暴涨中粒子的生成对大尺度宇宙微波背景各向异性功率谱的影响
发布时间：2019-07-01 08:39
【摘要】：WMAP(Wilkinson Microwave Anisotropy Probe)观测得到的宇宙微波背景(CMB)角功率谱在大尺度上比广泛使用的ACDM宇宙模型给出的理论值有明显的压低.通过引入暴涨中粒子的生成过程,研究了大尺度上CMB各向异性功率谱的行为.计算表明,粒子的生成使得暴涨的原初功率谱产生了修正,从而影响了CMB的角功率谱,这样可以较为自然地得到四极矩附近的压低.
[Abstract]:The (CMB) angular power spectrum of cosmic microwave background observed by WMAP (Wilkinson Microwave Anisotropy Probe) is obviously lower than the theoretical value given by the widely used ACDM cosmic model on a large scale. By introducing the process of particle formation in surge, the behavior of CMB anisotropy power spectrum on a large scale is studied. The calculation shows that the original power spectrum of the surge is modified by the formation of particles, which affects the angular power spectrum of CMB, so that the suppression near the quadrupole moment can be obtained more naturally.
【作者单位】： 中国科学院紫金山天文台;中国科学院研究生院;
【基金】：国家自然科学基金(10973039,10447114) 江苏省博士后科研资助计划项目(2005年度第1批B类)资助
【分类号】：P159
，
本文编号：2508337
[Abstract]:The (CMB) angular power spectrum of cosmic microwave background observed by WMAP (Wilkinson Microwave Anisotropy Probe) is obviously lower than the theoretical value given by the widely used ACDM cosmic model on a large scale. By introducing the process of particle formation in surge, the behavior of CMB anisotropy power spectrum on a large scale is studied. The calculation shows that the original power spectrum of the surge is modified by the formation of particles, which affects the angular power spectrum of CMB, so that the suppression near the quadrupole moment can be obtained more naturally.
【作者单位】： 中国科学院紫金山天文台;中国科学院研究生院;
【基金】：国家自然科学基金(10973039,10447114) 江苏省博士后科研资助计划项目(2005年度第1批B类)资助
【分类号】：P159
，
本文编号：2508337
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