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NGC 288 is a Galactic globular cluster having observed extra tidal structure, without confirmed tidal tails. $Gaia$ DR2 provides photometric and astrometric data for many of the stars in NGC 288 and its extra tidal structure. To compare…

Astrophysics of Galaxies · Physics 2019-02-13 Shaziana Kaderali , Jason A. S. Hunt , Jeremy J. Webb , Natalie Price-Jones , Raymond Carlberg

We present a photometric analysis of the rich star cluster population in the tidal tails of NGC 6872. We find star clusters with ages between 1 - 100 Myr distributed in the tidal tails, while the tails themselves have an age of less than…

Astrophysics · Physics 2009-11-10 N. Bastian , M. Hempel , M. Kissler-Patig , N. Homeier , G. Trancho

The tidal tails of stellar clusters provide an important tool for studying the birth conditions of the clusters and their evolution, coupling, and interaction with the Galactic potential. We present the N-body evolution of a Hyades-like…

Astrophysics of Galaxies · Physics 2021-03-24 Tereza Jerabkova , Henri M. J. Boffin , Giacomo Beccari , Guido de Marchi , Jos H. J. de Bruijne , Timo Prusti

Using photometry and proper motions from Gaia Early Data Release 3, we detect a 45 degree-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…

Astrophysics of Galaxies · Physics 2022-04-27 Carl J. Grillmair

We discuss recent observational and numerical work on tidal tails in globular clusters. Evidence of tidal tails has now been found in 16 Galactic globulars and 4 globulars in M31. Simulations indicate that mapping of these tidal tails over…

Astrophysics · Physics 2007-05-23 Carl J. Grillmair

We report the discovery of two well-defined tidal tails emerging from the Hyades star cluster. The tails were detected in Gaia DR2 data by selecting cluster members in the three-dimensional galactocentric cylindrical velocity space. The…

Astrophysics of Galaxies · Physics 2019-01-16 Stefan Meingast , João Alves

We utilize the robust membership determination algorithm, ML-MOC, on the precise astrometric and deep photometric data from Gaia Early Data Release 3 within a region of radius 5$^{\circ}$ around the center of the intermediate-age galactic…

Astrophysics of Galaxies · Physics 2021-05-26 Souradeep Bhattacharya , Manan Agarwal , Khushboo K. Rao , Kaushar Vaidya

We present results on the extra-tidal features of the Milky Way globular cluster NGC 7099, using deep gr photometry obtained with the Dark Energy Camera (DECam). We reached nearly 6 mag below the cluster Main Sequence (MS) turnoff, so that…

Astrophysics of Galaxies · Physics 2020-10-28 A. E. Piatti , J. A. Carballo-Bello , M. D. Mora , C. Cenzano , C. Navarrete , M. Catelan

The dynamical evolution of a single globular cluster and also of the entire Galactic globular cluster system has been studied theoretically in detail. In particular, simulations show how the 'lost' stars are distributed in tidal tails…

Astrophysics of Galaxies · Physics 2015-05-19 Katrin Jordi , Eva K. Grebel

Using the AAOmega instrument of the Anglo-Australian Telescope, we have obtained medium-resolution near-infrared spectra of 10,500 stars in two-degree fields centered on the galactic globular clusters 47 Tuc, NGC 288, M12, M30 and M55.…

Astrophysics · Physics 2009-11-13 L. L. Kiss , P. Szekely , T. R. Bedding , G. A. Bakos , G. F. Lewis

Within a 200 pc sphere around the Sun we search for the Hyades tidal tails in the Gaia DR2 dataset. We use a modified convergent point method to search for stars with space velocities close to the space velocity of the Hyades cluster. We…

Solar and Stellar Astrophysics · Physics 2019-01-09 Siegfried Röser , Elena Schilbach , Bertrand Goldman

Empirical constraints on the internal dynamics of open clusters are important for understanding their evolution and evaporation. High precision astrometry from Gaia DR3 are thus useful to observe aspects of the cluster dynamics. This work…

Astrophysics of Galaxies · Physics 2024-07-03 Vikrant V. Jadhav , Pavel Kroupa , Wenjie Wu , Jan Pflamm-Altenburg , Ingo Thies

We report the discovery of two well-defined tidal tails emerging from the sparse remote globular cluster Palomar 5. These tails stretch out symmetrically to both sides of the cluster in the direction of constant Galactic latitude and…

In the last decade, observational studies have shown the existence of tidal streams in the outer part of many galactic globular clusters. The most striking examples of clusters with well defined tidal tails are represented by Palomar 5 and…

Astrophysics · Physics 2007-05-23 P. Di Matteo , R. Capuzzo Dolcetta , P. Miocchi , M. Montuori

We present results of a Hubble Space Telescope (HST) UBVI-band study of star clusters in tidal tails, using new WFC3 and ACS imaging to complement existing WFPC2 data. We survey 12 tidal tails across seven merging systems, deriving ages and…

In this work, we investigate the dynamical properties of 38 Galactic open clusters: 34 of them are located at low Galactic latitudes (|b| < 10$^{\circ}$) and are projected against dense stellar fields; the other 4 comparison objects present…

Astrophysics of Galaxies · Physics 2020-12-16 M. S. Angelo , W. J. B. Corradi , J. F. C. Santos , F. F. S. Maia , F. A. Ferreira

The Sixth Data Release (DR6) in the Sloan Digital Sky Survey (SDSS) provides more photometric regions, new features and more accurate data around globular cluster Palomar 5. A new method, Back Propagation Neural Network (BPNN), is used to…

Instrumentation and Methods for Astrophysics · Physics 2011-05-19 H. Zou , Z. -Y. Wu , J. Ma , X. Zhou

We aim to identify the cluster members, estimate cluster properties, study the dynamical state of the clusters as a function of mass, trace the existence of dynamical effects in massive stars, and check for spatial patterns of members in…

Solar and Stellar Astrophysics · Physics 2025-10-21 Harsha K. H. , Annapurni Subramaniam , S. R. Dhanush , Hariharan D. S

Blanco 1, a 100Myr open cluster in the solar neighborhood, is well known for its two 50pc-long tidal tails. Taking Blanco 1 as a reference, we find evidence of early-stage tidal disruption in two other open clusters of ~120Myr: the Pleiades…

Astrophysics of Galaxies · Physics 2021-07-26 Yezhang Li , Xiaoying Pang , Shih-Yun Tang

We examine the outer structure of 12 Galactic globular clusters using star-count analyses. Deep, two-color, photographic photometry is used to select and count stars with colors and magnitudes consistent with cluster-specific,…

Astrophysics · Physics 2014-10-13 C. J. Grillmair , K. C. Freeman , M. Irwin , P. J. Quinn