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Utilizing the Updated Gamma-Ray Bursts and Type Ia Supernovae to Constrain the Cardassian Expansion Model and Dark Energy
Joint Authors
Wei, Jun-Jie
Ma, Qing-Bo
Wu, Xue-Feng
Source
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-08-24
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
We update gamma-ray burst (GRB) luminosity relations among certain spectral and light-curve features with 139 GRBs.
The distance modulus of 82 GRBs at z > 1.4 can be calibrated with the sample at z ≤ 1.4 by using the cubic spline interpolation method from the Union2.1 Type Ia supernovae (SNe Ia) set.
We investigate the joint constraints on the Cardassian expansion model and dark energy with 580 Union2.1 SNe Ia sample ( z < 1.4 ) and 82 calibrated GRBs’ data ( 1.4 < z ≤ 8.2 ) .
In ΛCDM, we find that adding 82 high- z GRBs to 580 SNe Ia significantly improves the constraint on Ω m - Ω Λ plane.
In the Cardassian expansion model, the best fit is Ω m = 0.2 4 - 0.15 + 0.15 and n = 0.1 6 - 0.52 + 0.30 ( 1 σ ) , which is consistent with the ΛCDM cosmology ( n = 0 ) in the 1 σ confidence region.
We also discuss two dark energy models in which the equation of state w ( z ) is parameterized as w ( z ) = w 0 and w ( z ) = w 0 + w 1 z / ( 1 + z ) , respectively.
Based on our analysis, we see that our universe at higher redshift up to z = 8.2 is consistent with the concordance model within 1 σ confidence level.
American Psychological Association (APA)
Wei, Jun-Jie& Ma, Qing-Bo& Wu, Xue-Feng. 2015. Utilizing the Updated Gamma-Ray Bursts and Type Ia Supernovae to Constrain the Cardassian Expansion Model and Dark Energy. Advances in Astronomy،Vol. 2015, no. 2015, pp.1-12.
https://search.emarefa.net/detail/BIM-1051976
Modern Language Association (MLA)
Wei, Jun-Jie…[et al.]. Utilizing the Updated Gamma-Ray Bursts and Type Ia Supernovae to Constrain the Cardassian Expansion Model and Dark Energy. Advances in Astronomy No. 2015 (2015), pp.1-12.
https://search.emarefa.net/detail/BIM-1051976
American Medical Association (AMA)
Wei, Jun-Jie& Ma, Qing-Bo& Wu, Xue-Feng. Utilizing the Updated Gamma-Ray Bursts and Type Ia Supernovae to Constrain the Cardassian Expansion Model and Dark Energy. Advances in Astronomy. 2015. Vol. 2015, no. 2015, pp.1-12.
https://search.emarefa.net/detail/BIM-1051976
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1051976