Researchers studying GRB 221009A, the Brightest of All Time (BOAT) gamma-ray burst, found its jet exhibited an unusual structure, which may explain its extreme nature and prolonged visible afterglow. These findings could challenge standard theories about gamma-ray bursts and shape future studies.
on October 9, 2022, they dubbed it the BOAT, or the brightest-of-all-time. Now, months after its initial burst, scientists studying GRB 221009A describe an unusual structure to the jet of material expelled during the explosion that may explain GRB 221009A’s extreme nature and why its afterglow remained visible for so long after the event.
Learn more about GRB’s and the importance of studying them with Brendan O’Connor, GW graduate student, and lead study author. Credit: The George Washington University “GRB 221009A represents a massive step forward in our understanding of gamma-ray bursts, and demonstrates that the most extreme explosions do not obey the standard physics assumed for garden variety gamma-ray bursts,” Brendan O’Connor, GW graduate student and lead study author, says. O’Connor led the research team that was using the Gemini South Telescope in Chile to observe the event last October.
The findings will drive future studies of gamma-ray bursts and motivate scientists to develop simulations of gamma-ray burst jet structures. “For a long time, we have thought about jets as being shaped like ice cream cones,” says Alexander van der Horst, associate professor of physics at GW and study co-author. “However, some gamma-ray bursts in recent years, and in particular the work presented here, show that we need more complex models and detailed computer simulations of gamma-ray burst jets.”Science Advances
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