A test of the particle paradigm in N-body simulations

被引：32

作者：

Kuhlman, B

Melott, AL

Shandarin, SF

机构：

[1] Department of Physics and Astronomy, University of Kansas, Lawrence

来源：

ASTROPHYSICAL JOURNAL | 1996年 / 470卷 / 01期

基金：

美国国家航空航天局; 美国国家科学基金会;

关键词：

cosmology; miscellaneous; dark matter; gravitation; hydrodynamics; methods; numerical;

D O I：

10.1086/310298

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present results of tests of the evolution of small ''fluid elements'' in cosmological N-body simulations, to examine the validity of their treatment as particles. We find that even very small elements typically collapse along one axis while expanding along another, often to twice or more their initial comoving diameter. This represents a possible problem for high-resolution uses of such simulations.

引用

收藏

页码：L41 / L44

页数：4

相关论文

共 11 条

[1] How filaments of galaxies are woven into the cosmic web [J].

Bond, JR ;

Kofman, L ;

Pogosyan, D .

NATURE, 1996, 380 (6575) :603-606

[2] TESTING APPROXIMATIONS FOR NONLINEAR GRAVITATIONAL CLUSTERING [J].

COLES, P ;

MELOTT, AL ;

SHANDARIN, SF .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1993, 260 (04) :765-776

[3] SOFTENED LAGRANGIAN HYDRODYNAMICS FOR COSMOLOGY [J].

GNEDIN, NY .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1995, 97 (02) :231-257

[4] PRIMORDIAL FLUCTUATIONS AND NONLINEAR STRUCTURE [J].

LITTLE, B ;

WEINBERG, DH ;

PARK, C .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1991, 253 (02) :295-306

[5] CONTROLLED EXPERIMENTS IN COSMOLOGICAL GRAVITATIONAL CLUSTERING [J].

MELOTT, AL ;

SHANDARIN, SF .

ASTROPHYSICAL JOURNAL, 1993, 410 (02) :469-481

[6] GENERATION OF LARGE-SCALE COSMOLOGICAL STRUCTURES BY GRAVITATIONAL CLUSTERING [J].

MELOTT, AL ;

SHANDARIN, SF .

NATURE, 1990, 346 (6285) :633-635

[7] THE SHAPE OF THE FIRST COLLAPSED OBJECTS [J].

SHANDARIN, SF ;

MELOTT, AL ;

MCDAVITT, K ;

PAULS, JL ;

TINKER, J .

PHYSICAL REVIEW LETTERS, 1995, 75 (01) :7-10

[8] A nested-grid particle-mesh code for high-resolution simulations of gravitational instability in cosmology [J].

Splinter, RJ .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1996, 281 (01) :281-293

[9]

SUISALU I, 1996, IN PRESS MNRAS

[10] Universality of the network and bubble topology in cosmological gravitational simulations [J].

Yess, C ;

Shandarin, SF .

ASTROPHYSICAL JOURNAL, 1996, 465 (01) :2-13