宇宙学CDM暗晕的N-body模拟 II velocity anisotropy 0.6 arXiv: 0810.1522 MNrAs Highest resolution 0.4 >0 0.2 N=1.074×109 m2=1.250×103M。/h00 M=1.343×1012M。/h log r [kpc/h]
11 宇宙学CDM暗晕的N-body模拟 -- II. velocity anisotropy arXiv:0810.1522, MNRAS Highest resolution
宇宙学CDM暗晕的N-body模拟 III velocity dispersion 5.0 Aq-A-1 arXiv:0810.1522 AC-A Aq-A-3 4.8F Aq-A-4 A4-A-5 说明: 且46 径向速度弥散,连同 速度分布的各向异性, 意味着没有统一的, 整体的温度定义 2 og r [kpc/h
12 宇宙学CDM暗晕的N-body模拟 -- III. velocity dispersion arXiv:0810.1522 说明： 径向速度弥散，连同 速度分布的各向异性， 意味着没有统一的， 整体的温度定义
宇宙学CDM暗晕的N-body模拟 IV pseudo-phase space density /o3∝xr-1.875 arXiv:0810.1522 Bertschinger,s Solution: r 个 Aq -A-1 日2 AAAA q-A-2 q-A-3 q Total Velocity Dispersion 个 Radial velocity Dispersion 04 0.2 0.4 best fit r lm(r<r.) AAAA log r [kpc/h] log r[kpc/h
13 宇宙学CDM暗晕的N-body模拟 -- IV. pseudo-phase space density arXiv:0810.1522
CDM暗晕经验规律-物理起源 迄今为止: 有十几个关于 density profile及其普适性的解释, dynamical models,比如 mergers; 没有对 velocity anisotropy和 velocity dispersion 起源的解释; 没有对 pseudo-phase-space density起源的解释。 因为现在的结果倾向于普适性有所破坏,所以更 没有解释了
14 CDM暗晕经验规律 -- 物理起源 ◼ 迄今为止： ◼ 有十几个关于density profile及其普适性的解释， dynamical models, 比如mergers; ◼ 没有对velocity anisotropy和velocity dispersion 起源的解释； ◼ 没有对pseudo-phase-space density起源的解释。 ◼ 因为现在的结果倾向于普适性有所破坏，所以更 没有解释了
An example by simon D M. white a The universal density profile " is a fixed point in the process of repeated mergers. (Syer&White 1998, MNRAS,293,337) 11 yeas later: These results indicate that mergers do not play a pivotal role in establishing the universalities, thus contradicting models which explain them as consequences of mergers. (Wang White, 2009, MNRAS,396,709)
15 An example by Simon D.M. White ◼ The universal density profile “is a fixed point in the process of repeated mergers.” (Syer & White, 1998, MNRAS, 293,337); ◼ 11 yeas later: “These results indicate that mergers do not play a pivotal role in establishing the universalities, thus contradicting models which explain them as consequences of mergers.” (Wang & White, 2009, MNRAS, 396, 709)