A strange star near a black hole is defying expectations
SMRTR summary
Astronomers studying a red giant star orbiting a black hole in the Gaia BH2 system discovered the star has an unusual history that defies normal stellar evolution. Using starquake vibrations detected by NASA's TESS satellite, researchers found the star appears much older chemically than its actual 5-billion-year age and spins unusually fast for a red giant. These findings suggest the star merged with or absorbed material from another star, providing insights into how quiet black hole systems form and evolve.
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