The VISCACHA survey -- II. Structure of star clusters in the Magellanic Clouds periphery

Abstract

We provide a homogeneous set of structural parameters of 83 star clusters located at the periphery of the Small Magellanic Cloud (SMC) and the Large Magellanic Cloud (LMC). The clusters' stellar density and surface brightness profiles were built from deep, AO assisted optical images, and uniform analysis techniques. The structural parameters were obtained from King and Elson et al. model fittings. Integrated magnitudes and masses (for a subsample) are also provided. The sample contains mostly low surface brightness clusters with distances between 4.5 and 6.5 kpc and between 1 and 6.5 kpc from the LMC and SMC centres, respectively. We analysed their spatial distribution and structural properties, comparing them with those of inner clusters. Half-light and Jacobi radii were estimated, allowing an evaluation of the Roche volume tidal filling. We found that: (i) for our sample of LMC clusters, the tidal radii are, on average, larger than those of inner clusters from previous studies; (ii) the core radii dispersion tends to be greater for LMC clusters located towards the southwest, with position angles of $\sim$200 degrees and about $\sim$5 degrees from the LMC centre, i.e., those LMC clusters nearer to the SMC; (iii) the core radius evolution for clusters with known age is similar to that of inner clusters; (iv) SMC clusters with galactocentric distances closer than 4 kpc are overfilling; (v) the recent Clouds collision did not leave marks on the LMC clusters' structure that our analysis could reveal.

19 pages, 16 figures, accepted by MNRAS. Full tables and additional plots included

References in corpus (21)

• Are the Magellanic Clouds on their First Passage about the Milky Way?
• The Second-Generation Guide Star Catalog: Description and Properties
• Clustering of Local Group distances: publication bias or correlated measurements? I. The Large Magellanic Cloud
• Black holes and core expansion in massive star clusters
• Starbursts triggered by inter-galactic tides and interstellar compressive turbulence
• Clustering of Local Group distances: publication bias or correlated measurements? III. The Small Magellanic Cloud
• Globular Cluster Systems in Giant Ellipticals: the Mass/Metallicity Relation
• The VMC Survey - XIV. First results on the look-back time star-formation rate tomography of the Small Magellanic Cloud
• Age distribution of young clusters and field stars in the SMC
• The VISCACHA survey - I. Overview and First Results
• SOAR Adaptive Module (SAM): seeing improvement with a UV laser
• The Effect of Orbital Eccentricity on the Dynamical Evolution of Star Clusters
• The Main Sequence of Star Clusters
• The VMC survey - XV. The Small Magellanic Cloud--Bridge connection history as traced by their star cluster populations
• A prescription and fast code for the long-term evolution of star clusters - III. Unequal masses and stellar evolution
• The Magellanic System: the puzzle of the leading gas stream
• The inefficiency of satellite accretion in forming extended star clusters
• Structural parameters of star clusters: relations among light, mass and star-count radial profiles and the dependence on photometric depth
• Two kinematically distinct old globular cluster populations in the Large Magellanic Cloud
• Characterizing low contrast Galactic open clusters with GAIA DR2
• Bruck 88 : a young star cluster with an old age resemblance in the outskirts of the Small Magellanic Cloud

Cited by in corpus (15)

• The VISCACHA survey -- IV. The SMC West Halo in 8D
• The VISCACHA survey -- III. Star clusters counterpart of the Magellanic Bridge and Counter-Bridge in 8D
• A new identity card for the bulge globular cluster NGC 6440 from resolved star counts
• Ca II Triplet Spectroscopy of Small Magellanic Cloud Red Giants. V. Abundances and Velocities for 12 Massive Clusters
• STEP Survey II: Structural Analysis of 170 star clusters in the SMC
• The VISCACHA survey -- VII. Assembly history of the Magellanic Bridge and SMC Wing from star clusters
• Determination of dynamical ages of open clusters through the A${}^{+}$ parameter -- I
• Investigating Galactic binary cluster candidates with Gaia EDR3
• Enlightening the dynamical evolution of Galactic open clusters: an approach using Gaia DR3 and analytical descriptions
• Ca II Triplet Spectroscopy of Small Magellanic Cloud Red Giants. VI. Analysis of chemical properties of the Main Body
• The VISCACHA survey -- VIII. Chemical evolution history of Small Magellanic Cloud West Halo cluster
• The VISCACHA survey -- V. Rejuvenating three faint SMC clusters
• Star cluster formation from giant molecular clouds in the Small Magellanic Cloud about 2 Gyr ago: their origin, structures, and kinematics
• Exploration of morphological coherence in open clusters with a "core-shell'' structure
• The VISCACHA Survey: XIII. The extended main-sequence turn-off in intermediate-age low-mass clusters