Cosmography by GRBs : Gamma Ray Bursts as possible distance indicators

Abstract

A new method to constrain the cosmological equation of state is proposed by using combined samples of gamma-ray bursts (GRBs) and supernovae (SNeIa). The Chevallier-Polarski-Linder parameterization is adopted for the equation of state in order to find out a realistic approach to achieve the deceleration/acceleration transition phase of dark energy models. As results, we find that GRBs, calibrated by SNeIa, could be, at least, good distance indicators capable of discriminating cosmological models with respect to $\Lambda$CDM at high redshift.

6 pages, 4 figures, Dark Energy Conference, Florence 2009

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Cited by in corpus (9)

• Cosmographic analysis of the equation of state of the universe through Padé approximations
• Constraints on Cosmological Models and Reconstructing the Acceleration History of the Universe with Gamma-Ray Burst Distance Indicators
• Calibrating Gamma-Ray Bursts by Using a Gaussian Process with Type Ia Supernovae
• Testing Dark Energy Models with Gamma-Ray Bursts Calibrated from the Observational $H(z)$ Data through a Gaussian Process
• The emission of Gamma Ray Bursts as a test-bed for modified gravity
• Constraints on Cosmological Models with Gamma-Ray Bursts in Cosmology-Independent Way
• Gamma-Ray Bursts Calibrated from the Observational $H(z)$ Data in Artificial Neural Network Framework
• Latest Cosmological Constraints on Cardassian expansion models including the updated Gamma-ray bursts
• Gamma-Ray Bursts Calibrated by Using Artificial Neural Networks from the Pantheon+ Sample