The Extended Tidal Tails of NGC 7089 (M2)

  title={The Extended Tidal Tails of NGC 7089 (M2)},
  author={Carl J. Grillmair},
  journal={The Astrophysical Journal},
  • C. Grillmair
  • Published 8 March 2022
  • Physics
  • The Astrophysical Journal
Using photometry and proper motions from Gaia Early Data Release 3, we detect a 45° long trailing stellar debris stream associated with the old, metal-poor globular cluster NGC 7089. With a width on the order of 100 pc, the extended stream appears to be as dynamically cold as the coldest known streams found to date. There is some evidence for an extended leading tail extending between 28° and 37° from the cluster, though the greater distance of this tail, combined with proper motions that are… 


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