Metallicities and ages for 35 star clusters and their surrounding fields in the Small Magellanic Cloud

W. NARLOCH, G. PIETRZY\'NSKI, W. GIEREN, A.E. PIATTI, M. G\'ORSKI, P. KARCZMAREK, D. GRACZYK, K. SUCHOMSKA, B. ZGIRSKI, P. WIELG\'ORSKI, B. PILECKI, M. TAORMINA, M. KAłUSZY\'NSKI, W. PYCH, G. HAJDU, G. ROJAS GARCÍA

ASTRONOMY AND ASTROPHYSICS

EDP SCIENCES S A

Lugar: Paris; Año: 2021 vol. 647 p. 135 - 156

0004-6361

Aims. In this work we study 35 stellar clusters in the Small Magellanic Cloud (SMC) in order to provide their mean metallicities and ages. We also provide mean metallicities of the fields surrounding the clusters.Methods. We use Strömgren photometry obtained with 4.1-m SOAR telescope and take advantage of (b − y) and m1 colors for which exists metallicity calibration presented by Hilker (2000).Results. The spatial metallicity and age distributions of clusters across the SMC are investigated using the results obtained by Ström- gren photometry. We confirm earlier observations that younger, more metal-rich star clusters are concentrated in the central regions of the galaxy while older, more metal-poor are located farther from the SMC center. We construct the age?metallicity relation for the studied clusters and find a good agreement with theoretical models of chemical enrichment, as well as with other literature age and metallicity values for those clusters. We also provide the mean metallicities for old and young populations of the field stars surround- ing the clusters and find the latter in a good agreement with recent studies of the SMC Cepheid population. Finally, the Strömgren photometry obtained for this study is made publicly available.