ASSEMBLY BIAS AND THE DYNAMICAL STRUCTURE OF DARK MATTER HALOS
文献类型：期刊论文
| 作者 | Faltenbacher, Andreas1,2,3; White, Simon D. M.1 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2010 |
| 卷号 | 708期号:1页码:469-473 |
| 关键词 | cosmology: theory dark matter methods: N-body simulations |
| 英文摘要 | Based on the Millennium Simulation we examine assembly bias for the halo properties: shape, triaxiality, concentration, spin, shape of the velocity ellipsoid, and velocity anisotropy. For consistency, we determine all these properties using the same set of particles, namely all gravitationally self-bound particles belonging to the most massive substructure of a given friends-of-friends halo. We confirm that near-spherical and high-spin halos show enhanced clustering. The opposite is true for strongly aspherical and low-spin halos. Further, below the typical collapse mass, M(*), more concentrated halos show stronger clustering, whereas less concentrated halos are less clustered which is reversed for masses above M*. Going beyond earlier work we show that: (1) oblate halos are more strongly clustered than prolate ones; (2) the dependence of clustering on the shape of the velocity ellipsoid coincides with that of the real-space shape, although the signal is stronger; (3) halos with weak velocity anisotropy are more clustered, whereas radially anisotropic halos are more weakly clustered; (4) for all highly clustered subsets we find systematically less radially biased velocity anisotropy profiles. These findings indicate that the velocity structure of halos is tightly correlated with environment. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | ENVIRONMENTAL DEPENDENCE ; MILLENNIUM SIMULATION ; FORMATION TIMES ; GALACTIC HALOS ; MASS FUNCTIONS ; MERGER RATES ; GALAXIES ; HISTORIES ; CLUSTERS ; PROFILE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000272790400044 |
| 源URL | [http://119.78.226.72/handle/331011/26361]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Max Planck Inst Astrophys, D-85741 Garching, Germany 2.Shanghai Astron Observ, MPA SHAO Joint Ctr Astrophys Cosmol, Shanghai 200030, Peoples R China 3.Univ Western Cape, Dept Phys, ZA-7535 Cape Town, South Africa |
| 推荐引用方式 GB/T 7714 | Faltenbacher, Andreas,White, Simon D. M.. ASSEMBLY BIAS AND THE DYNAMICAL STRUCTURE OF DARK MATTER HALOS[J]. ASTROPHYSICAL JOURNAL,2010,708(1):469-473. |
| APA | Faltenbacher, Andreas,&White, Simon D. M..(2010).ASSEMBLY BIAS AND THE DYNAMICAL STRUCTURE OF DARK MATTER HALOS.ASTROPHYSICAL JOURNAL,708(1),469-473. |
| MLA | Faltenbacher, Andreas,et al."ASSEMBLY BIAS AND THE DYNAMICAL STRUCTURE OF DARK MATTER HALOS".ASTROPHYSICAL JOURNAL 708.1(2010):469-473. |
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来源：上海天文台
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