Improvements on a unified dark matter model

doi:10.1134/S1063773717100024

	Improvements on a unified dark matter model
	Del Popolo, A.1,2,3; Lee, Xi-Guo 1
刊名	ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS
	2017-10-01
卷号	43 页码:635-643
关键词	cosmology theory large scale structure of Universe galaxies formation
ISSN号	1063-7737
DOI	10.1134/S1063773717100024
英文摘要	We study, by means of a spherical collapse model, the effect of shear, rotation, and baryons on a generalized Chaplygin gas (gCg) dominated universes. We show that shear, rotation, and the baryon presence slow down the collapse with respect to the simple spherical collapse model. The slowing down in the growth of density perturbation is able to solve the instability of the unified dark matter (UDM) models described in previous papers (e.g., Sandvik et al. 2004) at the linear perturbation level, as also shown by a direct comparison of our model with previous results.
资助项目	Chinese Academy of Sciences President's international fellowship initiative[2017 VMA0044]
WOS关键词	SPHERICAL COLLAPSE MODEL ; NONLINEAR DENSITY EVOLUTION ; SECONDARY INFALL MODEL ; ELLIPSOIDAL COLLAPSE ; ENERGY COSMOLOGIES ; GALAXY FORMATION ; CLUSTER SCALES ; SUPERNOVA DATA ; HALOES ; CONSTRAINTS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	MAIK NAUKA/INTERPERIODICA/SPRINGER
WOS记录号	WOS:000412929700001
资助机构	Chinese Academy of Sciences President's international fellowship initiative
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/43246]
专题	中国科学院近代物理研究所
通讯作者	Del Popolo, A.
作者单位	1.Chinese Acad Sci, Inst Modern Phys, POB 31, Lanzhou 730000, Gansu, Peoples R China 2.Univ Catania, Dipartimento Fis & Astron, Viale Andrea Doria 6, I-95125 Catania, Italy 3.INFN, Sez Catania, Via S Sofia, I-95123 Catania, Italy
推荐引用方式 GB/T 7714	Del Popolo, A.,Lee, Xi-Guo. Improvements on a unified dark matter model[J]. ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS,2017,43:635-643.
APA	Del Popolo, A.,&Lee, Xi-Guo.(2017).Improvements on a unified dark matter model.ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS,43,635-643.
MLA	Del Popolo, A.,et al."Improvements on a unified dark matter model".ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS 43(2017):635-643.