org/abs/2404.19069
Autor:
Trani, Alessandro Alberto, Leigh, Nathan W. C., Boekholt, Tjarda C. N., Zwart, Simon Portegies
Publikováno v:
A&A 689, A24 (2024)
The three-body problem (3BP) poses a longstanding challenge in physics and celestial mechanics. Despite the impossibility of obtaining general analytical solutions, statistical theories have been developed based on the ergodic principle. This assumpt
Externí odkaz:
http://arxiv.org/abs/2403.03247
Autor:
Beckers, Sam J., Poppelaars, Colin M., Ulibarrena, Veronica S., Boekholt, Tjarda C. N., Zwart, Simon F. Portegies
Publikováno v:
A&A 685, A12 (2024)
Located at the core of the Galactic Centre, the S-star cluster serves as a remarkable illustration of chaos in dynamical systems. The long-term chaotic behaviour of this system can be studied with gravitational $N$-body simulations. By applying a sma
Externí odkaz:
http://arxiv.org/abs/2312.08460
Recently we estimated that about 5 percent of supermassive black hole triple systems are fundamentally unpredictable. These gargantuan chaotic systems are able to exponentially magnify Planck length perturbations to astronomical scales within their i
Externí odkaz:
http://arxiv.org/abs/2311.07651
Dynamical chaos is a fundamental manifestation of gravity in astrophysical, many-body systems. The spectrum of Lyapunov exponents quantifies the associated exponential response to small perturbations. Analytical derivations of these exponents are cri
Externí odkaz:
http://arxiv.org/abs/2308.14803
The time step criterion plays a crucial role in direct N-body codes. If not chosen carefully, it will cause a secular drift in the energy error. Shared, adaptive time step criteria commonly adopt the minimum pairwise time step, which suffers from dis
Externí odkaz:
http://arxiv.org/abs/2212.09745
Tidal dissipation plays an important role in the dynamical evolution of moons, planets, stars and compact remnants. The interesting complexity originates from the interplay between the internal structure and external tidal forcing. Recent and upcomin
Externí odkaz:
http://arxiv.org/abs/2209.03955
Close encounters between two bodies in a disc often result in a single orbital deflection. However, within their Jacobi volumes, where the gravitational forces between the two bodies and the central body become competitive, temporary captures with mu
Externí odkaz:
http://arxiv.org/abs/2203.09646
Autor:
Zwart, Simon F. Portegies, Boekholt, Tjarda C. N., Por, Emiel, Hamers, Adrian S., McMillan, Steve L. W.
Publikováno v:
A&A 659, A86 (2022)
In self-gravitating $N$-body systems, small perturbations introduced at the start, or infinitesimal errors that are produced by the numerical integrator or are due to limited precision in the computer, grow exponentially with time. For Newton's gravi
Externí odkaz:
http://arxiv.org/abs/2109.11012
We study the influence of relativity on the chaotic properties and dynamical outcomes of an unstable triple system; the Pythagorean three-body problem. To this end, we extend the Brutus N-body code to include Post-Newtonian pairwise terms up to 2.5 o
Externí odkaz:
http://arxiv.org/abs/2109.07013