Extended Tidal Tails of IC 4756 detected by {\it Gaia} EDR3

Abstract

We report the discovery of emerged tidal tails around open cluster IC 4756 ($\sim$ 1 Gyr) based on 644 members identified from {\it Gaia} EDR3. Three-dimensional spatial positions, two-dimensional tangential velocities $\left(x,y,z,\kappa \cdot {\mu }_{\alpha }^{\ast }/\varpi ,\kappa \cdot {\mu }_{\delta }/\varpi \right)$ are utilized to determine the co-moving 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 a S-shape in $X^{\prime }{Y}^{\prime }$ space (Cartesian coordinates focused on cluster center). A clean sequence of our members in Color-Absolute-Magnitude Diagram (CAMD) indicates the coeval population and matches perfectly with the PARSEC isochrone with age from Bossini et al. (2019). Mass segregation is detected in this cluster as well. Finally, we derive the tidal radius and core radius of IC 4756 about $12.13$ pc and $4.33\pm 0.75$ pc, respectively.

AJ published version -- https://iopscience.iop.org/article/10.3847/1538-3881/ac1f1f

References in corpus (26)

• The NumPy array: a structure for efficient numerical computation
• Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3
• galpy: A Python Library for Galactic Dynamics
• Gaia Early Data Release 3: The astrometric solution
• Gaia Early Data Release 3: Parallax bias versus magnitude, colour, and position
• Improving PARSEC models for very low mass stars
• Dynamical mass segregation on a very short timescale
• Age determination for 269 $Gaia$ DR2 Open Clusters
• Using the minimum spanning tree to trace mass segregation
• Hunting for open clusters in \textit{Gaia} DR2: $582$ new OCs in the Galactic disc
• YBC, a stellar bolometric corrections database with variable extinction coefficients: an application to PARSEC isochrones
• Extended stellar systems in the solar neighborhood -- V. Discovery of coronae of nearby star clusters
• Extended stellar systems in the solar neighborhood - I. The tidal tails of the Hyades
• Discovery of Tidal Tails in Disrupting Open Clusters: Coma Berenices and a Neighbor Stellar Group
• 3D Morphology of Open Clusters in the Solar Neighborhood with Gaia EDR3: its Relation to Cluster Dynamics
• Praesepe (NGC 2632) and its tidal tails
• Not all stars form in clusters - measuring the kinematics of OB associations with $Gaia$
• The extended halo of NGC 2682 (M 67) from Gaia DR2
• Diagnosing the Stellar Population and Tidal Structure of the Blanco1 Star Cluster
• Different Fates of Young Star Clusters After Gas Expulsion
• Do star clusters form in a completely mass-segregated way?
• Extended stellar systems in the solar neighborhood - III. Like ships in the night: the Coma Berenices neighbor moving group
• Ruprecht 147: a paradigm of dissolving star cluster
• Tidal tails of open star clusters as probes to early gas expulsion I: A semi-analytic model
• Tidal tails in the disintegrating open cluster NGC 752
• The relation of the Alpha Persei star cluster with the nearby stellar stream

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