Evolution of star clusters with initial bulk rotation via N-body simulations
arXiv:2505.20432 · doi:10.1051/0004-6361/202554093
Abstract
Young star clusters can inherit bulk rotation from the molecular clouds from which they have formed. This rotation can affect the long-term evolution of a star cluster and its constituent stellar populations. In this study, we aim to characterize the effects of different degrees of initial rotation on star clusters with primordial binaries. The simulations are performed using NBODY6++GPU. We find that initial rotation strongly affects the early evolution of star clusters. Rapidly rotating clusters show angular momentum transport from the inner parts to the outskirts, resulting in a core collapse. Angular momentum transport is accompanied by a highly elongated bar-like structure morphology. The effects of bulk rotation are reduced on the timescale of two-body relaxation. Rotating and non-rotating clusters experience changes in the direction of angular momentum near the dissolution and early evolution due to the tidal field, respectively. We present synthetic observations of simulated clusters for comparison with future observations in filters of Gaia, CSST, and HST. This work shows the effects of bulk rotation on systems with primordial binaries and could be used for the identification of rotation signatures in observed open clusters.
References in corpus (36)
- Astropy: A Community Python Package for Astronomy
- The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
- Gaia Data Release 3: Summary of the content and survey properties
- Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
- Star Clusters Across Cosmic Time
- Mass segregation and fractal substructure in young massive clusters: (I) the McLuster code and method calibration
- Stellar Dynamics and Stellar Phenomena Near A Massive Black Hole
- Formation and evolution of compact binaries in globular clusters: I.Binaries with white dwarfs
- The internal rotation of globular clusters revealed by Gaia DR2
- The GRIFFIN project -- Formation of star clusters with individual massive stars in a simulated dwarf galaxy starburst
- N-body Models of Rotating Globular Clusters
- Star Clusters with Primordial Binaries: II. Dynamical Evolution of Models in a Tidal Field
- 3D Morphology of Open Clusters in the Solar Neighborhood with Gaia EDR3: its Relation to Cluster Dynamics
- Dynamical evolution of rotating stellar systems - II. Post-collapse, equal mass system
- Preparing the next gravitational million-body simulations: Evolution of single and binary stars in Nbody6++GPU, MOCCA and McLuster
- Rotation in young massive star clusters
- Stellar Dynamics around Black Holes in Galactic Nuclei
- Comparative study between N-body and Fokker-Planck simulations for rotating star clusters: I. Equal-mass system
- Comparative study between N-body and Fokker-Planck simulations for rotating star clusters - II. 2-component models
- 3D Morphology of Open Clusters in the Solar Neighborhood with Gaia EDR3 II: Hierarchical Star Formation Revealed by Spatial and Kinematic Substructures
- Dynamical Evolution of Rotating Stellar Systems: III. The Effect of Mass Spectrum
- 2D Fokker-Planck models of rotating clusters
- The impact of stellar evolution on rotating star clusters: the gravothermal-gravogyro catastrophe and the formation of a bar of black holes
- Evolution of fractality and rotation in embedded star clusters
- The complex kinematics of rotating star clusters in a tidal field
- Structure and rotation of young massive star clusters in a simulated dwarf starburst
- Evolution of growing black holes in axisymmetric galaxy cores
- The spin, expansion and contraction of open star clusters
- Early dynamical evolution of rotating star clusters in a tidal field
- Early dynamics and violent relaxation of multi-mass rotating star clusters
- A Monte Carlo study of early gas expulsion and evolution of star clusters: new simulations with the MOCCA code in the AMUSE framework
- GalevNB: a conversion from N-BODY simulations to observations
- Dynamical evolution of Milky Way globular clusters on the cosmological timescale I. Mass loss and interaction with the nuclear star cluster
- First observational evidence of a relation between globular clusters' internal rotation and stellar masses
- Investigating the UV-excess in star clusters with -body simulations: predictions for future CSST observations
- Evolution of the disky second generation of stars in globular clusters on cosmological timescale