Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-05-17
Mon.Not.Roy.Astron.Soc.Lett. 372 (2006) L28-L32
Astronomy and Astrophysics
Astrophysics
6 pages, 4 figures included. To appear in MNRAS (available Online Early). Minor corrections after Referee report
Scientific paper
10.1111/j.1745-3933.2006.00219.x
Tight constraints on cosmological parameters can be obtained with standard candles spanning a range of redshifts as large as possible. We propose to treat SN Ia and long Gamma-Ray Bursts (GRBs) as a single class of candles. Taking advantage of the recent release of the Supernova Legacy Survey and {\it the recent finding of a tight correlation among the energetics and other prompt gamma-ray emission properties of GRBs}, we are able to standardize the luminosities/energetics of both classes of objects. In this way we can jointly use GRB and SNIa as cosmological probes to constrain Omega_m and Omega_L and the Dark Energy equation of state parameters through the same Bayesian method that we have, so far, applied to GRBs alone. Despite the large disparity in number (115 SNIa versus 19 GRBs) we show that the constraints on Omega_m and Omega_L are greatly improved by the inclusion of GRBs. More importantly, the result of the combined sample is in excellent agreement with the Lambda-CDM concordance cosmological model and does not require an evolving equation of state for the Dark Energy.
Avila-Reese Vladimir
Firmani Claudio
Ghirlanda Giancarlo
Ghisellini Gabriele
No associations
LandOfFree
The Hubble diagram extended to z>>1: the gamma-ray properties of GRBs confirm the Lambda-CDM model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Hubble diagram extended to z>>1: the gamma-ray properties of GRBs confirm the Lambda-CDM model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Hubble diagram extended to z>>1: the gamma-ray properties of GRBs confirm the Lambda-CDM model will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-678887