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	Deviations from Spherical Symmetry, Typical Parameters of the Spherical Collapse Model, and Dark Energy Cosmologies
	Del Popolo, A.1,2,3; Lee, Xiguo2
刊名	ASTRONOMY REPORTS
	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
出版者	PLEIADES PUBLISHING INC
WOS记录号	WOS:000440418900001
内容类型	期刊论文
URI标识	http://www.corc.org.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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