A team of scientists has used multiple space and ground-based telescopes, including NASA's James Webb Space Telescope, NASA's Fermi Gamma-ray Space Telescope, and NASA's Neil Gehrels Swift Observatory, to observe an exceptionally bright gamma-ray burst, GRB 230307A, and identify the neutron star merger that generated an explosion that created the burst. Webb also helped scientists detect the chemical element tellurium in the explosion's aftermath.
While neutron star mergers have long been theorized as being the ideal"pressure cookers" to create some of the rarer elements substantially heavier than iron, astronomers have previously encountered a few obstacles in obtaining solid evidence.Kilonovae are extremely rare, making it difficult to observe these events. Short gamma-ray bursts , traditionally thought to be those that last less than two seconds, can be byproducts of these infrequent merger episodes.
"This type of explosion is very rapid, with the material in the explosion also expanding swiftly," said Om Sharan Salafia, a co-author of the study at the INAF -- Brera Astronomical Observatory in Italy."As the whole cloud expands, the material cools off quickly and the peak of its light becomes visible in infrared, and becomes redder on timescales of days to weeks."
In this case, the neutron stars remained as a binary system despite two explosive jolts and were kicked out of their home galaxy. The pair traveled approximately the equivalent of the Milky Way galaxy's diameter before merging several hundred million years later.
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