Tuesday, September 30, 2025

Astronomers Detect the First "Heartbeat" of a Newborn Star

An image of GRB 230307A with the red dot on the upper left corner being the gamma ray burst's near-infrared afterglow and the galaxy on the lower right corner being its former home galaxy (Credit : NASA/Webb Telescope Team)

Gamma ray bursts are among the most luminous explosions in the universe, briefly outshining entire galaxies in a violent flash of energy. For decades, scientists have debated what powers these incredibly powerful detonations and, to date, the leading candidates have been black holes or highly magnetised neutron stars called magnetars. Distinguishing between the two has proven frustratingly difficult though but a new study has just provided the clearest evidence yet that magnetars can indeed power some of these extreme events, and they did it by detecting something unexpected, the "heartbeat" of a newborn star.



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