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MOCCA code for star cluster simulations – IV. A new scenario for intermediate mass black hole formation in globular clusters

Mirek Giersz, Nathan Leigh, Arkadiusz Hypki, Nora Lützgendorf, Abbas Askar
2015 Monthly notices of the Royal Astronomical Society  
MOCCA accurately follows most of the important physical processes that occur during the dynamical evolution of star clusters but, as with other dynamical codes, it approximates the dissipative processes  ...  connected with stellar collisions and binary mergers.  ...  There are two kinds of dynamical collisions: the collision of an incoming star with one binary component (which preserves the binary), and the collision of all interacting stars into one object (i.e. total  ... 
doi:10.1093/mnras/stv2162 fatcat:vpgapdtgrzgbjbczyg6ty7cmsa

Decoherence without entanglement and quantum Darwinism

Guillermo García-Pérez, Dario A. Chisholm, Matteo A. C. Rossi, G. Massimo Palma, Sabrina Maniscalco
2020 Physical Review Research  
evolution.  ...  This dynamical phenomenon goes under the name of environment-induced decoherence [5, 6] .  ... 
doi:10.1103/physrevresearch.2.012061 fatcat:lpee5wagnfcabmuj4kjmhol4sm

Runaway Collisions in Star Clusters [article]

Simon F. Portegies Zwart, Stephen L. W. McMillan
2000 arXiv   pre-print
The calculations are performed on the GRAPE-4 with the starlab software environment which include the dynamical evolution and the nuclear evolution of all stars and binaries.  ...  The collision rate in these models is about 0.00022 collisions per star per Myr for a cluster with an initial relaxation time of 1 Myr.  ...  The back coupling between the stellar evolution and the stellar dynamics is taken into account in a self consistent -object oriented-fashion.  ... 
arXiv:astro-ph/0012237v1 fatcat:srphbm4r7vhvnbeewihbxo6fli

"Ridge" in Proton-Proton Scattering at 7 TeV

K. Werner, Iu. Karpenko, T. Pierog
2011 Physical Review Letters  
This shows that the hydro- figure 1 , but calculation without hydro evolution .i.e. particle production directly from string (flux tube) decay. dynamical evolution "makes" the effect.  ...  This "fluid dynamical behavior" is actually considered to be the major discovery at RHIC. So does pp scattering provide as well a liquid, just ten times smaller than a heavy ion collision?  ... 
doi:10.1103/physrevlett.106.122004 pmid:21517307 fatcat:zvrp55efknblppdkbpig5nu4su

Return of the TEDI: revisiting the Triple Evolution Dynamical Instability channel in triple stars [article]

Adrian S. Hamers, Hagai B. Perets, Todd A. Thompson, Patrick Neunteufel
2021 arXiv   pre-print
Triple-star systems exhibit a phenomenon known as the Triple Evolution Dynamical Instability (TEDI), in which mass loss in evolving triples triggers short-term dynamical instabilities, potentially leading  ...  dynamics and perturbations from passing stars in the field.  ...  PK12 showed that this Triple Evolution Dynamical Instability (TEDI) pathway leads to a comparatively high rate of stellar head-on collisions in the Galaxy, namely on the order of 10 −4 yr −1 , which is  ... 
arXiv:2107.13620v2 fatcat:pzlybbfkwzbpzcpw4wm2itcrsq

Modeling the Evolution of a cluster of gravitating bodies taking into account their absolutely inelastic collisions [article]

Dmitry G. Kiryan, George V. Kiryan
2021 arXiv   pre-print
In solving the problem, the possibility of interbody collisions was taken into account, the collisions being assumed to be absolutely inelastic.  ...  The results obtained within the scope of classical mechanics show that it is possible to represent all the rotation curve variations for the observed galaxies without appealing to the hypothesis of non-observable  ...  Object of the study The object of this study is the galaxy rotation curve that represents orbital velocity distribution of the stars over their distances from the current galaxy center of mass.  ... 
arXiv:1811.06372v5 fatcat:crtjsjrhlzdi3fx2vapeaqicoa

NERD Neurodynamics and Evolutionary Robotics Development Kit [chapter]

Christian Rempis, Verena Thomas, Ferry Bachmann, Frank Pasemann
2010 Lecture Notes in Computer Science  
recurrent neural networks for behavior control, and (3) an extensible evolution framework with a number of neuro-evolution algorithms.  ...  It includes separate libraries (1) for the simulation of arbitrary robots in dynamic environments, allowing the exchange of underlying physics engines, (2) the simulation, manipulation and analysis of  ...  This work was partly funded by EU-Project Number ICT 214856 (ALEAR Artificial Language Evolution on Autonomous Robots.  ... 
doi:10.1007/978-3-642-17319-6_14 fatcat:qrsucuqos5ehfbfzjg5hlcu7ba

A Topology-based Animation Model for the Description of 2D Models with a Dynamic Structure [article]

Pierre-François Léon, Xavier Skapin, Philippe Meseure
2008 Workshop on Virtual Reality Interactions and Physical Simulations  
This paper presents a model that describes the temporal evolution of 2D-topological structures to represent and control dynamic natural phenomena.  ...  We show the efficiency of the model in the geology field, by studying two well-known phenomena, namely sedimentation and erosion.  ...  Topological structure The n-g-maps represent objects by their borders (B-Rep). They model quasi-manifolds, oriented or not, with or without boundary.  ... 
doi:10.2312/pe/vriphys/vriphys08/067-076 dblp:conf/vriphys/LeonSM08 fatcat:mdilzpr3w5frtnwqicouf6uknm

Shapiro conjecture: Prompt or delayed collapse in the head-on collision of neutron stars?

