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Webb Links Protostellar Bursts to Crystal Formation and Outflows in EC 53

MIRI spectra identified forsterite, enstatite forming in the hot inner disk during outbursts.

Overview

  • A peer-reviewed Nature study uses JWST to provide time-resolved mineral detections in the protostar EC 53 in the Serpens Nebula.
  • EC 53 experiences roughly 18-month accretion bursts lasting about 100 days that heat inner-disk dust enough to crystallize silicates.
  • Observations map layered flows with fast polar jets and broader disk winds that can lift newly formed grains off the disk.
  • Webb data show outflows strong enough to move crystals outward, though survival and delivery to comet-forming regions remain unproven.
  • The findings supply a coherent pathway for crystalline silicates seen in cold comets and suggest the young Sun may have undergone similar bursts.