Zobrazeno 1 - 10
of 1 258
pro vyhledávání: '"Portegies, P."'
Autor:
Wilhelm, Maite, Zwart, Simon Portegies
We present {\sc Venice}, an operator splitting algorithm to integrate a numerical model on a hierarchy of timescales. {\sc Venice} allows a wide variety of different physical processes operating a different scales to be coupled on individual and adap
Externí odkaz:
http://arxiv.org/abs/2407.20332
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 process, however, is important, especially in the earliest stage. Aims: We
Externí odkaz:
http://arxiv.org/abs/2407.19018
We introduce a class of trainable nonlinear operators based on semirings that are suitable for use in neural networks. These operators generalize the traditional alternation of linear operators with activation functions in neural networks. Semirings
Externí odkaz:
http://arxiv.org/abs/2405.18805
Autor:
Forastier, Bruno Rando, Pina, Daniel Marín, Gieles, Mark, Zwart, Simon Portegies, Antonini, Fabio
Dynamical interactions in star clusters are an efficient mechanism to produce the coalescing binary black holes (BBHs) that have been detected with gravitational waves (GWs). We want to understand how BBH coalescence can occur during - or after - bin
Externí odkaz:
http://arxiv.org/abs/2405.16999
Autor:
Polak, Brooke, Mac Low, Mordecai-Mark, Klessen, Ralf S., Zwart, Simon Portegies, Andersson, Eric P., Appel, Sabrina M., Cournoyer-Cloutier, Claude, Glover, Simon C. O., McMillan, Stephen L. W.
Two main mechanisms have classically been proposed for the formation of runaway stars. The binary supernova scenario (BSS) suggests that a massive star in a binary explodes as a supernova, ejecting its companion. The dynamical ejection scenario sugge
Externí odkaz:
http://arxiv.org/abs/2405.12286
Autor:
Trani, Alessandro Alberto, Leigh, Nathan W. C., Boekholt, Tjarda C. N., Zwart, Simon Portegies
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:
Mushtukov, A. A., Ingram, A., Suleimanov, V. F., DiLullo, N., Middleton, M., Tsygankov, S. S., van der Klis, M., Zwart, S. Portegies
Within the magnetospheric radius, the geometry of accretion flow in X-ray pulsars is shaped by a strong magnetic field of a neutron star. Starting at the magnetospheric radius, accretion flow follows field lines and reaches the stellar surface in sma
Externí odkaz:
http://arxiv.org/abs/2402.12965
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
Autor:
Polak, Brooke, Mac Low, Mordecai-Mark, Klessen, Ralf S., Teh, Jia Wei, Cournoyer-Cloutier, Claude, Andersson, Eric P., Appel, Sabrina M., Tran, Aaron, Lewis, Sean C., Wilhelm, Maite J. C., Zwart, Simon Portegies, Glover, Simon C. O., Wang, Long, McMillan, Stephen L. W.
The mode of star formation that results in the formation of globular clusters and young massive clusters is difficult to constrain through observations. We present models of massive star cluster formation using the Torch framework, which uses AMUSE t
Externí odkaz:
http://arxiv.org/abs/2312.06509
Autor:
Hochart, Erwan, Zwart, Simon Portegies
Publikováno v:
A&A 685, A123 (2024)
Aims: Investigate properties of a cluster of intermediate-mass black holes surrounding a supermassive black hole. Methods: We simulate clusters of equal-mass intermediate-mass black holes ($m_{\rm{IMBH}} = 10^{3}$ ${\rm{M_\odot}}$) initialised in a s
Externí odkaz:
http://arxiv.org/abs/2312.05351