N-body simulations with two-orders-of-magnitude higher performance using wavelets
arXiv:astro-ph/0302343 · doi:10.1046/j.1365-8711.2003.06549.x
Abstract
Noise is a problem of major concern for N-body simulations of structure formation in the early Universe, of galaxies and plasmas. Here for the first time we use wavelets to remove noise from N-body simulations of disc galaxies, and show that they become equivalent to simulations with two orders of magnitude more particles. We expect a comparable improvement in performance for cosmological and plasma simulations. Our wavelet code will be described in a following paper, and will then be available on request.
Mon. Not. R. Astron. Soc., in press. The interested reader is strongly recommended to ignore the low-resolution Fig. 3 (and Fig. 4), and to download the full-resolution paper (700 kb) from http://www.oso.chalmers.se/~romeo/Paper_VI.ps.gz
References in corpus (8)
- Towards optimal softening in 3D N-body codes: I. Minimizing the force error
- Formation and evolution of galactic disks with a multiphase numerical model
- Fundamental Discreteness Limitations of Cosmological N-Body Clustering Simulations
- Two-Body Relaxation in Cosmological Simulations
- Reliability of the dark matter clustering in cosmological N-body simulation on scales below the mean separation length of particles
- Lumpy Structures in Self-Gravitating Disks
- Long-Range Correlations in Self-Gravitating N-Body Systems
- On the problem of initial conditions in cosmological N-body simulations
Cited by in corpus (16)
- Wavelets, ridgelets and curvelets on the sphere
- Chaos and Variance in Galaxy Formation
- Discreteness Effects in Lambda Cold Dark Matter Simulations: A Wavelet-Statistical View
- What drives gravitational instability in nearby star-forming spirals? The impact of CO and HI velocity dispersions
- A wavelet add-on code for new-generation N-body simulations and data de-noising (JOFILUREN)
- Analyzing the Gamma-ray Sky with Wavelets
- A comparative analysis of denoising algorithms for extragalactic imaging surveys
- Multi-scale decomposition of astronomical maps -- a constrained diffusion method
- Wavelet theory applied to the study of spectra of trans-Neptunian objects
- Wavelet treatment of the intra-chain correlation functions of homopolymers in dilute solutions
- The continuous wavelet derived by smoothing function and its application in cosmology
- Statistical detection of patterns in unidimensional distributions by continuous wavelet transforms
- The redshift distribution of absorption-line systems in QSO spectra
- Statistical detection of clumps and gaps in a random sample by continuous wavelet transforms: the 2D case
- Constraining Power of Wavelet vs. Power Spectrum Statistics for CMB Lensing and Weak Lensing with Learned Binning
- A New Wavelet Scattering Transform-Based Statistic for Cosmological Analysis of Large-Scale Structure