Extended Tidal Tails of IC 4756 Detected by Gaia EDR3

We report the discovery of emerged tidal tails around open cluster IC 4756 (similar to 1 Gyr) based on 644 members identified from Gaia EDR3. Three-dimensional spatial positions and two-dimensional tangential velocities (x, y, z, kappa center dot mu(alpha)*/pi, kappa center dot mu(delta)/pi) 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 '

Automated summary

The discovery of emerged tidal tails around open cluster IC 4756 based on 644 members identified from Gaia EDR3, showing two tails extending up to 180 pc in an S shape.