ON THE STARTING REDSHIFT COSMOLOGICAL SIMULATIONS: FOCUSING ON HALO PROPERTIES

被引:22
作者
Knebe, Alexander [1 ,2 ]
Wagner, Christian [2 ]
Knollmann, Steffen [1 ,2 ]
Diekershoff, Tobias [2 ]
Krause, Fabian [2 ]
机构
[1] Univ Autonoma Madrid, Fac Ciencias, Dept Fis Teor, E-28049 Madrid, Spain
[2] Astrophys Inst Potsdam, D-14482 Potsdam, Germany
关键词
cosmology: theory; dark matter; galaxies: halos; methods: N-body simulations; methods: numerical; N-BODY SIMULATIONS; DARK-MATTER HALOES; INITIAL CONDITIONS; MASS FUNCTION; EVOLUTION; TRANSIENTS; UNIVERSALITY; PROJECT; PROFILE; SPH;
D O I
10.1088/0004-637X/698/1/266
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We systematically study the effects of varying the starting redshift z(i) for cosmological simulations in the highly nonlinear regime. Our primary focus lies with the (individual) properties of dark matter halos-namely the mass, spin, triaxiality, and concentration-where we find that even substantial variations in zi leave only a small imprint, at least for the probed mass range M is an element of [10(10), 10(13)] h(-1) M-circle dot and when investigated at redshift z = 0. We further compare simulations started by using the standard Zel'dovich approximation to runs based upon initial conditions produced with second-order Lagrangian perturbation theory. Here, we observe the same phenomenon, i.e., that differences in the studied (internal) properties of dark matter halos are practically undetectable. These findings are (for the probed mass range) in agreement with other work in the literature. We therefore conclude that the commonly used technique for setting up cosmological simulations leads to stable results at redshift z = 0 for the mass, the spin parameter, the triaxiality, and the concentration of dark matter halos.
引用
收藏
页码:266 / 274
页数:9
相关论文
共 47 条
[1]   Fundamental differences between SPH and grid methods [J].
Agertz, Oscar ;
Moore, Ben ;
Stadel, Joachim ;
Potter, Doug ;
Miniati, Francesco ;
Read, Justin ;
Mayer, Lucio ;
Gawryszczak, Artur ;
Kravtosov, Andrey ;
Nordlund, Ake ;
Pearce, Frazer ;
Quilis, Vicent ;
Rudd, Douglas ;
Springel, Volker ;
Stone, James ;
Tasker, Elizabeth ;
Teyssier, Romain ;
Wadsley, James ;
Walder, Rolf .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2007, 380 (03) :963-978
[2]   Reply to the comment by A.!Dominguez and A.!Knebe on "On the problem of initial conditions in cosmological N-body simulations" [J].
Baertschiger, T ;
Labini, FS .
EUROPHYSICS LETTERS, 2003, 63 (04) :633-634
[3]   A universal angular momentum profile for galactic halos [J].
Bullock, JS ;
Dekel, A ;
Kolatt, TS ;
Kravtsov, AV ;
Klypin, AA ;
Porciani, C ;
Primack, JR .
ASTROPHYSICAL JOURNAL, 2001, 555 (01) :240-257
[4]   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
[5]   Memory of initial conditions in gravitational clustering [J].
Crocce, M ;
Scoccimarro, R .
PHYSICAL REVIEW D, 2006, 73 (06)
[6]   Transients from initial conditions in cosmological simulations [J].
Crocce, Martin ;
Pueblas, Sebastian ;
Scoccimarro, Roman .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2006, 373 (01) :369-381
[7]   NUMERICAL TECHNIQUES FOR LARGE COSMOLOGICAL N-BODY SIMULATIONS [J].
EFSTATHIOU, G ;
DAVIS, M ;
FRENK, CS ;
WHITE, SDM .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1985, 57 (02) :241-260
[8]   THE ORDERED NATURE OF ELLIPTIC GALAXIES - IMPLICATIONS FOR THEIR INTRINSIC ANGULAR MOMENTA AND SHAPES [J].
FRANX, M ;
ILLINGWORTH, G ;
DEZEEUW, T .
ASTROPHYSICAL JOURNAL, 1991, 383 (01) :112-134
[9]   The Santa Barbara cluster comparison project: A comparison of cosmological hydrodynamics solutions [J].
Frenk, CS ;
White, SDM ;
Bode, P ;
Bond, JR ;
Bryan, GL ;
Cen, R ;
Couchman, HMP ;
Evrard, AE ;
Gnedin, N ;
Jenkins, A ;
Khokhlov, AM ;
Klypin, A ;
Navarro, JF ;
Norman, ML ;
Ostriker, JP ;
Owen, JM ;
Pearce, FR ;
Pen, UL ;
Steinmetz, M ;
Thomas, PA ;
Villumsen, JV ;
Wadsley, JW ;
Warrren, MS ;
Xu, G ;
Yepes, G .
ASTROPHYSICAL JOURNAL, 1999, 525 (02) :554-582
[10]   The evolution of substructure - I. A new identification method [J].
Gill, SPD ;
Knebe, A ;
Gibson, BK .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2004, 351 (02) :399-409