英亚体育

英亚体育 ?>?學術活動 ?>?學術報告
學術活動
學術報告
High resolution radio observations of transients
報告題目: High resolution radio observations of transients
報?告? 人: 安濤 上海天文臺
報告時間: 2020-10-22 16:00:00
報告地點: Hall 212, Astronomy Building

Abstract: Development of time-domain astronomy has been accelerated in recent years, owing to the advance of wide-field optical and radio surveys, as well as applications of new observing techniques that have led to the discoveries of gravitational waves and neutrinos of extragalactic origin. The properties and the nature of many of the new classes of transient sources remain unclear, which are found to be associated with peculiar supernovae, mergers of compact (NS-NS) objects, or tidal disruption events. Another interesting class of short-term transients uniquely observed in radio band is Fast Radio Bursts (FRBs), discovered only ten years ago. Nowadays, the detection is boosted by a factor of 10 with the SKA pathfinders (e.g., ASKAP, CHIME), enabling breakthrough in FRB study. However, the physical origin of FRB remains obscure. One of the mysteries in the transient study is the accurate localization and their physical association with counterparts at other bands. Very long baseline interferometry (VLBI) offers the highest angular resolution among the current astronomical observational techniques, thus plays a vital role in exploring the physical nature of transients and tracing their structural evolution. I will report an overview df the recent high-resolution observations of transients using VLBI. All these prompt to broaden the understanding of fundamental physics.


Bio:

安濤研究員于2004年在上海天文臺獲得天體物理博士學位,之后在上海天文臺工作至今。現任射電天文科學與技術研究室副主任。主要研究領域包括活動星系核、暫現源、射電天文技術與方法,近期在高紅移類星體和暫現源的高分辨率觀測研究中取得了一些進展。擔任SKA區域中心委員會中方代表,建成中國SKA區域中心原型機,將人工智能技術用于天文大數據處理取得顯著成果。