KH 15D: A Star Eclipsed by a Large-Scale Dusty Vortex?

  title={KH 15D: A Star Eclipsed by a Large-Scale Dusty Vortex?},
  author={Pierre Barge and Maurice Viton},
  journal={The Astrophysical Journal Letters},
  pages={L117 - L120}
  • P. Barge, M. Viton
  • Published 18 July 2003
  • Physics
  • The Astrophysical Journal Letters
We propose that the large photometric variations of KH 15D are due to an eclipsing swarm of solid particles, trapped in a giant gaseous vortex rotating at ~0.2 AU from the star. The efficiency of the capture-in-vortex mechanism easily explains the observed large optical depth. The weaker opacity at mid-eclipse is consistent with a size segregation and a slow concentration of the particles toward the center of the vortex. This dusty structure must extend over ~ of an orbit to account for the… 
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