The 800pc long tidal tails of the Hyades star cluster: Possible discovery of candidate epicyclic overdensities from an open star cluster

Abstract

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 stellar cluster with backward-integrated initial conditions on a realistic 3D orbit in the Milky Way computed within the AMUSE framework. For the first time, we explore the effect of the initial cluster rotation and the presence of lumps in the Galactic potential on the formation and evolution of tidal tails. We show that the tidal tails are not naturally clustered in any coordinate system. Models with initial rotation result in significant differences in the cluster mass loss and follow different angular momentum time evolution. The orientation of the tidal tails relative to the motion vector of the cluster and the current cluster angular momentum constrain the initial rotation of the cluster. We highlight the use of the convergent point (CP) method in searches for co-moving groups and introduce a new compact CP (CCP) method that accounts for internal kinematics based on an assumed model. Using the CCP method, we are able to recover candidate members of the Hyades tidal tails in the Gaia DR2 and eDR3 reaching a total extent of almost 1kpc. We confirm the previously noted asymmetry in the detected tidal tails. In the eDR3 data we recovered spatial overdensities in the leading and trailing tails that are kinematically consistent with being epicyclic overdensities and thus present candidates for the first such detection in an open star cluster. We show that the epicyclic overdensities are able to provide constraints not only on the cluster properties, but also on the Galactic potential. Finally, based on N-body simulations, a close encounter with a massive Galactic lump can explain the observed asymmetry in the tidal tails of the Hyades.(abriged)

arXiv commentA&A accepted: https://doi.org/10.1051/0004-6361/202039949, ESA press release (link active when published by A&A): https://www.esa.int/Science_Exploration/Space_Science/Gaia/Is_the_nearest_star_cluster_to_the_Sun_being_destroyed

References in corpus (81)

