The VISCACHA survey - IX. The SMC Southern Bridge in 8D

M. C. Parisi, R. A.P. Oliveira, M. S. Angelo, B. Dias, F. F.S. Maia, S. Saroon, C. Feinstein, Jr F.C. Santos, E. Bica, B. Pereira Lima Ferreira, J. G. Fernandez-Trincado, P. Westera, D. Minniti, E. R. Garro, O. J.Katime Santrich, B. J. De Bortoli, S. O. Souza, L. Kerber, A. Pérez-Villegas

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

Resumen

The structure of the Small Magellanic Cloud (SMC) outside of its main body is characterized by tidal branches resulting from its interactions mainly with the Large Magellanic Cloud (LMC). Characterizing the stellar populations in these tidal components helps to understand the dynamical history of this galaxy and of the Magellanic system in general. We provide full phase- space vector information for Southern Bridge clusters. We performed a photometric and spectroscopic analysis of twelve SMC clusters, doubling the number of SMC clusters with full phase-space vector information known to date. We reclassify the sample considering 3D distances and 3D velocities. We found that some of the clusters classified as Southern Bridge objects according to the projected 2D classification actually belong to the Main Body and Counter-Bridge in the background. The comparison of the kinematics of the genuine foreground Bridge clusters with those previously analysed in the same way reveals that Southern Bridge clusters are moving towards the LMC and share the kinematics of the Northern Bridge. Adding to our sample clusters from the literature with CaT metallicity determinations we compare the age-metallicity relation of the Southern Bridge with the one of the Northern Bridge. We reinforce the idea that both regions do not seem to hav e e xperienced the same chemical enrichment history and that there is a clear absence of clusters in the Northern Bridge older than 3 Gyr and more metal poor than -1.1, which would not seem to be due to a selection effect.

Idioma originalInglés
Páginas (desde-hasta)10632-10648
Número de páginas17
PublicaciónMonthly Notices of the Royal Astronomical Society
Volumen527
N.º4
DOI
EstadoPublicada - 1 feb. 2024

Áreas temáticas de ASJC Scopus

  • Astronomía y astrofísica
  • Ciencias planetarias y espacial

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