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论文类型：期刊论文

发表时间：2017-07-01

发表刊物：ENTROPY

收录刊物：SCIE、Scopus

卷号：19

期号：7

ISSN号：1099-4300

关键字：dark energy; interaction; observational constraint

摘要：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 = 3H xi (1 + w(x))rho(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 sigma level.