• Astropy: A Community Python Package for Astronomy
• Gaia Data Release 2. Summary of the contents and survey properties
• Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
• Embedded Clusters in Molecular Clouds
• The Galaxy in Context: Structural, Kinematic and Integrated Properties
• Trigonometric Parallaxes of High Mass Star Forming Regions: the Structure and Kinematics of the Milky Way
• The PPMXL catalog of positions and proper motions on the ICRS. Combining USNO-B1.0 and 2MASS
• Dynamical evolution of star clusters in tidal fields
• Painting a portrait of the Galactic disc with its stellar clusters
• Parallaxes and proper motions for 20 open clusters as based on the new Hipparcos catalogue
• The Formation of a Bound Star Cluster: From the Orion Nebula Cluster to the Pleiades
• Star cluster ecology IVa: Dissection of an open star cluster---photometry
• Inverse Dynamical Population Synthesis and Star Formation
• The extended tails of Palomar 5: A ten degree arc of globular cluster tidal debris
• The APOGEE-2 Survey of the Orion Star Forming Complex II: Six-dimensional structure
• Supernova Type Ia progenitors from merging double white dwarfs: Using a new population synthesis model
• The Dynamical Properties of Stellar Systems in the Galactic Disc
• Multi-physics simulations using a hierarchical interchangeable software interface
• The Astrophysical Multipurpose Software Environment
• Inverse dynamical population synthesis: Constraining the initial conditions of young stellar clusters by studying their binary populations
• Untangling the Galaxy I: Local Structure and Star Formation History of the Milky Way
• Milky Way Mass Models for Orbit Calculations
• A multiphysics and multiscale software environment for modeling astrophysical systems
• The Spur and the Gap in GD-1: Dynamical evidence for a dark substructure in the Milky Way halo
• Globular Cluster Streams as Galactic High-Precision Scales - The Poster Child Palomar 5
• The impact of the metallicity and star formation rate on the time-dependent galaxy-wide stellar initial mass function
• Performance Analysis of Direct N-Body Algorithms on Special-Purpose Supercomputers
• Tidal Tails of Star Clusters
• More on the structure of tidal tails
• K2 rotation periods for low-mass Hyads and a quantitative comparison of the distribution of slow rotators in the Hyades and Praesepe
• Age Determinations of the Hyades, Praesepe, and Pleiades via MESA Models with Rotation
• The Hyades tidal tails revealed by Gaia DR2
• Star Cluster Evolution, Dynamical Age Estimation and the Kinematical Signature of Star Formation
• Dynamical ejections of massive stars from young star clusters under diverse initial conditions
• A deep all-sky census of the Hyades
• 3D mapping of young stars in the solar neighbourhood with Gaia DR2
• On the structure of tidal tails
• SAPPORO: A way to turn your graphics cards into a GRAPE-6
• 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
• Dependency of dynamical ejections of O stars on the masses of very young star clusters
• The Helium content and age of the Hyades: Constraints from five binary systems and Hipparcos parallaxes
• Structure, kinematics, and ages of the young stellar populations in the Orion region
• TESS reveals that the nearby Pisces-Eridanus stellar stream is only 120 Myr old
• Discovery of Tidal Tails in Disrupting Open Clusters: Coma Berenices and a Neighbor Stellar Group
• A refurbished convergent point method for finding moving groups in the Hipparcos Catalogue
• Quantitative analysis of clumps in the tidal tails of star clusters
• A Tale of Three Cities: OmegaCAM discovers multiple sequences in the color-magnitude diagram of the Orion Nebula Cluster
• N-body Integrators with Individual Time Steps from Hierarchical Splitting
• Praesepe (NGC 2632) and its tidal tails
• How can young massive clusters reach their present-day sizes?
• Revised Geometric Estimates of the North Galactic Pole and the Sun's Height Above the Galactic Midplane
• Dynamical population synthesis: Constructing the stellar single and binary contents of galactic field populations
• Evidence for feedback and stellar-dynamically regulated bursty star cluster formation: the case of the Orion Nebula Cluster
• A ring in a shell: the large-scale 6D structure of the Vela OB2 complex
• Diagnosing the Stellar Population and Tidal Structure of the Blanco1 Star Cluster
• When the tale comes true: multiple populations and wide binaries in the Orion Nebula Cluster
• Shape parameters of Galactic open clusters
• Stellar streams as gravitational experiments II. Asymmetric tails of globular cluster streams
• Uncovering a 260 pc wide, 35 Myr old filamentary relic of star formation
• A sextet of clusters in the Vela OB2 region revealed by Gaia
• A Gaia study of the Hyades open cluster
• Towards a complete stellar mass function of the Hyades. I. Pan-STARRS1 optical observations of the low-mass stellar content
• How fast do young star clusters expel their natal gas?: Estimating the upper limit of the gas expulsion time-scale
• On the tidal tails of Milky Way globular clusters
• Gaia Data Release 2: Rotational modulation in late-type dwarfs
• A stellar relic filament in the Orion star forming region
• Extended stellar systems in the solar neighborhood - III. Like ships in the night: the Coma Berenices neighbor moving group
• Simulations of the Hyades
• The evolution of the Sun's birth cluster and the search for the solar siblings with Gaia
• Determination of the Sun's Offset from the Galactic Plane Using Pulsars
• Tidal tails of open star clusters as probes to early gas expulsion I: A semi-analytic model
• Kinematic modelling of clusters with Gaia: the Death Throes of the Hyades
• The rate of stellar encounters along a migrating orbit of the Sun
• Understanding the internal dynamics of elliptical galaxies without non-baryonic dark matter
• Tidal tails of open star clusters as probes to early gas expulsion II: Predictions for Gaia
• The Chemical Nature of the Young 120-Myr-old Nearby Pisces-Eridanus Stellar Stream Flowing through the Galactic Disk
• Hyades dynamics from N-body simulations: Accuracy of astrometric radial velocities from Hipparcos
• A connected component-based method for efficiently integrating multiscale $N$-body systems
• A census of the near-by Pisces-Eridanus stellar stream -- Commonalities with and disparities from the Pleiades
• The disruption of the low-mass globular cluster E3

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• Structural parameters of 389 local Open Clusters
• Significance Mode Analysis (SigMA) for hierarchical structures. An application to the Sco-Cen OB association
• 3D Morphology of Open Clusters in the Solar Neighborhood with Gaia EDR3 II: Hierarchical Star Formation Revealed by Spatial and Kinematic Substructures
• A 0.9% Calibration of the Galactic Cepheid luminosity scale based on Gaia DR3 data of open clusters and Cepheids
• Rotation and Lithium Confirmation of a 500 Parsec Halo for the Open Cluster NGC 2516
• The Fifth Catalogue of Nearby Stars (CNS5)
• Tidal tails in the disintegrating open cluster NGC 752
• A tale of caution: the tails of NGC 752 are much longer than claimed
• Stellar Rotation and Structure of the $\alpha$ Persei Complex: When Does Gyrochronology Start to Work?
• The impact of massive stars and black holes on the fate of open star clusters and their tidal streams
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• NGC1605a and b: an old binary open cluster in the Galaxy
• The Stellar "Snake" I: Whole Structure and Properties
• Stellar streams and dark substructure: the diffusion regime
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