The dynamical state of the globular clusters Rup 106 and IC 4499

Abstract

The dynamical evolution of globular clusters is theoretically described by a series of well known events typical of N-body systems. Still, the identification of observational signatures able to empirically describe the stage of dynamical evolution of a stellar system of the density typical of a globular cluster, represents a challenge. In this paper we study the dynamical age of the globular clusters Rup 106 and IC 4499. To this aim, we study the radial distribution of the Blue Straggler Stars via the A+ parameter and of the slope of the Main Sequence Mass Function. Both tracers show that Rup 106 and IC 4499 are dynamically young clusters where dynamical friction has just started to segregate massive stars towards the clusters' centre. In fact, we observe that the Blue Straggler stars are more centrally concentrated in both clusters than the reference population. On the same line, we find that in both cases the slope of the mass function significantly decreases as a function of the cluster-centric distances. This result provides additional support for the use of the the radial distribution of the blue stragglers as a powerful observationally convenient indicator of the cluster dynamical age.

arXiv commentAccepted for publication on A&A

References in corpus (48)

• Gaia Data Release 2. Summary of the contents and survey properties
• The Gaia mission
• The Photometric Performance and Calibration of the HST Advanced Camera For Surveys
• Multiple Stellar Populations in Globular Clusters
• A catalogue of masses, structural parameters and velocity dispersion profiles of 112 Milky Way globular clusters
• The ACS Survey of Galactic Globular Clusters. IX. Horizontal Branch Morphology and the Second Parameter Phenomenon
• Mean proper motions, space orbits and velocity dispersion profiles of Galactic globular clusters derived from Gaia DR2 data
• Origin of the system of globular clusters in the Milky Way
• GaBoDS: The Garching-Bonn Deep Survey; IV. Methods for the Image reduction of multi-chip Cameras
• Dynamical age differences among coeval star clusters as revealed by blue stragglers
• Two distinct sequences of blue straggler stars in the globular cluster M30
• Globular clusters in the outer Galactic halo: new HST/ACS imaging of 6 globular clusters and the Galactic globular cluster age-metallicity relation
• A Binary Origin for Blue Stragglers in Globular Clusters
• THELI -- Convenient reduction of any optical, near- and mid-infrared imaging data
• Ruprecht 106: the first single population Globular Cluster?
• Star count density profiles and structural parameters of 26 Galactic globular clusters
• Homogeneous photometry VII. Globular clusters in the Gaia era
• Deep HST-WFPC2 photometry of NGC 288. I. Binary Systems and Blue Stragglers
• Double Blue Straggler sequences in GCs: the case of NGC 362
• The pure non-collisional Blue Straggler population in the giant stellar system omega Centauri
• Using long-term millisecond pulsar timing to obtain physical characteristics of the bulge globular cluster Terzan 5
• ON BLUE STRAGGLER FORMATION BY DIRECT COLLISIONS OF MAIN-SEQUENCE STARS
• The Young Globular Clusters of the Milky Way and the Local Group Galaxies: Playing With Great Circles
• 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
• Blue Straggler masses from pulsation properties. I. The case of NGC6541
• A Correlation between Blue Straggler and Binary Fractions in the core of Galactic Globular Clusters
• The Origins of Blue Stragglers and Binarity in Globular Clusters
• Evidence of a dwarf galaxy stream populating the inner Milky Way Halo
• A family picture: tracing the dynamical path of the structural properties of multiple populations in globular clusters
• Globular Clusters in the Outer Galactic Halo: AM-1 and Palomar 14
• No evidence of mass segregation in the low mass Galactic globular cluster NGC 6101
• The dynamical state and blue straggler population of the globular cluster NGC 6266 (M62)
• All quiet in the outer halo: chemical abundances in the globular cluster Pal 3
• A kinematic view of NGC 1261: structural parameters, internal dispersion, absolute proper motion and Blue Straggler Stars
• Chemical Abundances for the Outer Halo Cluster Pal 4 from Co-added High-Resolution Spectroscopy
• Star density profiles of six old star clusters in the Large Magellanic Cloud
• Radial variation of the stellar mass functions in the globular clusters M15 and M30: clues of a non-standard IMF?
• IC4499 revised: spectro-photometric evidence of small light-element variations
• Constraints on the Formation of the Globular Cluster IC 4499 from Multi-Wavelength Photometry
• Central energy equipartition in multi-mass models of globular clusters
• The Luminosity Function and stellar Mass to Light ratio of the massive globular cluster NGC2419
• Modelling the Observed Stellar Mass Function and its Radial Variation in Galactic Globular Clusters
• Mock Observations of Blue Stragglers in Globular Cluster Models
• Excess of Ca (and Sc) produced in globular cluster multiple populations: a first census in 77 Galactic globular clusters
• The central Blue Straggler population in four outer-halo globular clusters
• Searching for Multiple Populations in Ruprecht 106
• The radial distribution of Blue stragglers in Galactic Globular Cluster NGC 6656 $-$ Clues on the dynamical status

Cited by in corpus (3)

• Empirical measurement of the dynamical ages of three globular clusters and some considerations on the use of the dynamical clock
• The dynamical age of the LMC globular cluster NGC 1835 using the "dynamical clock"
• Revealing the stellar population of the ultra-obscured Galactic globular cluster Glimpse-C02