Forming Close-in Earth-like Planets Via a Collision-merger Mechanism in Late-stage Planet Formation

  title={Forming Close-in Earth-like Planets Via a Collision-merger Mechanism in Late-stage Planet Formation},
  author={Jianghui Ji and Sheng Jin and China Purple Mountain Observatory and Cas Department of Astrophysics and School of Cosmic Physics and University of Wales and Australia Graduate School of Chinese Academy of Sciences},
  journal={The Astrophysical Journal},
The large number of exoplanets found to orbit their host stars in very close orbits have significantly advanced our understanding of the planetary formation process. It is now widely accepted that such short-period planets cannot have formed in situ, but rather must have migrated to their current orbits from a formation location much farther from their host star. In the late stages of planetary formation, once the gas in the protoplanetary disk has dissipated and migration has halted, gas… Expand

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