Astronomers have detected fast-repeating radio bursts from a distant galaxy that should not contain the energy to produce these types of signals, challenging current theories about FRB origins.
Astronomers have made a puzzling discovery: fast-repeating radio bursts emanating from a distant galaxy that should be devoid of the energy necessary to produce such signals. Fast radio bursts (FRBs) are sudden, intense flashes of radio waves lasting only milliseconds. Previously, astronomers linked these bursts to young, highly magnetized neutron stars , which release substantial energy during their formation.
However, the dormant galaxy from which these FRBs are originating is believed to contain only old, dead stars. This finding challenges existing theories about the origins of FRBs.Researchers generally expect FRBs to originate within galaxies, specifically in regions where new stars are actively forming. Vishwangi Shah, a PhD student at McGill University, explained to ABC News that the energetic nature of FRBs suggests a link to these star-forming regions. Surprisingly, FRB 20240209A, the specific FRB detected in this study, is located outside the massive ancient elliptical galaxy it's associated with.To pinpoint the source of the FRBs, Shah and her team employed the Canadian Hydrogen Intensity Mapping Experiment (CHIME) telescope. CHIME detected multiple bursts originating from the same location. However, its inability to precisely determine the location led them to combine it with a smaller CHIME-like telescope for more accurate pinpointing. They then utilized the Gemini North telescope in Hawaii to image the region surrounding the FRBs. The Gemini images confirmed the absence of any other galaxies near the FRB, solidifying its association with the dead galaxy. The ancient elliptical galaxy, located 2 billion light-years from Earth and 11.3 billion years old, presents a perplexing puzzle. Shah and her team's discovery challenges our understanding of FRB origins and prompts further exploration into the nature of these enigmatic signals
Astronomy Radio Bursts Fast Radio Bursts Galaxies Frbs Neutron Stars
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