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Astronomers watched a sleeping neutron star roar back to life

Astronomers tracked a decade of dramatic changes in P13, a neutron star undergoing supercritical accretion. Its X-ray luminosity rose and fell by factors of hundreds while its rotation rate accelerated. These synchronized shifts suggest the accretion structure itself evolved over time. The findings offer fresh clues to how ultraluminous X-ray sources reach such extreme power.

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