The VISCACHA survey - I. Overview and First Results

Abstract

The VISCACHA (VIsible Soar photometry of star Clusters in tApii and Coxi HuguA) Survey is an ongoing project based on deep photometric observations of Magellanic Cloud star clusters, collected using the SOuthern Astrophysical Research (SOAR) telescope together with the SOAR Adaptive Module Imager. Since 2015 more than 200 hours of telescope time were used to observe about 130 stellar clusters, most of them with low mass (M < 10${}^4$ M${}_{\odot }$) and/or located in the outermost regions of the Large Magellanic Cloud and the Small Magellanic Cloud. With this high quality data set, we homogeneously determine physical properties from statistical analysis of colour-magnitude diagrams, radial density profiles, luminosity functions and mass functions. Ages, metallicities, reddening, distances, present-day masses, mass function slopes and structural parameters for these clusters are derived and used as a proxy to investigate the interplay between the environment in the Magellanic Clouds and the evolution of such systems. In this first paper we present the VISCACHA Survey and its initial results, concerning the SMC clusters AM3, K37, HW20 and NGC796 and the LMC ones KMHK228, OHSC3, SL576, SL61 and SL897, chosen to compose a representative subset of our cluster sample. The project's long term goals and legacy to the community are also addressed.

21 pages, 21 figures

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Cited by in corpus (10)

• 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
• The VISCACHA survey -- II. Structure of star clusters in the Magellanic Clouds periphery
• STEP Survey II: Structural Analysis of 170 star clusters in the SMC
• A genuine Large Magellanic Cloud age gap star cluster
• The VISCACHA survey -- VIII. Chemical evolution history of Small Magellanic Cloud West Halo cluster
• Astrophysical properties of newly discovered Magellanic Cloud star clusters
• Revisiting newly Large Magellanic Cloud age gap star clusters
• The VISCACHA survey -- V. Rejuvenating three faint SMC clusters
• On the structure of Small Magellanic Cloud star clusters