Echo of interactions in the dark sector

被引：178

作者：

Kumar, Suresh ^{[1
]}

Nunes, Rafael C. ^{[2
]}

机构：

[1] BITS Pilani, Dept Math, Pilani Campus, Pilani 333031, Rajasthan, India

[2] Univ Fed Juiz de Fora, Dept Fis, BR-36036330 Juiz De Fora, MG, Brazil

来源：

PHYSICAL REVIEW D | 2017年 / 96卷 / 10期

关键词：

BARYON ACOUSTIC-OSCILLATIONS; COSMOLOGICAL CONSTANT; CONSTRAINTS; NEUTRINOS; LAMBDA; ENERGY; INDEX; MODEL;

D O I：

10.1103/PhysRevD.96.103511

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the observational constraints on an interacting vacuum energy scenario with two different neutrino schemes (with and without a sterile neutrino) using the most recent data from cosmic microwave background (CMB) temperature and polarization anisotropy, baryon acoustic oscillations ( BAO), type Ia supernovae from JLA sample and structure growth inferred from cluster counts. We find that inclusion of the galaxy clusters data with the minimal data combination CMB + BAO + JLA suggests an interaction in the dark sector, implying the decay of dark matter particles into dark energy, since the constraints obtained by including the galaxy clusters data yield a non-null and negative coupling parameter between the dark components at 99% confidence level. We deduce that the current tensions on the parameters H-0 and sigma(8) can be alleviated within the framework of the interacting as well as noninteracting vacuum energy models with sterile neutrinos.

引用

页数：10

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