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Webb Releases Multiwavelength View of the 'Butterfly Star,' Revealing Dust Settling in a Planet-Building Disk

A focused program targets edge-on disks to quantify grain growth and settling.

Overview

  • New imaging of IRAS 04302+2247 combines Webb’s NIRCam and MIRI data with optical observations from the Hubble Space Telescope.
  • The protoplanetary disk spans roughly 65 billion kilometers and lies about 525 light-years away in the Taurus star-forming region.
  • The edge-on orientation exposes a central dark dust lane with twin reflection nebulas that give the system its butterfly-like appearance.
  • Vertical structure measurements show tiny dust grains migrating toward the midplane, offering direct evidence of settling tied to early planet formation.
  • The observations are part of Webb GO program #2562, led by F. Ménard and K. Stapelfeldt, which studies four edge-on disks to track dust evolution.