| 摘要: |
| 20世纪末,通过对Ia型超新星的观测,人们发现了宇宙的加速膨胀,这违背了人们关于引力的根本认识.解释这一不可思议的现象成了宇宙学家的首要任务,理论学家提出了各种模型.在众多模型中,规范引力理论由于其坚实的理论背景而备受关注.本文作者主要的研究对象是彭加莱规范引力宇宙学模型,利用解析分析对这类模型进行了详细的研究和讨论.并通过将Ia型超新星的观测数据 与该宇宙学模型的理论预测作对比,给出了模型参数以及系统初值条件的最佳拟合值,同时也给出了参数们相应的置信区间,限定了这类模型的参数选取. |
| 关键词: 修改引力 加速膨胀 超新星 彭加莱规范理论 |
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| 基金项目:上海师范大学创新团队项目(DXL124);上海高校青年教师培养资助计划 (ZZshsf13018);高等学校博士学科点专项科研基金(20133127120003) |
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| The accelerating universe under Poincaré gauge theory of gravtiy |
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AO Xichen
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Shanghai United Center for Astrophysics(SUCA),Shanghai Normal University
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| Abstract: |
| The accelerating expansion was discovered at the end of the last century, which violates humans′ fundamental intuition of gravity. Trying to explaining this weird observational fact became the principal task of cosmologists, who proposed various models. Among these models, gauge theories of gravity , for its solid theoretical foundation, attract widespread attention. In this paper, we study the cosmology based on the Poincaré gauge theory of gravity. We obtain the analytical solution which describes the evolution history of the universe. And we fit these analytical results to the Type Ia Supernova observation data, and obtain the best-fit value for model parameters and initial conditions, and the confidence level of these parameters. |
| Key words: modified gravity theory cosmic acceleration supernova Poincar′e gauge theory |
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