Can holographic dark energy models fit the observational data?

被引:32
作者
Malekjani, Mohammad [1 ]
Rezaei, Mehdi [2 ,3 ]
Akhlaghi, Iman A. [4 ]
机构
[1] Bu Ali Sina Univ, Dept Phys, Hamadan 65178, Iran
[2] RIAAM, POB 55134-441, Maragha, Iran
[3] Iran Meteorol Org, Hamedan Res Ctr Appl Meteorol, Hamadan 65199, Iran
[4] Inst Adv Studies Basic Sci, Dept Phys, Zanjan 4513766731, Iran
关键词
BARYON ACOUSTIC-OSCILLATIONS; PROBE WMAP OBSERVATIONS; SPHERICAL COLLAPSE MODEL; COSMOLOGICAL CONSTANT; MATTER PERTURBATIONS; GROWTH INDEX; BLACK-HOLES; CONSTRAINTS; COMPONENT; DYNAMICS;
D O I
10.1103/PhysRevD.98.063533
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
In this work we investigate the holographic dark energy models with slowly time-varying model parameter defined based on the current Hubble horizon length scale. While the previous studies on the three popular holographic dark energy models defined based on the future event horizon, Ricci scale and Granda-Oliveros IR cutoffs showed that these models cannot fit the observational data [I. A. Akhlaghi, M. Malekjani, S. Basilakos, and H. Haghi, Mon. Not. R. Astron. Soc. 477, 3659 (2018)], in this work we show that the holographic dark energy models with time-varying model parameter defined on the current Hubble radius are well favored by observations. Using the standard.2 minimization in the context of Markov Chain Monte Carlo method, we compare the ability of holographic dark energy models with timevarying c2 parameter constructed on the current Hubble length scale against different sets of observational data namely expansion data, growth rate data, and expansion thorn growth rate data, respectively. Based on the values of Akaike and Bayesian information criteria, we find that these types of holographic dark energy models are well fitted to both expansion and growth rate observations as equal to.CDM cosmology. We also put constraints on the cosmological parameters and show that the transition epoch form early decelerated to current accelerated expansion calculated in holographic dark energy models with timevarying model parameter defined on the Hubble length is consistent with observations.
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页数:12
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