Age and metallicity gradients of stellar clusters in the Magellanic Bridge

• Grant number: 18/22181-0
• Support Opportunities: Scholarships in Brazil - Doctorate
• Effective date (Start): March 01, 2019
• Effective date (End): March 31, 2023
• Field of knowledge: Physical Sciences and Mathematics - Astronomy - Stellar Astrophysics
• Principal Investigator: Beatriz Leonor Silveira Barbuy
• Grantee: Raphael Augusto Pereira de Oliveira
• Host Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 14/18100-4 - Stellar populations in the Milky Way: bulge, halo, disk and star forming regions; instrumentation for high resolution spectroscopy, AP.TEM

Abstract

The stellar clusters in the Magellanic System are very important for the determination of the star formation history and chemodynamical evolution of these two satellite galaxies. The analysis of their ages and chemical signatures is crucial to distinguish which is the correct model to explain the origin and evolution of the Magellanic Clouds-Milky Way system. There are currently two models: (i) the Magellanic Clouds were bound recently, ~ 2 Gyr ago; (ii) the Magellanic System is old and on its first its first passage across the Milky Way in the last ~ 2 Gyr. In this context, the stellar clusters of the Magellanic Bridge have been neglected in the literature. The determination of their metallicities and ages can bring evidence pointing towards one model or the other. To elucidate this question, we will analyse color-magnitude diagrams of a group of stellar clusters and associations along the Magellanic Bridge, homogeneously deriving their astrophysical parameters. Spectroscopic data of supergiant stars at high-resolution and fainter stars at medium resolution are also employed to define chemical abundances and kinematics of the targets. (AU)

Scientific publications

(5)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

OLIVEIRA, R. A. P.; SOUZA, S. O.; KERBER, L. O.; BARBUY, B.; ORTOLANI, S.; PIOTTO, G.; NARDIELLO, D.; PEREZ-VILLEGAS, A.; MAIA, F. F. S.; BICA, E.; et al. The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. XX. Ages of Single and Multiple Stellar Populations in Seven Bulge Globular Clusters. ASTROPHYSICAL JOURNAL, v. 891, n. 1, MAR 1 2020. (17/15893-1, 18/22044-3, 18/22181-0)

OLIVEIRA, R. A. P.; ORTOLANI, S.; BARBUY, B.; KERBER, L. O.; MAIA, F. F. S.; BICA, E.; CASSISI, S.; SOUZA, S. O.; PEREZ-VILLEGAS, A.. Precise distances from OGLE-IV member RR Lyrae stars in six bulge globular clusters. Astronomy & Astrophysics, v. 657, JAN 21 2022. (18/22181-0, 18/22044-3)

DIAS, B.; ANGELO, M. S.; OLIVEIRA, R. A. P.; MAIA, F.; PARISI, M. C.; DE BORTOLI, B.; SOUZA, S. O.; KATIME SANTRICH, O. J.; BASSINO, L. P.; BARBUY, B.; et al. The VISCACHA survey: III. Star clusters counterpart of the Magellanic Bridge and Counter-Bridge in 8D. Astronomy & Astrophysics, v. 647, MAR 17 2021. (18/22044-3, 18/22181-0)

BICA, EDUARDO; WESTERA, PIETER; KERBER, LEANDRO DE O.; DIAS, BRUNO; MAIA, FRANCISCO; SANTOS, JR., JOAO F. C.; BARBUY, BEATRIZ; OLIVEIRA, RAPHAEL A. P.. An Updated Small Magellanic Cloud and Magellanic Bridge Catalog of Star Clusters, Associations, and Related Objects. ASTRONOMICAL JOURNAL, v. 159, n. 3, MAR 2020. (18/05535-3, 18/22181-0)

SOUZA, S. O.; KERBER, L. O.; BARBUY, B.; PEREZ-VILLEGAS, A.; OLIVEIRA, R. A. P.; NARDIELLO, D.. Self-consistent Analysis of Stellar Clusters: An Application to HST Data of the Halo Globular Cluster NGC 6752. ASTROPHYSICAL JOURNAL, v. 890, n. 1, FEB 10 2020. (17/15893-1, 18/22044-3, 18/22181-0)