2018
DOI: 10.1093/mnras/sty2789
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Abstract: We study a novel interacting dark energy − dark matter scenario where the anisotropic stress of the large scale inhomogeneities is considered. The dark energy has a constant equation of state and the interaction model produces stable perturbations. The resulting picture is constrained using different astronomical data aiming to measure the impact of the anisotropic stress on the cosmological parameters. Our analyses show that a non-zero interaction in the dark sector is allowed while a non-interaction scenario… Show more

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Cited by 75 publications
(43 citation statements)
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References 143 publications
(168 reference statements)
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“…However, if we consider the CMB+R19+Pantheon+CC data combination (see the last column of Tab. VIII), we obtain N eff = 3.23 +0 30. −0.29 at 95% CL.4.2.4.…”
mentioning
confidence: 57%
“…However, if we consider the CMB+R19+Pantheon+CC data combination (see the last column of Tab. VIII), we obtain N eff = 3.23 +0 30. −0.29 at 95% CL.4.2.4.…”
mentioning
confidence: 57%
“…The results in Refs. [19,32] show that externally sourced DE anisotropic stress is consistent with zero and that there is still room for a non-vanishing internally sourced DE anisotropic stress. These constraints could be significantly improved with the inclusion of lensing data as well as NC from future galaxy surveys such as Euclid.…”
Section: Introductionmentioning
confidence: 94%
“…Recently, the internally sourced DE anisotropic stress was further studied in the context of interacting DE-DM scenarios in Ref. [32]. The results in Refs.…”
Section: Introductionmentioning
confidence: 99%
“…It has been found that the presence of an interaction in the dark sector could successfully reconcile the long lasting cosmic coincidence problem [3,4,5,6,7]. Following this, a number of investigations in the context of interacting DE -DM models were performed by many investigators [8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43] (also see two review articles in this direction [44,45]). An interesting outcome from the interaction is that, it could naturally explain the phantom dark energy equation-ofstate [46,47,48,49].…”
Section: Introductionmentioning
confidence: 99%