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High resolution radio observations of transients
报告题目:High resolution radio observations of transients
报 告  人:安涛 上海天文台
报告时间:2020-10-22 16:00:00
报告地点: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:

安涛研究员于2004年在上海天文台获得天体物理博士学位,之后在上海天文台工作至今。现任射电天文科学与技术研究室副主任。主要研究领域包括活动星系核、暂现源、射电天文技术与方法,近期在高红移类星体和暂现源的高分辨率观测研究中取得了一些进展。担任SKA区域中心委员会中方代表,建成中国SKA区域中心原型机,将人工智能技术用于天文大数据处理取得显著成果。