A relativistic view on large scale N-body simulations
A relativistic view on large scale N-body simulations
复制标题
大规模 N 体模拟的相对论观点
DOI:
10.1088/0264-9381/31/23/234004
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发表时间:
2014
影响因子:
3.5
通讯作者:
W. Valkenburg
中科院分区:
文献类型:
--
作者:
C. Rampf;G. Rigopoulos ;W. Valkenburg
We discuss the relation between the output of Newtonian N-body simulations on scales that approach or exceed the particle horizon to the description of general relativity. At leading order, the Zeldovich approximation is correct on large scales, coinciding with the general relativistic result. At second order in the initial metric potential, the trajectories of particles deviate from the second order Newtonian result and hence the validity of second order Lagrangian perturbation theory initial conditions should be reassessed when used in very large simulations. We also advocate using the expression for the synchronous gauge density as a well behaved measure of density fluctuations on such scales.
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DOI:
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发表时间:
2014
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2013
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