【新华社】我国科研人员提出超长伽马暴成因新解

Core Viewpoint - The gamma-ray burst GRB 250702B, occurring on July 2, 2025, challenges traditional understanding of gamma-ray bursts due to its unique properties and has sparked significant academic debate regarding its origins [1] Group 1: Discovery and Analysis - A research team from the National Key Laboratory of Particle Astrophysics at the Chinese Academy of Sciences utilized new analytical tools to comprehensively search observational data from satellites like Huayan and Jiemu, revealing that the gamma-ray burst lasted for 29 hours, setting a new record for duration [1] - The team also identified unique time-varying characteristics in the accompanying X-ray radiation, contributing to the understanding of this event [1] Group 2: New Model Proposal - Based on their findings, the research team proposed a novel "supernova self-regulating collapse star model," suggesting that the progenitor star of this gamma-ray burst was a supergiant star with a mass significantly greater than that of the Sun [1] - Unlike typical gamma-ray burst progenitors, the collapse of a supergiant can last for several days. As the supergiant exhausts its fuel, its core collapses to form a black hole, which rapidly accretes material from the star's inner layers, generating jets that produce the gamma-ray burst [1] - During the subsequent accretion process, slower jets are produced, emitting X-ray radiation [1]