Probing the time dependence of dark energy

被引：25

作者：

Barboza, Edesio M., Jr. ^{[1
,2
]}

Alcaniz, J. S. ^{[2
]}

机构：

[1] Univ Estado Rio Grande do Norte, Dept Fis, Mossoro, Brazil

[2] Observ Nacl, Dept Astron, Rio De Janeiro, Brazil

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2012年 / 02期

关键词：

dark energy theory; supernova type Ia - standard candles; dark energy experiments; BARYON ACOUSTIC-OSCILLATIONS; SUPERNOVA LEGACY SURVEY; EQUATION-OF-STATE; DEEP DEEP SURVEY; COSMOLOGICAL CONSTANT; WMAP OBSERVATIONS; CONSTRAINTS; GALAXY; PARAMETERS; COMPONENT;

D O I：

10.1088/1475-7516/2012/02/042

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A new method to investigate a possible time-dependence of the dark energy equation of state w is proposed. We apply this methodology to a combination of data involving one of the most recent type Ia supernova sample (SNLS3) along with the current baryon acoustic oscillation and H(z) measurements. We show that current observations cannot rule out a non-evolving dark energy component (dw/dz = 0). The approach developed here reduces considerably the so-called smearing effect on w determinations and may be useful to probe a possible evolving dark energy component when applied to upcoming observational data. © 2012 IOP Publishing Ltd and SISSA.

引用

页数：10

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