Dynamical age differences among coeval star clusters as revealed by blue stragglers

Abstract

Globular star clusters that formed at the same cosmic time may have evolved rather differently from a dynamical point of view (because that evolution depends on the internal environment) through a variety of processes that tend progressively to segregate stars more massive than the average towards the cluster centre. Therefore clusters with the same chronological age may have reached quite different stages of their dynamical history (that is, they may have different dynamical ages). Blue straggler stars have masses greater than those at the turn-off point on the main sequence and therefore must be the result of either a collision or a mass-transfer event. Because they are among the most massive and luminous objects in old clusters, they can be used as test particles with which to probe dynamical evolution. Here we report that globular clusters can be grouped into a few distinct families on the basis of the radial distribution of blue stragglers. This grouping corresponds well to an effective ranking of the dynamical stage reached by stellar systems, thereby permitting a direct measure of the cluster dynamical age purely from observed properties.

Published on the 20 December 2012 issue of Nature

References in corpus (22)

• The ACS Survey of Galactic Globular Clusters. VII. Relative Ages
• Internal Dynamics of Globular Clusters
• Formation of omega Centauri from an ancient nucleated dwarf galaxy in the young Galactic disc
• The giant, horizontal and asymptotic branches of galactic globular clusters. I. The catalog, photometric observables and features
• Accelerating NBODY6 with Graphics Processing Units
• Two distinct sequences of blue straggler stars in the globular cluster M30
• A Binary Origin for Blue Stragglers in Globular Clusters
• Blue straggler production in globular clusters
• The ACS LCID Project: On the origin of dwarf galaxy types: a manifestation of the halo assembly bias?
• Blue Straggler Stars: The Spectacular Population in M80
• The contribution of primordial binaries to the blue straggler population in 47 Tucanae
• The radial distribution of blue straggler stars and the nature of their progenitors
• A mass transfer origin for blue stragglers in NGC 188 as revealed by half-solar-mass companions
• The pure non-collisional Blue Straggler population in the giant stellar system omega Centauri
• The puzzling dynamical status of the core of the globular cluster NGC 6752
• The surface density profile of NGC 6388: a good candidate for harboring an intermediate-mass black hole
• The Blue Straggler Population of the Globular Cluster M5
• A Correlation between Blue Straggler and Binary Fractions in the core of Galactic Globular Clusters
• High-resolution simulations of stellar collisions between equal-mass main-sequence stars in globular clusters
• Blue straggler stars in dwarf spheroidal galaxies II: Sculptor and Fornax
• Globular Clusters in the Outer Galactic Halo: AM-1 and Palomar 14
• The ACS LCID project VII: the blue stragglers population in the isolated dSph galaxies Cetus and Tucana

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• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. I. Overview of the Project and Detection of Multiple Stellar Populations
• Modeling Dense Star Clusters in the Milky Way and Beyond with the $\text{CMC}$ Cluster Catalog
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• Stellar Radial Velocities in the Old Open Cluster M67 (NGC 2682) I. Memberships, Binaries, and Kinematics
• The velocity dispersion profile of NGC 6388 from resolved-star spectroscopy: no evidence of a central cusp and new constraints on the black hole mass
• Double Blue Straggler sequences in GCs: the case of NGC 362
• A novel look at energy equipartition in globular clusters
• Hubble Space Telescope Proper motion (HSTPROMO) Catalogs of Galactic Globular Clusters. VI. Improved data reduction and internal-kinematic analysis of NGC 362
• Investigating mass segregation process in globular clusters with Blue Straggler Stars: the impact of dark remnants
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters - XV. The dynamical clock: reading cluster dynamical evolution from the segregation level of blue straggler stars
• A new, Gaia based, catalogue of blue straggler stars in open clusters
• MIKiS: the Multi-Instrument Kinematic Survey of Galactic Globular Clusters. I. Velocity dispersion profiles and rotation signals of 11 globular clusters
• Star formation history of the Galactic bulge from deep HST imaging of low reddening windows
• Stellar Collisions and Blue Straggler Stars in Dense Globular Clusters
• Blue Straggler masses from pulsation properties. I. The case of NGC6541
• HST absolute Proper Motions of NGC 6681 (M70) and the Sagittarius Dwarf Spheroidal Galaxy
• Variable stars in Local Group Galaxies - II. Sculptor dSph
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• Formation of black holes in the pair-instability mass gap: evolution of a post-collision star
• A family picture: tracing the dynamical path of the structural properties of multiple populations in globular clusters
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• Blue Straggler Star Populations in Globular Clusters: II. Proper-Motion Cleaned HST Catalogs of BSSs in 38 Galactic GCs
• UOCS-VIII. UV Study of the open cluster NGC 2506 using ASTROSAT
• Spinning like a Blue Straggler: the population of fast rotating Blue Straggler stars in Omega Centauri
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• A chemical study of M67 candidate blue stragglers and evolved blue stragglers observed with APOGEE DR14
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• On the absolute age of the metal-rich globular M71 (NGC 6838): I. optical photometry
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• MOCCA code for star cluster simulations - VI. Bimodal spatial distribution of blue stragglers
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• Treatment of realistic tidal field in Monte Carlo simulations of star clusters
• An unexpected detection of bifurcated blue straggler sequences in the young globular cluster NGC 2173
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• Exploring the Mass Segregation Effect of X-ray Sources in Globular Clusters: The Case of 47 Tucanae
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