Mark Miller, Wai-Mo Suen, Malcolm Tobias
2001 Physical Review D, Particles and fields  
We study the question of prompt vs. delayed collapse in the head-on collision of two neutron stars.  ...  We thank all present and past members of our NCSA/Potsdam/Wash U team for the joint "Cactus" code development effort, without which this work would not be possible.  ...  In short, as both a thermally supported merged object and a black hole can have the same rest mass and total energy, arguments based solely on conservation of mass and energy without taking the dynamics  ... 
doi:10.1103/physrevd.63.121501 fatcat:ifmaylbgezgstkroxon3dapjpy

Self-Evolution in a Constructive Binary String System

Peter Dittrich, Wolfgang Banzhaf
1998 Artificial Life  
We call the system self-evolving because every variation is performed by the objects themselves in their machine form.  ...  We examine the qualitative dynamics of a catalytic self-organizing reaction system of binary strings that is inspired by the chemical information processing metaphor.  ...  Select two objects s 1 ; s 2 from the soup randomly, without removing them. 2.  ... 
doi:10.1162/106454698568521 pmid:9847424 fatcat:6k4oqmedozearhq47j3w2aj524

Formation and Collisional Evolution of Kuiper Belt Objects [article]

Scott J. Kenyon, Benjamin C. Bromley, David P. O'Brien, Donald R. Davis
2007 arXiv   pre-print
The uncertainties also motivate calculations that combine collisional and dynamical evolution, a 'unified' calculation that should give us a better picture of KBO formation and evolution.  ...  We describe the main predictions of a baseline self-stirring model and show how dynamical perturbations from a stellar flyby or stirring by a giant planet modify the evolution.  ...  evolution and dynamics together.  ... 
arXiv:0704.0259v1 fatcat:nbg4aniqv5awvmmcudns72mpoy

Page 718 of Astronomy and Astrophysics Vol. 320, Issue 3 [page]

1998 Astronomy and Astrophysics  
The present study addresses the dynamical evolution of iso- lated poor clusters as well as the collision of two clusters.  ...  Although theoretical models can describe fairly well and uncover the basic physics of ‘well behaved’ clusters —i.e. objects close to virial equilibrium, without strong substructure — (e.g.  ... 

Localization Dynamics in a Binary Two-Dimensional Cellular Automaton: The Diffusion Rule [chapter]

Genaro J. Martínez, Andrew Adamatzky, Harold V. McIntosh
2010 Game of Life Cellular Automata  
In computational experiments we discover a wide range of mobile and stationary localizations (gliders, oscillators, glider guns, puffer trains, etc), analyze spatio-temporal dynamics of collisions between  ...  We study a two-dimensional cellular automaton (CA), called Diffusion Rule (DR), which exhibits diffusion-like dynamics of propagating patterns.  ...  COLLISIONS BETWEEN LOCALIZED PATTERNS The Diffusion Rule CA combines high-degree unpredictability with enormously rich dynamics of collisions between mobile and stationary objects.  ... 
doi:10.1007/978-1-84996-217-9_16 fatcat:acpxxskdsvef3c6qq5nzwvv2iy

MODEST-1: Integrating stellar evolution and stellar dynamics

Piet Hut, Michael M. Shara, Sverre J. Aarseth, Ralf S. Klessen, James C. Lombardi Jr, Junichiro Makino, Steve McMillan, Onno R. Pols, Peter J. Teuben, Ronald F. Webbink
2003 New Astronomy  
We report here our main conclusions, questions and suggestions for further steps toward integrating stellar evolution and stellar (hydro)dynamics.  ...  The challenge is to define and develop a software framework to enable us to combine in one simulation existing computer codes in stellar evolution, stellar dynamics, and stellar hydrodynamics.  ...  As a concrete example, we focused first on the simplest interface, that between stellar dynamics and stellar evolution, without using hydrodynamics, and without allowing any binaries.  ... 
doi:10.1016/s1384-1076(02)00229-4 fatcat:etpdm4wi3zaqjpd27sfpyvv76a

Dynamic adaptation of broad phase collision detection algorithms

Quentin Avril, Valerie Gouranton, Bruno Arnaldi
2011 2011 IEEE International Symposium on VR Innovation  
Our approach enables to face the unpredictable evolution of the simulation scenario (this includes addition of complex objects, deletion, split into several objects, ...).  ...  In this paper we present a new technique to dynamically adapt the first step (broad phase) of the collision detection process on hardware architecture during simulation.  ...  In I-COLLIDE [5] used "Sweep and Prune", a pseudo-dynamic object collision pruning method that reduced 3D collision detection between AABBs into three separate 1D problems.  ... 
doi:10.1109/isvri.2011.5759599 fatcat:3vfenhuawrhhboqtit2lerfbge
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