Reconciling CMB and structure growth measurements with dark energy interactions

被引：155
作者：
Pourtsidou, Alkistis [1 ]
Tram, Thomas [1 ]
机构：
[1] Univ Portsmouth, Inst Cosmol & Gravitat, Dennis Sciama Bldg,Burnaby Rd, Portsmouth PO1 3FX, Hants, England
来源：
PHYSICAL REVIEW D | 2016年 / 94卷 / 04期
关键词：
CONSTRAINTS; COSMOLOGY; TELESCOPE; GALAXIES; CFHTLENS;
D O I：
10.1103/PhysRevD.94.043518
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study a coupled quintessence model with pure momentum exchange and present the effects of such an interaction on the cosmic microwave background (CMB) and matter power spectrum. For a wide range of negative values of the coupling parameter beta structure growth is suppressed and the model can reconcile the tension between cosmic microwave background observations and structure growth inferred from cluster counts. We find that this model is as good as Lambda CDM for CMB and baryon acoustic oscillation data, while the addition of cluster data makes the model strongly preferred, improving the best-fit chi(2) value by more than 16.
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页数：10
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