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N-body simulations of the Carina dSph in MOND [PDF]
Monthly Notices of the Royal Astronomical Society, 2014 The classical dwarf spheroidals (dSphs) provide a critical test for Modified Newtonian Dynamics (MOND) because they are observable satellite galactic systems with low internal accelerations and low, but periodically varying, external acceleration.
Angus, Garry W. +4 more
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N-body simulations for parametrized modified gravity [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT We present MG-evolution, an N-body code simulating the cosmological structure formation for parametrized modifications of gravity. It is built from the combination of parametrized linear theory with a parametrization of the deeply non-linear cosmological regime extrapolated from modified spherical collapse computations that ...
Farbod Hassani, Lucas Lombriser
exaly +4 more sources
On the reliability of N-body simulations [PDF]
Computational Astrophysics and Cosmology, 2015 AbstractThe general consensus in the N-body community is that statistical results of an ensemble of collisional N-body simulations are accurate, even though individual simulations are not. A way to test this hypothesis is to make a direct comparison of an ensemble of solutions obtained by conventional methods with an ensemble of true solutions.
Boekholt, T.C.N., Portegies Zwart, S.F.
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Triaxiality Inhibitors in N-body Simulations [PDF]
The Astrophysical Journal, 2018 Abstract Numerous previous studies have investigated the phenomenon wherein initially spherical N-body systems are distorted to triaxial shapes. We report on an investigation of a previously described orbital instability that should oppose triaxiality.
Eric I. Barnes, Evan Dowling
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Experiences with parallel N-body simulation [PDF]
IEEE Transactions on Parallel and Distributed Systems, 1994 This paper describes our experiences developing high-performance code for astrophysical N-body simulations. Recent N-body methods are based on an adaptive tree structure. The tree must be built and maintained across physically distributed memory; moreover, the communication requirements are irregular and adaptive.
Pangfeng Liu, Sandeep N. Bhatt
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The complexity of N-body simulation [PDF]
, 1993 The n-body simulation problem is stated as follows: Given initial positions and velocities of n particles that have pair-wise force interactions, simulate the movement of these particles so as to determine the positions of the particles at a future time.
John H. Reif, Stephen R. Tate
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Relativistic initial conditions for N-body simulations [PDF]
, 2017 Initial conditions for (Newtonian) cosmological N-body simulations are usually set by re-scaling the present-day power spectrum obtained from linear (relativistic) Boltzmann codes to the desired initial redshift of the simulation.
Crittenden, Robert +5 more
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N-Body Simulation on Hybrid Architectures [PDF]
, 2001 N-body codes are routinely used for simulation studies of physical systems, e.g. in the fields of computational astrophysics and molecular dynamics. Typically, they require only a moderate amount of run-time memory, but are very demanding in computational power.
Sloot, P.M.A. +2 more
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On Distributed Gravitational N-Body Simulations
CoRR, 2022 The N-body problem is a classic problem involving a system of N discrete bodies mutually interacting in a dynamical system. At any moment in time there are N*(N - 1)/2 such interactions occurring. This scaling as N^2 leads to computational difficulties where simulations range from tens of thousands of bodies to many millions.
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The New Horizon Run Cosmological N-Body Simulations [PDF]
, 2011 We present two large cosmological N-body simulations, called Horizon Run 2 (HR2) and Horizon Run 3 (HR3), made using 6000^3 = 216 billions and 7210^3 = 374 billion particles, spanning a volume of (7.200 Gpc/h)^3 and (10.815 Gpc/h)^3, respectively.
Changbom Park +5 more
core +1 more source