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Chemical fingerprints reveal hidden binary pasts of massive stars

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More than 70% of massive stars are born in close binary systems, where gravitational tugs and mass transfer between companions dramatically alter their evolution. Yet once the interaction ends—whether through mass transfer, merger or the supernova explosion of one partner—the surviving star often appears as a solitary object, hiding its turbulent past. For decades, astronomers have struggled to detect these hidden histories.

Key takeaways

  • 01More than 70% of massive stars are born in close binary systems, where gravitational tugs and mass transfer between companions dramatically alter their evolution.
  • 02Yet once the interaction ends—whether through mass transfer, merger or the supernova explosion of one partner—the surviving star often appears as a solitary object, hiding its turbulent past.
  • 03For decades, astronomers have struggled to detect these hidden histories.
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