Loading...
Please wait, while we are loading the content...
Similar Documents
Supernova Constraints on a holographic dark energy model”, JCAP 0408 (2004) 006
| Content Provider | CiteSeerX |
|---|---|
| Author | Huang, Qing-Guo Gong, Yungui China, P. R. |
| Description | In this paper, we use the type Ia supernova data to constrain the model of holographic dark energy. For d = 1, the best fit result is Ω0 m = 0.25, the equation of the state of the holographic dark energy w0 Λ = −0.91 and the transition between the decelerating expansion and the accelerating expansion happened when the cosmological red-shift was zT = 0.72. If we set d as a free parameter, the best fit results are d = 0.21, Ω0 m = 0.46, w0 Λ = −2.67, which sounds like a phantom today, and the transition redshift is zT = 0.28. March, 2004The type Ia supernova (SN Ia) observations [1,2,3] provide evidence that the expansion of our universe at the present time appears to be accelerating which is due to dark energy with negative pressure. The kinematic interpretation of the relationship between SN Ia luminosity distance and red-shift is most consistent with two distinct epoches of expansion: a recent accelerated expansion and a previous decelerated expansion with a transition around zT ∼ 0.4 between them [3]. This is a generic requirement of a mixed dark matter and dark energy universe. The cosmic background microwave (CMB) observations [4] hint a spatially flat universe. However, the unusual small value of the cosmological constant, which is extremely smaller than the estimate from the effective local quantum field theory, |
| File Format | |
| Language | English |
| Publisher Institution | JCAP 0408 (2004) 013, astro-ph/0404229; “Anthropic Principle Favors the Holographic Dark Energy |
| Access Restriction | Open |
| Subject Keyword | Phantom Today Generic Requirement Flat Universe Dark Energy Universe Negative Pressure Cosmological Red-shift Cosmological Constant Sn Ia Luminosity Distance Effective Local Quantum Field Theory Unusual Small Value Recent Accelerated Expansion Type Ia Supernova Free Parameter Type Ia Holographic Dark Energy Model Present Time Fit Result Mixed Dark Matter Holographic Dark Energy Supernova Constraint Transition Redshift Provide Evidence Kinematic Interpretation Previous Decelerated Expansion Sn Ia Distinct Epoch Cosmic Background Microwave |
| Content Type | Text |
| Resource Type | Article |
