Tidal tails of open star clusters as probes to early gas expulsion II: Predictions for Gaia

Abstract

We study the formation and evolution of the tidal tail released from a young Pleiades-like star cluster, due to expulsion of primordial gas in a realistic gravitational field of the Galaxy. The tidal tails (as well as clusters) are integrated from their embedded phase for 300 Myr. We vary star formation efficiencies (SFEs) from 33% to 100% and the timescales of gas expulsion as free parameters, and provide predictions for the morphology and kinematics of the evolved tail for each of the models. The resulting tail properties are intended for comparison with anticipated Gaia observations in order to constrain the poorly understood early conditions during the gas phase and gas expulsion. The simulations are performed with the code Nbody6 including a realistic external gravitational potential of the Galaxy, and an analytical approximation for the natal gaseous potential. Assuming that the Pleiades formed with rapid gas expulsion and an SFE of $\approx 30$%, the current Pleiades are surrounded by a rich tail extending from $\approx 150$ to $\approx 350$ pc from the cluster and containing 0.7 to 2.7 times the number of stars in the present-day cluster. If the Pleiades formed with an SFE close to 100%, then the tail is shorter ($\lesssim 90$ pc) and substantially poorer, containing only $\approx 2$% of the number of present-day cluster stars. If the Pleiades formed with an SFE of $\approx 30$%, but the gas expulsion was adiabatic, the tail signatures are indistinguishable from the case of the model with 100% SFE. The model takes into account the estimated contamination due to the field stars and the Hyades-Pleiades stream, which constitutes a more limiting factor than the accuracy of the Gaia measurements.

arXiv commentAccepted for publication in A&A, 27 pages, 15 figures, 4 tables

References in corpus (54)

• On the variation of the Initial Mass Function
• The Gaia mission
• Embedded Clusters in Molecular Clouds
• Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
• The Spitzer c2d Legacy Results: Star Formation Rates and Efficiencies; Evolution and Lifetimes
• Dynamical evolution of star clusters in tidal fields
• Re-examining Larson's Scaling Relationships in Galactic Molecular Clouds
• Gaia Data Release 2: first stellar parameters from Apsis
• The Formation of a Bound Star Cluster: From the Orion Nebula Cluster to the Pleiades
• Keck Spectra of Pleiades Brown Dwarf Candidates and a Precise Determination of the Lithium Depletion Edge in the Pleiades
• Local kinematics of K and M giants from Coravel/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters
• A comprehensive set of simulations studying the influence of gas expulsion on star cluster evolution
• Kinematics in Young Star Clusters and Associations with Gaia DR2
• Massive stars in massive clusters II: Disruption of bound clusters by photoionization
• The Dynamics of Radiation Pressure-Dominated HII Regions
• The relation between the most-massive star and its parental star cluster mass
• Inverse dynamical population synthesis: Constraining the initial conditions of young stellar clusters by studying their binary populations
• The Origin of OB Runaway Stars
• Importance of the Initial Conditions for Star Formation - I. Cloud Evolution and Morphology
• The Effect of Gas Loss on the Formation of Bound Stellar Clusters
• Statistics of N-body Simulations I. Equal Masess Before Core Collapse
• The Spitzer Space Telescope Survey of the Orion A and B Molecular Clouds II: the Spatial Distribution and Demographics of Dusty Young Stellar Objects
• Tidal Tails of Star Clusters
• The Spatial Structure of Young Stellar Clusters. I. Subclusters
• The Besancon Galaxy model renewed I. Constraints on the local star formation history from Tycho data
• The Hyades tidal tails revealed by Gaia DR2
• The properties of dynamically ejected runaway and hyper-runaway stars
• On the structure of tidal tails
• Ionizing feedback from massive stars in massive clusters: Fake bubbles and untriggered star formation
• Universality of young cluster sequences
• A Magnetically-Supported Photodissociation Region in M17
• The mmax-Mecl relation, the IMF and IGIMF: probabilistically sampled functions?
• A highly abnormal massive star mass function in the Orion Nebula cluster and the dynamical decay of trapezia systems
• The distribution of nearby stars in phase space mapped by Hipparcos III. Clustering and streaming among A-F type stars
• The statistical properties of stars and their dependence on metallicity: the effects of opacity
• 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
• Molecular Cloud Evolution V. Cloud Destruction by Stellar Feedback
• Discovery of Tidal Tails in Disrupting Open Clusters: Coma Berenices and a Neighbor Stellar Group
• Modeling a high mass turn down in the stellar initial mass function
• Star Cluster Formation in a Turbulent Molecular Cloud Self-Regulated by Photo-Ionisation Feedback
• Praesepe (NGC 2632) and its tidal tails
• The bound fraction of young star clusters
• How can young massive clusters reach their present-day sizes?
• Did the infant R136 and NGC 3603 clusters undergo residual gas expulsion?
• Evidence for feedback and stellar-dynamically regulated bursty star cluster formation: the case of the Orion Nebula Cluster
• Complete ejection of OB stars from very young star clusters and the formation of multiple populations
• SILCC-ZOOM: The early impact of ionizing radiation on forming molecular clouds
• Extended stellar systems in the solar neighborhood - III. Like ships in the night: the Coma Berenices neighbor moving group
• Tidal tails of open star clusters as probes to early gas expulsion I: A semi-analytic model
• The Distribution of Stellar Mass in the Pleiades
• Mass Segregation in Star Clusters: Analytic Estimation of the Timescale
• Unexpected Formation Modes of the First Hard Binary in Core Collapse
• The Structure of the Young Star Cluster NGC 6231. II. Structure, Formation, and Fate

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• Structural parameters of 389 local Open Clusters
• Extended stellar systems in the solar neighborhood -- V. Discovery of coronae of nearby star clusters
• 3D Morphology of Open Clusters in the Solar Neighborhood with Gaia EDR3: its Relation to Cluster Dynamics
• Asymmetrical tidal tails of open star clusters: stars crossing their cluster's prah challenge Newtonian gravitation
• Rotation and Lithium Confirmation of a 500 Parsec Halo for the Open Cluster NGC 2516
• Disruption of Hierarchical Clustering in the Vela OB2 Complex and the Cluster Pair Collinder 135 and UBC7 with Gaia EDR3: Evidence of Supernova Quenching
• 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
• The spin, expansion and contraction of open star clusters
• A gravitational and dynamical framework of star formation: The Orion Nebula
• Global properties, fractality, and mass segregation in single, paired, and grouped open clusters
• Estimating the ages of open star clusters from properties of their extended tidal tails
• LAMOST medium-resolution observations of the Pleiades
• The mass distribution of stellar mergers: A new scenario for several FS CMa stars
• Dark Star Clusters or Ultra-Faint Dwarf galaxies? Revisiting UMa3/U1
• The 800pc long tidal tails of the Hyades star cluster: Possible discovery of candidate epicyclic overdensities from an open star cluster
• Dynamical model of Praesepe and its tidal tails
• The mmax-Mecl relation in the LEGUS clusters