Energy equipartition in multiple-population globular clusters

Abstract

We present the results of Monte Carlo simulations aimed at exploring the evolution towards energy equipartition of first- (1G) and second-generation (2G) stars in multiple-population globular clusters and how this evolution is affected by the initial differences between the spatial distributions of the two populations. Our results show that these initial differences have fundamental implications for the evolution towards energy equipartition of the two populations. We find that 2G stars, which are assumed to be initially more centrally concentrated than 1G stars, are generally characterized by a more rapid evolution towards energy equipartition. The evolution towards energy equipartition depends on the velocity dispersion component and is more rapid for the tangential velocity dispersion. The extent of the present-day differences between the degree of energy equipartition of 2G and 1G stars depends on the cluster's dynamical age and may be more significant in the tangential velocity dispersion and at intermediate distances from the cluster's center around the half-mass radius.

13 pages, 13 figures, Published in MNRAS

References in corpus (57)

• On the variation of the Initial Mass Function
• Evolution of binary stars and the effect of tides on binary populations
• Comprehensive analytic formulae for stellar evolution as a function of mass and metallicity
• A statistical study of 233 pulsar proper motions
• Multiple populations in globular clusters. Lessons learned from the Milky Way globular clusters
• Na-O Anticorrelation and HB. VII. The chemical composition of first and second-generation stars in 15 globular clusters from GIRAFFE spectra
• Multiple Stellar Populations in Globular Clusters
• Formation and Dynamical Evolution of Multiple Stellar Generations in Globular Clusters
• Na-O Anticorrelation and HB. VIII. Proton-capture elements and metallicities in 17 globular clusters from UVES spectra
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. IX. The Atlas of Multiple Stellar Populations
• Stellar Collisions During Binary-Binary and Binary-Single Star Interactions
• What is a globular cluster? An observational perspective
• MOCCA Code for Star Cluster Simulations - II. Comparison with N-body Simulations
• MOCCA code for star cluster simulations - I. Blue Stragglers, first results
• Secondary star formation within massive star clusters: Origin of multiple stellar populations in globular clusters
• Mining SDSS in search of Multiple Populations in Globular Clusters
• No Energy Equipartition in Globular Clusters
• Radial distribution of the multiple stellar populations in omega Centauri
• Deep FORS1 observations of the double Main Sequence of omega Centauri
• The HST large programme on $\omega$ Centauri - II. internal kinematics
• Detailed Abundances for a Large Sample of Giant Stars in the Globular Cluster 47 Tucanae (NGC 104)
• The Hubble Space Telescope UV Legacy Survey of galactic globular clusters. VI. The internal kinematics of the multiple stellar populations in NGC 2808
• A novel look at energy equipartition in globular clusters
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. XXIII. Proper-motion catalogs and internal kinematics
• Hubble Space Telescope Proper motion (HSTPROMO) Catalogs of Galactic Globular Clusters. VI. Improved data reduction and internal-kinematic analysis of NGC 362
• Multiple populations in globular clusters: the distinct kinematic imprints of different formation scenarios
• Rotation and multiple stellar population in globular clusters
• First evidence of fully spatially mixed first and second generations in globular clusters: the case of NGC 6362
• Differences in the rotational properties of multiple stellar populations in M 13: a faster rotation for the "extreme" chemical subpopulation
• Three-Component Kinematics of Multiple Stellar Populations in Globular Clusters with Gaia and VLT
• Gaia unveils the kinematics of multiple stellar populations in 47 Tucanae
• Evolution of second generation stars in stellar disks of globular and nuclear clusters: Omega Centauri as a test case
• Formation of Second Generation Stars in Globular Clusters
• A family picture: tracing the dynamical path of the structural properties of multiple populations in globular clusters
• Dynamical Evolution of Multiple-Population Globular Clusters
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. XVIII. Proper-motion kinematics of multiple stellar populations in the core regions of NGC 6352
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. X. The radial distribution of stellar populations in NGC 2808
• Kinematical evolution of multiple stellar populations in star clusters
• A Wide-Field View on Multiple Stellar Populations in 28 Milky Way Globular Clusters
• Second generation stellar disks in Dense Star Clusters and cluster ellipticities
• Metallicity variations in the Type II globular cluster NGC6934
• On the Link Between Energy Equipartition and Radial Variation in the Stellar Mass Function of Star Clusters
• The complex stellar system M 22: confirming abundance variations with high precision differential measurements
• The origin of discrete multiple stellar populations in globular clusters
• Spectroscopy and photometry of the least-massive Type-II globular clusters: NGC1261 AND NGC6934
• Monte Carlo simulations of multiple populations in globular clusters: constraints on the cooling flow vs. accretion scenario using million bodies simulations
• The role of rotation on the formation of second generation stars in globular clusters
• New insights into star cluster evolution towards energy equipartition
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. XXIV. Differences in internal kinematics of multiple stellar populations
• On the role of Type Ia supernovae in the second generation star formation in globular clusters
• Kinematic fingerprint of core-collapsed globular clusters
• MOCCA: Dynamics and evolution of binary stars of multiple stellar populations in tidally filling and underfilling globular star clusters
• Second generation star formation in globular clusters of different masses
• Dynamics of star clusters with tangentially anisotropic velocity distribution
• Ionising Feedback Effects on Star Formation in Globular Clusters with Multiple Stellar Populations
• The structural properties of multiple populations in the dynamically young globular cluster NGC 2419
• Internal Dynamics of Multiple Populations in 28 Galactic Globular Clusters: A Wide-Field study with Gaia and the Hubble Space Telescope

Cited by in corpus (6)

• Exploring the formation environment of multiple stellar populations in Globular Clusters through binary systems
• Phase-space mixing of multiple stellar populations in globular clusters
• A JWST project on 47 Tucanae: kinematics, energy equipartition and anisotropy of multiple populations
• The internal kinematics of NGC 2808 and its multiple populations
• Evolution of the kinematic properties of rotating multiple-population globular clusters
• Spatial mixing of stellar populations in globular clusters via binary-single star scattering