Star density profiles of six old star clusters in the Large Magellanic Cloud

Abstract

We used resolved star counts from Hubble Space Telescope images to determine the center of gravity and the projected density profiles of 6 old globular clusters in the Large Magellanic Cloud (LMC), namely NGC 1466, NGC 1841, NGC 1898, NGC 2210, NGC 2257 and Hodge 11. For each system, the LMC field contribution was properly taken into account by making use, when needed, of parallel HST observations. The derived values of the center of gravity may differ by several arcseconds (corresponding to more than 1 pc at the distance of the LMC) from previous determinations. The cluster density profiles are all well fit by King models, with structural parameters that may differ from the literature ones by even factors of two. Similarly to what observed for Galactic globular clusters, the ratio between the effective and the core radii has been found to anti-correlate with the cluster dynamical age.

arXiv comment15 pages, 12 figures, in press on the ApJ

References in corpus (43)

• Resolved Massive Star Clusters in the Milky Way and its Satellites: Brightness Profiles and a Catalogue of Fundamental Parameters
• An eclipsing binary distance to the Large Magellanic Cloud accurate to 2 per cent
• A catalogue of masses, structural parameters and velocity dispersion profiles of 112 Milky Way globular clusters
• An ACS Survey of Globular Clusters V: Star Catalog for Each Cluster
• Internal Dynamics of Globular Clusters
• Surface Brightness Profiles and Structural Parameters for 53 Rich Stellar Clusters in the Large Magellanic Cloud
• Dynamical age differences among coeval star clusters as revealed by blue stragglers
• Black holes and core expansion in massive star clusters
• Two distinct sequences of blue straggler stars in the globular cluster M30
• Surface Brightness Profiles of Galactic Globular Clusters from Hubble Space Telescope Images
• Which Globular Clusters contain Intermediate-mass Black Holes?
• Star count density profiles and structural parameters of 26 Galactic globular clusters
• Blue Straggler Stars: The Spectacular Population in M80
• Discovery of Carbon/Oxygen depleted Blue Straggler Stars in 47 Tucanae: the chemical signature of a mass-transfer formation process
• Core Formation by a Population of Massive Remnants
• 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
• Deep HST-WFPC2 photometry of NGC 288. I. Binary Systems and Blue Stragglers
• New density profile and structural parameters of the complex stellar system Terzan 5
• Kinematic signature of an intermediate-mass black hole in the globular cluster NGC 6388
• Double Blue Straggler sequences in GCs: the case of NGC 362
• Another Non-segregated Blue Straggler Population in a Globular Cluster: the Case of NGC 2419
• The puzzling dynamical status of the core of the globular cluster NGC 6752
• Tidal disruption, global mass function and structural parameters evolution in star clusters
• The surface density profile of NGC 6388: a good candidate for harboring an intermediate-mass black hole
• 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 Panchromatic Study of the Globular Cluster NGC 1904. I: The Blue Straggler Population
• MIKiS: the Multi-Instrument Kinematic Survey of Galactic Globular Clusters. I. Velocity dispersion profiles and rotation signals of 11 globular clusters
• The Blue Straggler Population of the Globular Cluster M5
• Blue Straggler masses from pulsation properties. I. The case of NGC6541
• The strong rotation of M5 (NGC 5904) as seen from the MIKiS Survey of Galactic Globular Clusters
• No evidence of mass segregation in the low mass Galactic globular cluster NGC 6101
• The Peculiar Radial Distribution of Multiple Populations in the massive globular cluster M80
• Characteristic radii of the Milky Way Globular Clusters
• The "UV-route" to search for Blue Straggler Stars in Globular Clusters: first results from the HST UV Legacy Survey
• Structural parameters and blue stragglers in Sagittarius dwarf spheroidal galaxy globular clusters
• The dynamical state of the Globular Cluster M10 (NGC 6254)
• Proper motions and structural parameters of the Galactic globular cluster M71
• The ESO Multi-Instrument Kinematic Survey (MIKiS) of Galactic Globular Clusters: solid body rotation and anomalous velocity dispersion profile in NGC 5986
• Discovery of a double Blue Straggler sequence in M15: new insight into the core-collapse process
• Spectral Energy Distribution of Blue Stragglers in the core of 47 Tucanae
• Testing multi-mass dynamical models of star clusters with real data: mass segregation in three Galactic globular clusters
• Blue straggler stars beyond the Milky Way. II. A binary origin for blue straggler stars in Magellanic Cloud clusters

Cited by in corpus (26)

• A new class of fossil fragments from the hierarchical assembly of the Galactic bulge
• A kinematic view of NGC 1261: structural parameters, internal dispersion, absolute proper motion and Blue Straggler Stars
• The "dynamical clock": dating the internal dynamical evolution of star clusters with Blue Straggler Stars
• Digging for relics of the past: the ancient and obscured bulge globular cluster NGC6256
• Discovery of a double sequence of blue straggler stars in the core-collapsed globular cluster NGC 6256
• A new identity card for the bulge globular cluster NGC 6440 from resolved star counts
• Digging into the Galactic Bulge: stellar population and structure of the poorly studied cluster NGC 6316
• Empirical measurement of the dynamical ages of three globular clusters and some considerations on the use of the dynamical clock
• Structure and Internal Kinematics of Nine Inner Milky Way Globular Clusters
• A new low-luminosity globular cluster discovered in the Milky Way with the VVVX survey
• Internal kinematics and structure of the bulge globular cluster NGC 6569
• The ESO-VLT MIKiS survey reloaded: exploring the internal kinematics of NGC 6440
• A young white dwarf orbiting PSR J1835-3259B in the bulge globular cluster NGC 6652
• Slowly cooling white dwarfs in NGC 6752
• The structural properties of multiple populations in the dynamically young globular cluster NGC 2419
• A Census of Above-Horizontal-Branch Stars in Galactic Globular Clusters
• A Photometric in-depth look at the core-collapsed globular cluster NGC 6284
• Searching for new observational signatures of the dynamical evolution of star clusters
• An ongoing tidal capture in the Large Magellanic Cloud: the low-mass star cluster KMK88-10 captured by the massive globular cluster NGC 1835?
• RR Lyrae Stars in Intermediate-age Magellanic Clusters: Membership Probabilities and Delay Time Distribution
• The dynamical state of the globular clusters Rup 106 and IC 4499
• The dynamical age of the LMC globular cluster NGC 1835 using the "dynamical clock"
• Discovery of an extended Horizontal Branch in the Large Magellanic Cloud globular cluster NGC1835
• The "canonical" White Dwarf Cooling Sequence of M5
• Structural parameters, chronological age and dynamical age of the LMC globular cluster NGC 1754
• The ESO-VLT MIKiS survey reloaded: velocity dispersion profile and rotation curve of NGC 1904