Probing the time dependence of dark energy

A new method to investigate a possible timodcpcndcncc 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...

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Bibliographic Details
Published in:Journal of cosmology and astroparticle physics 2012-02, Vol.2012 (2), p.i-9
Main Authors: Barboza, Edesio M, Alcaniz, J S
Format: Article
Language:English
Subjects:
Acoustics
ASTROPHYSICS
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
BARYONS
COSMOLOGY
Dark energy
EQUATIONS OF STATE
Galling
NONLUMINOUS MATTER
OSCILLATIONS
Supernovas
TIME DEPENDENCE
TYPE I SUPERNOVAE
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Summary:A new method to investigate a possible timodcpcndcncc 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.
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2012/02/042