Deviations from Spherical Symmetry, Typical Parameters of the Spherical Collapse Model, and Dark Energy Cosmologies
文献类型：期刊论文
| 作者 | Del Popolo, A.1,2,3; Lee, Xiguo2 |
| 刊名 | ASTRONOMY REPORTS
 |
| 出版日期 | 2018-08-01 |
| 卷号 | 62期号:8页码:475-482 |
| ISSN号 | 1063-7729 |
| DOI | 10.1134/S1063772918080012 |
| 通讯作者 | Del Popolo, A.(adelpopolo@oact.inaf.it) |
| 英文摘要 | We study how deviations from spherical symmetry of a system, produced by angular momentum, and shear stress, modify the spherical collapse model parameters, as linear density threshold for collapse of the non-relativistic component (delta(c)) and its virial overdensity (Delta(v)), in Einstein-de Sitter and Lambda CDM models. We modify the spherical collapse model to take account of the shear term and angular momentum term. We find that the non-spherical terms change the non-linear evolution of the system and that the collapse stops "naturally" at the virial radius. Moreover, values of the linear overdensity parameter and of Delta(v) are modified with respect to the standard spherical collapse model. |
| 收录类别 | SCI |
| WOS关键词 | PROBE WMAP OBSERVATIONS ; SECONDARY INFALL MODEL ; NONDISSIPATIVE GRAVITATIONAL TURBULENCE ; MATTER HALOES ; ELLIPSOIDAL COLLAPSE ; DENSITY PROFILES ; ANGULAR-MOMENTUM ; ACCELERATING UNIVERSE ; SURFACE-DENSITY ; GALAXY CLUSTERS |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000440418900001 |
| 出版者 | PLEIADES PUBLISHING INC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2557788 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Del Popolo, A. |
| 作者单位 | 1.Univ Catania, Dipartimento Fis & Astron, Catania, Italy 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou, Gansu, Peoples R China 3.INFN, Sez Catania, Catania, Italy |
| 推荐引用方式 GB/T 7714 | Del Popolo, A.,Lee, Xiguo. Deviations from Spherical Symmetry, Typical Parameters of the Spherical Collapse Model, and Dark Energy Cosmologies[J]. ASTRONOMY REPORTS,2018,62(8):475-482. |
| APA | Del Popolo, A.,&Lee, Xiguo.(2018).Deviations from Spherical Symmetry, Typical Parameters of the Spherical Collapse Model, and Dark Energy Cosmologies.ASTRONOMY REPORTS,62(8),475-482. |
| MLA | Del Popolo, A.,et al."Deviations from Spherical Symmetry, Typical Parameters of the Spherical Collapse Model, and Dark Energy Cosmologies".ASTRONOMY REPORTS 62.8(2018):475-482. |
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来源：寒区旱区环境与工程研究所
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