Chinese researchers identify black holes as likely source of high-energy component of cosmic ray "knee"
The Large High Altitude Air Shower Observatory (LHAASO) officially released the precise measurements of high-energy gamma radiation from the W51 complex, confirming it as a cosmic-ray accelerator boosting particles up to so-called ultra-high energies (UHE, above 1014 electronvolts). This study also provides key evidence about the cosmic-ray acceleration limit in this complex. The findings, enti...
The Large High Altitude Air Shower Observatory (LHAASO) has accurately measured the cosmic ray all-particle energy spectrum and the mean logarithmic mass in the range of 0.3–30 peta-electronvolts (PeV). It has also discovered an “elbow” feature in the mean logarithmic mass spectrum of cosmic rays. The achievement, “Measurements of All-Particle Energy Spectrum and Mean Logarithmic Mass of Co...
The Large High-Altitude Air Shower Observatory (LHAASO) officially published its first catalog of gamma-ray sources in the Astrophysical Journal Supplement Series on Feb. 27. The first LHAASO catalog contains 90 very-high-energy (VHE) gamma-ray sources, 32 of which are new VHE sources, significantly increasing the number of gamma-ray sources in the VHE band. It also contains 43 ultra-high-energ...
The Large High Altitude Air Shower Observatory (LHAASO) has discovered a giant ultra-high-energy gamma-ray bubble structure in the Cygnus star-forming region, which is the first time in human history that the origin of cosmic rays with energy higher than 10 Peta-Electronvolt (PeV, 1PeV=1015eV) has been discovered. This achievement was officially published in the form of a cover article in Scien...
In recognition of research groups or individuals who have completed or demonstrated significant achievements within the past five years, the Chinese Academy of Sciences (CAS) awarded the 2023 Outstanding Science and Technology Achievement Prize on Dec. 23, 2023. The research group of Large High Altitude Air Shower Observatory (LHAASO) was honored with the 2023 Outstanding Science and Technolog...
The Large High Altitude Air Shower Observatory (LHAASO) has officially released the precise energy spectrum for the highest-energy gamma-ray radiation from Gamma-Ray Burst (GRB) 221009A, the brightest GRB observed to date. This finding challenges the standard radiation model of GRB afterglows, revealing that the intensity of cosmic background light in the infrared band is lower than expected. A...
New research findings on the gamma-ray burst (GRB) named GRB 221009A from the Large High Altitude Air Shower Observatory (LHAASO) were published online by the journal Science on June 8, 2023. The study, entitled "A tera-electronvolt afterglow from a narrow jet in an extremely bright GRB 221009A", was completed by the LHAASO international collaboration.
The Large High Altitude Air Shower Observatory (LHAASO) project, one of China's major national scientific and technological infrastructure facilities, has successfully passed national acceptance and formally gone into operation. LHAASO is a facility focusing on cosmic ray observation and research. It was approved by the National Development and Reform Commission (NDRC) on Dec. 31, 2015. Jointly...
Scientists from the Large High Altitude Air Shower Observatory (LHAASO) have presented roughly 1.5 years of observational data, calculating new limits on the lifetime of heavy dark matter particles that have masses between 10^5 and 10^9 giga-electron volts. The study, entitled “Constraints on heavy decaying dark matter from 570 days of LHAASO observations,” was recently published as a highlig...