Extended Tidal Tails of IC 4756 Detected by Gaia EDR3

  title={Extended Tidal Tails of IC 4756 Detected by Gaia EDR3},
  author={Xianhao Ye and Jinkun Zhao and Jiajun Zhang and Yong Yang and Gang Zhao},
  journal={The Astronomical Journal},
We report the discovery of emerged tidal tails around open cluster IC 4756 (∼1 Gyr) based on 644 members identified from Gaia EDR3. Three-dimensional spatial positions and two-dimensional tangential velocities x,y,z,κ·μα*/ϖ,κ·μδ/ϖ are utilized to determine the comoving member candidates of IC 4756. Using a Bayesian method, we correct the distance for each cluster member. Two tidal tails extend up to 180 pc and display an S shape in the X′Y′ space (Cartesian coordinates focused on cluster center… 


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