摘要
构建暗物质与暗能量参数化的统一模型.通过利用与哈勃参数相关的关系式(4),我们给出了一个能统一暗物质与暗能量的参数化的态方程.由此方程出发,导出了相关的一些宇宙学量与红移量之间的关系.通过计算,我们发现暗能量态参数和减速因子的现在值ω0DE,q0以及转换红移zT与超新星观测数据的结果符合得很好.进一步,通过分析暗能量未来的演化趋势,否定了宇宙大劈裂(Big Rip)的命运.
The unified Parametrized model for dark matter and dark energy is constructed in this paper. By considering a ansatz for Eq. （4） related to the Hubble parameter, the unified parametrized equation of state is obtained and the corresponding relations between cosmological quantities and redshift z are gained on the basis of this equation. By calculation, the present value of dark energyand the present value of deceleration parameter as well as the transition redshift are compatible with supernova observations. In addition, the fate of Big Rip of universe is denied by analyzing the future evolution of dark energy in our manner.
出处
《辽宁师范大学学报（自然科学版）》
CAS
北大核心
2005年第4期410-413,共4页
Journal of Liaoning Normal University:Natural Science Edition
基金
国家自然科学基金资助项目(10475036)
辽宁省自然科学基金资助项目(20032102)
关键词
暗物质
暗能量
态方程
dark matter
dark energy
equation of state
