Testing the Interacting Dark Energy Model with Cosmic Microwave Background Anisotropy and Observational Hubble Data

Yang, Weiqiang; Xu, Lixin; Li, Hang; Wu, Yabo; Lu, Jianbo

doi:10.3390/e19070327

Open AccessArticle

Testing the Interacting Dark Energy Model with Cosmic Microwave Background Anisotropy and Observational Hubble Data

by

Weiqiang Yang

^1,*,

Lixin Xu

²,

Hang Li

³,

Yabo Wu

¹ and

Jianbo Lu

¹

Department of Physics, Liaoning Normal University, Dalian 116029, China

²

Institute of Theoretical Physics, School of Physics, Dalian University of Technology, Dalian 116024, China

³

College of Medical Laboratory, Dalian Medical University, Dalian 116044, China

^*

Author to whom correspondence should be addressed.

Entropy 2017, 19(7), 327; https://doi.org/10.3390/e19070327

Submission received: 26 May 2017 / Revised: 12 June 2017 / Accepted: 23 June 2017 / Published: 17 July 2017

(This article belongs to the Special Issue Dark Energy)

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Abstract

The coupling between dark energy and dark matter provides a possible approach to mitigate the coincidence problem of the cosmological standard model. In this paper, we assumed the interacting term was related to the Hubble parameter, energy density of dark energy, and equation of state of dark energy. The interaction rate between dark energy and dark matter was a constant parameter, which was,

Q = 3 H ξ (1 + w_{x}) ρ_{x}

. Based on the Markov chain Monte Carlo method, we made a global fitting on the interacting dark energy model from Planck 2015 cosmic microwave background anisotropy and observational Hubble data. We found that the observational data sets slightly favored a small interaction rate between dark energy and dark matter; however, there was not obvious evidence of interaction at the

1 σ

level.

Keywords: dark energy; interaction; observational constraint

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MDPI and ACS Style

Yang, W.; Xu, L.; Li, H.; Wu, Y.; Lu, J. Testing the Interacting Dark Energy Model with Cosmic Microwave Background Anisotropy and Observational Hubble Data. Entropy 2017, 19, 327. https://doi.org/10.3390/e19070327

AMA Style

Yang W, Xu L, Li H, Wu Y, Lu J. Testing the Interacting Dark Energy Model with Cosmic Microwave Background Anisotropy and Observational Hubble Data. Entropy. 2017; 19(7):327. https://doi.org/10.3390/e19070327

Chicago/Turabian Style

Yang, Weiqiang, Lixin Xu, Hang Li, Yabo Wu, and Jianbo Lu. 2017. "Testing the Interacting Dark Energy Model with Cosmic Microwave Background Anisotropy and Observational Hubble Data" Entropy 19, no. 7: 327. https://doi.org/10.3390/e19070327

APA Style

Yang, W., Xu, L., Li, H., Wu, Y., & Lu, J. (2017). Testing the Interacting Dark Energy Model with Cosmic Microwave Background Anisotropy and Observational Hubble Data. Entropy, 19(7), 327. https://doi.org/10.3390/e19070327

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Testing the Interacting Dark Energy Model with Cosmic Microwave Background Anisotropy and Observational Hubble Data

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