【学术活动预告】Burst probe to XRB accretion and Insight-HXMT observation

发布时间:2018-09-18 南师物理学院 浏览次数:

报告题目:Burst probe to XRB accretion and Insight-HXMT observation

报告人:  张澍 研究员

报告时间:2018919日(星期三)下午4:00

报告地点:行健楼 437会议室

邀请单位:物理科学与技术学院

 

内容简介:

Although corona has been being well used in modelling accretion of XRBs, especially on aspects of the spectral state transitions and correlation with launching of a jet, so far its nature is still less known, especially on aspect of the formation mechanism. To probe this puzzle observationally, one has firstly to have a proper probe like the intense short soft X-ray shower, since the corona is in definition less emissive and can only be lighted up with the incident soft X-rays. This probe, however, falls short in BH XRBs, but fits well the thermal nuclear flashes occurring on the NS surface. We therefore took the type-I burst to probe the accompanied disk/corona evolution and obtained an atoll sample which shows that corona can be cooled off by the burst shower. Further studies suggest that, a variety of issues apart from corona can be addressed as well by taking this probe. The current shortage in observations at hard X-rays is the relatively poor statistics of the data, which can be diminished by the  HXMT mission.

 

 

专家简介:

张澍,中科院高能物理研究所粒子天体物理中心研究员,从事高能天体物理的数据分析和辐射机制的研究,曾担任慧眼-HXMT地面应用系统的副总设计师,现任eXTP项目的首席助理,负责该项目的科学需求分析等工作。目前在慧眼-HXMT项目从事有关硬X射线波段的科学目标方面研究工作。