X射线冷核星系团研究进展
发布时间：2019-05-09 15:04
【摘要】：冷核是指在一部分X射线星系团中出现的低温高亮的核状结构。冷核星系团在X射线表面亮度轮廓、温度轮廓、中心冷却时间、质量沉积率、熵轮廓等多个方面具有与非冷核星系团截然不同的观测特征。星系团冷核的发现距今已有40年,人们对冷核的认识经历了由冷流模型到稳定冷核模型的转变。但是直到今天,冷核的产生机制和维持条件仍未完全弄清。研究冷核对于理解活动星系核产能机制、星系际元素增丰过程、星系团的形成与演化、大尺度结构形成等众多领域具有非常重要的意义。
[Abstract]:Cold nuclei are low-temperature bright nuclei that appear in some X-ray clusters. The surface brightness profile, temperature profile, central cooling time, mass deposition rate and entropy profile of the cold nuclear cluster are quite different from those of the non-cold nuclear cluster in many aspects, such as the brightness profile, the temperature profile, the central cooling time, the mass deposition rate and the entropy profile of the cold nuclear cluster. It has been 40 years since the discovery of cold nucleus in cluster. People's understanding of cold nucleus has gone through the transformation from cold flow model to stable cold core model. However, until now, the mechanism and maintenance conditions of cold nuclei have not been fully understood. It is of great significance to study the cold nucleus in many fields, such as the productivity mechanism of active galactic nucleus, the enrichment process of intergalactic elements, the formation and evolution of cluster, the formation of large-scale structure and so on.
【作者单位】： 北京师范大学天文系;
【基金】：973计划(2012CB821804) 中央高校基本科研业务费专项资金 北京师范大学自主科研基金
【分类号】：P157.8
[Abstract]:Cold nuclei are low-temperature bright nuclei that appear in some X-ray clusters. The surface brightness profile, temperature profile, central cooling time, mass deposition rate and entropy profile of the cold nuclear cluster are quite different from those of the non-cold nuclear cluster in many aspects, such as the brightness profile, the temperature profile, the central cooling time, the mass deposition rate and the entropy profile of the cold nuclear cluster. It has been 40 years since the discovery of cold nucleus in cluster. People's understanding of cold nucleus has gone through the transformation from cold flow model to stable cold core model. However, until now, the mechanism and maintenance conditions of cold nuclei have not been fully understood. It is of great significance to study the cold nucleus in many fields, such as the productivity mechanism of active galactic nucleus, the enrichment process of intergalactic elements, the formation and evolution of cluster, the formation of large-scale structure and so on.
【作者单位】： 北京师范大学天文系;
【基金】：973计划(2012CB821804) 中央高校基本科研业务费专项资金 北京师范大学自主科研基金
【分类号】：P157.8
【共引文献】
相关硕士学位论文 前1条
1 赵振煜;星系团A2319的多色测光研究[D];南京师范大学;2013年
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