4.6 Article

Interacting model of new agegraphic dark energy: observational constraints and age problem

期刊

SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
卷 54, 期 8, 页码 1367-1377

出版社

SCIENCE PRESS
DOI: 10.1007/s11433-011-4382-1

关键词

agegraphic dark energy; interacting dark energy model; observational constrains; cosmic age problem

资金

  1. National Natural Science Foundation of China [10705041, 10975032]
  2. National Ministry of Education of China

向作者/读者索取更多资源

Many dark energy models fail to pass the cosmic age test because of the old quasar APM 08279+5255 at redshift z = 3.91, the I > CDM model and holographic dark energy models being no exception. In this paper, we focus on the topic of the age problem in the new agegraphic dark energy (NADE) model. We determine the age of the universe in the NADE model by fitting the observational data, including type Ia supernovae (SNIa), baryon acoustic oscillations (BAO) and the cosmic microwave background (CMB). We find that the NADE model also faces the challenge of the age problem caused by the old quasar APM 08279+5255. In order to overcome such a difficulty, we consider the possible interaction between dark energy and dark matter. We show that this quasar can be successfully accommodated in the interacting new agegraphic dark energy (INADE) model at the 2 sigma level under the current observational constraints.

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