Chinese scientists have identified a gamma-ray spectral line with energy levels peaking at 37 million electron volts, the highest-energy gamma-ray spectral line ever observed from cosmic celestial bodies. The discovery will significantly advance the understanding of gamma-ray bursts (GRBs).
The study, led by researchers from the Institute of High Energy Physics (IHEP), Chinese Academy of Sciences, was published as a cover story in the journal Science China Physics, Mechanics & Astronomy on July 25.
Xiong Shaolin, the leader of the research team, who is also the principal investigator of GECAM series space telescopes at IHEP, noted that these findings hold great significance for studying the physics and mechanisms behind GRBs and relativistic jets launched by GRBs. (Xinhua)
Xiong Shaolin poses for a photo at the Institute of High Energy Physics (IHEP), Chinese Academy of Sciences, Beijing, capital of China, Aug. 11, 2024. (Xinhua/Jin Liwang)
Xiong Shaolin (3rd L) and his students pose for a group photo at the Institute of High Energy Physics (IHEP), Chinese Academy of Sciences, Beijing, capital of China, Aug. 11, 2024. (Xinhua/Jin Liwang)
Dr. LIU Jieying and Prof. MAO Jirong from the Yunnan Observatories utilized the down-Comptonization mechanism and found that it significantly decreased the intensity of the X-ray emission line in GRB and the significance of line detection.
Prof. MAO Jirong and his colleagues from the Yunnan Observatories found that the spectral diversities of Fermi GRBs could be explained by the magnetohydrodynamics (MHD) turbulent cascade using the jitter radiation framework.
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