NDLI: Revisit of constraints on holographic dark energy: SNLS3 dataset with the effects of time-varying β and different light-curve fitters

Content Provider	Springer Nature Link
Author	Wang, Shuang Geng, JiaJia Hu, YiLiang Zhang, Xin
Copyright Year	2014
Abstract	Previous studies have shown that for the Supernova Legacy Survey three-year (SNLS3) data there is strong evidence for the redshift-evolution of color-luminosity parameter β of type Ia supernovae (SN Ia). In this paper, we explore the effects of varying β on the cosmological constraints of holographic dark energy (HDE) model. In addition to the SNLS3 data, we also use Planck distance prior data of cosmic microwave background (CMB), as well as galaxy clustering (GC) data extracted from Sloan Digital Sky Survey (SDSS) data release 7 and Baryon Oscillation Spectroscopic Survey (BOSS).We find that, for the both cases of using SN data alone and using SN+CMB+GC data, involving an additional parameter of β can reduce χ$^{2}$ by ∼ 36; this shows that β deviates from a constant at 6σ confidence levels. Adopting SN+CMB+GC data, we find that compared to the constant β case, varying β yields a larger fractional matter density Ω$_{ m0}$ and a smaller reduced Hubble constant h; moreover, varying β significantly increases the value of HDE model parameter c, leading to c ≈ 0.8, consistent with the constraint results obtained before Planck. These results indicate that the evolution of β should be taken into account seriously in the cosmological fits. In addition, we find that relative to the differences between the constant β and varying β(z) cases, the effects of different light-curve fitters on parameter estimation are very small.
Starting Page	1
Ending Page	11
Page Count	11
File Format	PDF
ISSN	16747348
Journal	Science in China Series G
Volume Number	58
Issue Number	1
e-ISSN	18691927
Language	English
Publisher	Science China Press
Publisher Date	2014-11-27
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	cosmological constraints holographic dark energy type Ia supernova time-varying β Physics Classical Continuum Physics Astronomy, Observations and Techniques
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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