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

João F.C. Santos, Francisco F.S. Maia, Bruno Dias, Leandro De O. Kerber, Andrés E. Piatti, Eduardo Bica, Mateus S. Angelo, Dante Minniti, Angeles Pérez-Villegas, Alexandre Roman-Lopes, Pieter Westera, Luciano Fraga, Bruno Quint, David Sanmartim

Resultado de la investigación: Contribución a una revistaArtículo de revisiónrevisión exhaustiva

2 Citas (Scopus)

Resumen

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 ∼200° and about ∼5° 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.

Idioma originalInglés
Páginas (desde-hasta)205-222
Número de páginas18
PublicaciónMonthly Notices of the Royal Astronomical Society
Volumen498
N.º1
DOI
EstadoPublicada - 1 oct 2020

Áreas temáticas de ASJC Scopus

  • Astronomía y astrofísica
  • Ciencias planetarias y espacial

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