报告题目：Chandra Observational Constraints on the X-ray Mass-Temperature Relation of Galaxy Clusters and Groups out to z~1.4

　　报 告 人：王婧颖（上海交通大学）

　　报告摘要：Mass-temperature relation of galaxy clusters and groups is an important indicator for examining our understanding of the evolution and thermal history of such systems. We present a systematic analysis on the largest sample so far, which consists of more than 300 clusters and groups from the Chandra archival data. We show that the mass-temperature relation of the high- and low-mass parts of the sample can be described with power-law relations with different slopes. We also find that there is a clear trend for cooler systems to have a smaller mass fraction of X-ray emitting gas, which is evident within both r500 and r200. Both phenomena demonstrate that the effects of energy injection are more pronounced in less massive (i.e., cooler) systems.

　　时    间：12月10日（周二）上午10：00

　　地    点：南京大学苏富特大厦一楼会议室

　　报告人简介：王婧颖，女，2013年6月以“星系团和星系群中IGM标定关系的X射线研究及在低频射电观测中的应用”为题获得上海交通大学理学博士学位。主要研究方向为：星系团的X射线、射电观测、宇宙再电离时期探测、微弱信号探测。

　　网站通知：http://astronomy.nju.edu.cn/doctorforum/

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　　                                            南京大学天文与空间科学学院