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The University of Alabama in Huntsville (UAH) has announced that three researchers associated with the UAH Center for Space Plasma and Aeronomic Research (CSPAR) have discovered a gamma-ray burst (GRB) approximately 2.4 billion light-years away in the constellation Sagitta that ranks as the brightest ever observed. Believed to have been triggered by collapse of a massive star, it is accompanied by a supernova explosion, giving birth to a black hole.
WASHINGTON (Dec. 7, 2022) – The recent discovery of a long gamma-ray burst (GRB) triggered by the collision of two neutron stars challenged the scientific consensus on the cause of that cosmic phenomenon. Brendan O’Connor, a sixth-year PhD student in…
While studying the aftermath of a long gamma-ray burst (GRB), two independent teams of astronomers using a host of telescopes in space and on Earth, including the Gemini North telescope on Hawai‘i and the Gemini South telescope in Chile, have uncovered the unexpected hallmarks of a kilonova, the colossal explosion triggered by colliding neutron stars. This discovery challenges the prevailing theory that long GRBs exclusively come from supernovae, the end-of-life explosions of massive stars.
Mientras estudiaban los vestigios de una explosión de rayos gamma (GRB por sus siglas en inglés) que fue detectada en 2021, dos equipos de astrónomos hallaron señales sorprendentes de una fusión de estrellas de neutrón, en vez de la esperada huella de una supernova. Las observaciones realizadas desde telescopios terrestres y espaciales, que incluyeron al telescopio de Gemini Sur en Chile y Gemini Norte en Hawai‘i, desafían la teoría prevaleciente que predice que las GRB de este tipo provienen exclusivamente de una supernova, es decir de la explosión final que acaba con la vida de las estrellas masivas.
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