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LHAASO and Its First Few Discoveries——Onset of the UHE gamma-ray astronomy
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主讲人: Zhen CAO (Institute of High Energy Physics)
地点: KIAA-auditorium
时间: 2021年9月23日(星期四)15:30-16:30
主持 联系人: Renxin XU
主讲人简介: 1982年,毕业于云南大学物理系 1994年,在高能物理研究所获宇宙线高能物理哲学博士 1994年,任美国俄勒冈大学研究助理 1998年,任美国犹他大学研究助理 2003‐2009年,任美国犹他大学副教授 2004年,中国科学院“引进国外杰出人才”,2008年获“优秀奖” 2004年至今,任高能所粒子天体物理中心研究员,博士生导师 2019年至今,任高能物理研究所天府宇宙线研究中心主任 2015年至今,中国科学院大学岗位教授 2019年起享受国务院政府特殊津贴

The  Large High Altitude Air Shower Observatory (LHAASO) as the largest  ground based Gamma Ray detector array is built up. The 3/4 array has  been operated for months. Many VHE gamma ray sources has been observed  including well known sources such as the Crab and Mkr421. With many  sources found having strong emission of gamma rays in UHE(> 0.1 PeV)  band, LHAASO starts the era of the UHE gamma ray astronomy. With its  unprecedented sensitivity at energies above 10 TeV and extremely high  background rejection capability, super-PeV gamma-like events, including  the record high energy of 1.4 PeV, are detected first time in history.  With also measured SEDs of several galactic gamma sources above 0.1 PeV,  LHAASO reveals that our galaxy is full of PeVatrons. The extreme  features of the electron PeVatron inside the Crab pose strong challenges  to models and even more fundamental theories. Those exciting  discoveries enable an exploring for hadronic PeVatrons which are origins  of cosmic rays. With the operation of the full scale LHAASO array  starting now, more exciting observational results will be highly  anticipated.