MUSIC: MUlti-Scale Initial Conditions

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MUSIC: MUlti-Scale Initial Conditions

Post by owlice » Sat Nov 30, 2013 10:28 pm

MUSIC: MUlti-Scale Initial Conditions

Abstract: MUSIC generates multi-scale initial conditions with multiple levels of refinements for cosmological ‘zoom-in’ simulations. The code uses an adaptive convolution of Gaussian white noise with a real-space transfer function kernel together with an adaptive multi-grid Poisson solver to generate displacements and velocities following first- (1LPT) or second-order Lagrangian perturbation theory (2LPT). MUSIC achieves rms relative errors of the order of 10−4 for displacements and velocities in the refinement region and thus improves in terms of errors by about two orders of magnitude over previous approaches. In addition, errors are localized at coarse-fine boundaries and do not suffer from Fourier space-induced interference ringing.

Credit: Hahn, Oliver; Abel, Tom


Bibcode: 2013ascl.soft11011H

ID: ascl:1311.011
Last edited by Ada Coda on Wed Sep 30, 2020 2:08 am, edited 1 time in total.
Reason: Updated code entry.
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