Power-law parametrized quintessence model
作者： Sohrab Rahvar , M. Sadegh Movahed
DOI: 10.1103/PHYSREVD.75.023512
关键词: Quintessence 、 Type (model theory) 、 Astrophysics 、 Physics 、 Cosmic microwave background 、 Observational cosmology 、 Universe 、 Dark energy 、 Equation of state 、 Age of the universe 、 Nuclear and High Energy Physics
摘要: We propose a simple power-law parametrized quintessence model with time-varying equation of state and obtain corresponding potential this model. This is compared Supernova Type Ia (SNIa) Gold sample data, size baryonic acoustic peak from Sloan Digital Sky Survey (SDSS), the position CMB observations structure formation 2dFGRS survey put constrain on parameters The best fit indicates that at present time w{sub 0}=-1.40{sub -0.65}{sup +0.40} 1{sigma} confidence level. Finally we calculate age universe in compare it old cosmological objects.
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