Reconstructing a non-linear interaction in the dark sector with cosmological observations
Kang, Jiangang1,2,3
AbstractIn this work we model two non-linear directly interacting scenarios in dark sector of the universe with the dimensionless parameter alpha and beta, which dominate the energy exchange between dark energy and dark matter. The central goal of this investigation is to research the interacting model and discuss the cosmological implications based on the current observational datasets. The class of the interaction is generally characterized by a coupling function Q proportional to H(z)rho(x), x denotes the energy density of dark matter or dark energy. The constrained results we obtained indicate that the direct interaction in cosmic dark sector is favored by various observational data and the key effects on CMB power spectrum and linear matter power spectrum appear compared to.CDM standard paradigm. Finally, we discuss in depth the effect of different neutrino mass hierarchy on matter power spectrum and the variation of the ratio of CMB temperature power spectrum C-l(TT) and matter power spectrum P(k) when the Delta N-eff = N-3.046 from 0.5 to 2, respectively. (C) 2021 Elsevier B.V. All rights reserved.
KeywordDark energy Dark matter Cosmological observations Cosmological parameters Neutrinos
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000630235100042
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Document Type期刊论文
Corresponding AuthorKang, Jiangang
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, CAS Key Lab FAST, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
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Kang, Jiangang. Reconstructing a non-linear interaction in the dark sector with cosmological observations[J]. PHYSICS OF THE DARK UNIVERSE,2021,31:11.
APA Kang, Jiangang.(2021).Reconstructing a non-linear interaction in the dark sector with cosmological observations.PHYSICS OF THE DARK UNIVERSE,31,11.
MLA Kang, Jiangang."Reconstructing a non-linear interaction in the dark sector with cosmological observations".PHYSICS OF THE DARK UNIVERSE 31(2021):11.
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