學術通告
2019年度
2018年度
2017年度
2016年度
2015年度
2014年度
2013年度
2012年度
2011年度
2010年度
規章制度
通知公告
·2019年度云南省科學技術獎勵擬提名項目公示 (2019-05-22)
·中國科學院云南天文臺2019年舉辦“七彩云南天文之旅”大學生暑期夏令營通知 (2019-05-21)
·中國科學院云南天文臺2018-2019學年優秀學生初選名單公示 (2019-05-10)
·中國科學院云南天文臺2019年大學生暑期實習(理論與計算太陽物理方向)招生通知 (2019-04-29)
·中國科學院云南天文臺2018-2019學年優秀學生評選通知 (2019-04-19)
·關于做好2019年度中國科學院院長獎學金初選工作的通知 (2019-04-17)
·中國科學院云南天文臺食堂原材料供應商遴選公告 (2019-04-04)
·關于做好2019年度中國科學院優秀博士學位論文初選工作的通知 (2019-04-01)
·關于轉發《國務院關于優化科研管理提升科研績效若干措施的通知》及《科技部辦公廳 財政部辦公廳關于開展解決科研經費“報銷繁”有關工作的通知》的通知 (2019-03-01)
·關于做好2019年國家建設高水平大學公派研究生項目選派工作的通知 (2019-02-02)
您現在的位置:首頁 > 新聞資訊 > 學術通告 > 2019年度
【云臺學術報告】2019年6月5日(星期三)下午3:00—4:00 主樓427會議室
2019-06-03  |  作者:  |  【  】 【打印】 【關閉

【學術報告】

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 

報告題目:Probing black hole mass, spin and general relativistic effects in tidal disruption flares

報告人:余文飛教授(Prof. Dr. Wenfei Yu)

報告人單位:上海天文臺(Shanghai Astronomical Observatory)

報告時間:2019年6月5日(星期三)下午3:00—4:00

報告地點:主樓427會議室

報告語言:中文

報告摘要: 

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

When normal stars run close enough to previously dormant supermassive black holes (SMBHs) at the centers of normal galaxies, they would be entirely or partly disrupted due to the tidal force of the central SMBH, leading to the so-called tidal disruption events (TDEs). Part of the debris of the disrupted stars will be accreted by the SMBHs afterwards and generate accretion flares usually in the optical, UV band, and X-ray band. These flares provide great opportunities to probe those dormant SMBHs at the centers of normal galaxies, which represent the majority of SMBHs in our universe. Here we show predicted relativistic line features and the spectral line evolution expected to occur during the accretion phase of the debris material. These spectral line features are imprints of the mass and the spin of the previously dormant SMBHs while bring clues to the geometry and properties of the accretion flow, providing unique probes of the general relativistic Lense-Thirring precession and the Bardeen-Petterson effect expected in TDEs.  In the next decade, sensitive wide field-of-view monitoring in the radio band with the SKA or the ngVLA will be able to detect jet activities due to the accretion of the debris flow of disrupted stars onto the SMBH at the very early stage when the mass accretion rate onto the SMBHs is very low, allowing us to probe mass and spin of those dormant SMBHs and detect general relativistic effects through follow-up X-ray observations. 

---------

Dr. Wenfei Yu is leading the observational high energy astrophysics group at Shanghai Astronomical Observatory. Making use of both space and ground observational facilities such as XMM-Newton, Swift, HXMT, and JVLA, etc., as well as publicly available X-ray all-sky monitors, his research has been focused on phenomena in X-ray binaries in our Galaxy and various high energy and multi-wavelength transients in which accretion physics and relativistic astrophysics are to be addressed. He is a core member of the scientific working groups of the future space missions such as the eXTP and the SVOM, and next generation ground facilities such as the SKA, which are critical to the topic of his talk. 

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

本通知也可以在云臺學術報告網頁看到: 

http://www.ynao.cas.cn/xwzx/xstg/ 

申請安排學術報告的同事請參見臺學術報告管理辦法: 

http://www.ynao.cas.cn/xwzx/xstg/gzzd/ 

云臺邀請團組:大樣本恒星演化研究組、中國科學院天體結構與演化重點實驗室、云南天文臺學術委員會

邀請方聯系人:韓占文(0871-63920139)

6月3日  

 
©2010  中科院云南天文臺    版權所有     滇ICP備05000010號
地址:中國 云南省 昆明市 官渡區 羊方旺396號    郵編:650216    聯系我們
新11选5走势河北