北京师范大学学报（自然科学版）2017，Vol.53Issue(5)：536-541,6.DOI:10.16360/j.cnki.jbnuns.2017.05.006
中红移BCG的X射线性质
The X-ray properties of BCG in middle redshift
摘要
Abstract
The origin of X-ray emission in Brightest Cluster Galaxy (BCG) is not clear.Both radio jet model and advection-dominated accretion flows (ADAF) model are possible.It is not clear which model is dominant or whether there is any correlation between these two models.However,not all BCG demonstrate X-ray emission.Therefore,it is important to study X-ray properties of BCG and to elucidate the origin of such X-ray emissions.We therefore considered the redshift bin,0.2＜z＜0.23 and analyzed all 27 clusters (30 BCGs in total) recorded in Chandra archive.According to S/N ≥ 3,6 BCGs showed X-ray emission.No linear correlation was found between flux and luminosity of X-ray and radio.Our work suggests that neither ADAF model nor radio jet model dominates in BCG X-ray emission.关键词
星系团/最亮团星系/孔径测光Key words
cluster/brightest cluster galaxy(BCG)/aperture photometry分类
天文与地球科学引用本文复制引用
杨里岚,余恒..中红移BCG的X射线性质[J].北京师范大学学报（自然科学版）,2017,53(5):536-541,6.基金项目
国家自然科学基金资助项目(10973028,10833005,10878003) （10973028,10833005,10878003）
创新群体项目(10821302) （10821302）
973项目(2007CB815402/403) （2007CB815402/403）
高等学校博士学科点专项科研基金新教师类资助课题(20130003120014) （20130003120014）
中央高校基本科研业务费专项基金资助项目 （）
