Wed, 2021-05-26 16:00 - 17:00

The first results of LHAASO: Opening The UHE g-ray Astronomy

Zhen Cao for LHAASO Coll.

Institute of High Energy Physics, Beijing, China


The Large High Altitude Air Shower Observatory (LHAASO) as the largest ground based Gamma Ray detector array has the 1/2 array operated for months. Many VHE gamma ray sources has been observed including well known sources such as J1809+06 and Mkr421. With many sources found having strong emission of gamma rays in UHE(> 0.1 PeV) band, LHAASO is opened a completely new window of gamma ray astronomy with its unprecedented sensitivity at energies above 10 TeV and extremely high background rejection capability. It has detected super-PeV gamma-like events, including the record high energy of 1.4 PeV in history. With also measured SEDs of several galactic gamma sources above 100 TeV, LHAASO reveals that our galaxy is full of PeVatrons. This enables an exploring for hadronic PeVatrons which are the origin of the cosmic rays, particularly with the operation of the full scale LHAASO array. The experiment status will be updated.