Characterizing ultra-faint dwarf galaxies with S-PLUS survey

• Grant number: 22/04079-0
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• Start date: August 10, 2022
• End date: December 30, 2022
• Field of knowledge: Physical Sciences and Mathematics - Astronomy
• Principal Investigator: Silvia Cristina Fernandes Rossi
• Grantee: Hélio Dotto Perottoni
• Supervisor: Teresa Antoja
• Host Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Institution abroad: Universitat de Barcelona (UB), Spain
• Associated to the scholarship: 18/21250-9 - Identification of bright ultra-metal-poor stars from Multi-Band photometry and spectroscopic follow-up, BP.PD

Abstract

Ultra-faint Dwarf Galaxies are essential objects for studying the early chemical evolution of the Universe, the first stars formed in the Universe, and for restricting models of galaxy formation and evolution. In this sense, the combination of multi-band photometric data and astrometric information from S-PLUS and Gaia, respectively, allows us to resolve these stellar populations of the nearest (within ~100 kpc) dwarf galaxies. The homogeneous determination of the metallicity distributions of these galaxies will significantly improve the statistics regarding the typical metal abundance of these kinds of systems. Moreover, we will be able to investigate the potential existence of internal metallicity gradients within these dwarf galaxies, an exercise made possible only by the combination between Gaia (which is necessary to confidently select member stars) and photometric data from a survey such as S-PLUS that contains metallicity-sensitive filters designed for the purpose of providing reasonable estimates of [Fe/H] for large numbers of stars. Finally, the most interesting targets will be selected for future high-resolution spectroscopic follow-up from the Southern Hemisphere in order to derive detailed elemental abundances of member stars of dwarf galaxies, enabling the reconstruction of their star-formation and chemical-enrichment histories as a whole. (AU)

Scientific publications

(6)

(The scientific publications listed on this page originate from the Web of Science or SciELO databases. Their authors have cited FAPESP grant or fellowship project numbers awarded to Principal Investigators or Fellowship Recipients, whether or not they are among the authors. This information is collected automatically and retrieved directly from those bibliometric databases.)

LIMBERG, GUILHERME; QUEIROZ, ANNA B. A.; PEROTTONI, HELIO D.; ROSSI, SILVIA; AMARANTE, JOAO A. S.; SANTUCCI, RAFAEL M.; CHIAPPINI, CRISTINA; PEREZ-VILLEGAS, ANGELES; LEE, YOUNG SUN. Phase-space Properties and Chemistry of the Sagittarius Stellar Stream Down to the Extremely Metal-poor ([Fe/H] less than or similar to-3) Regime. ASTROPHYSICAL JOURNAL, v. 946, n. 2, p. 15-pg., 2023-04-01. (22/04079-0, 18/21250-9, 15/50374-0, 14/18100-4, 21/10429-0, 22/07301-5)

BARBOSA, FABRICIA O.; SANTUCCI, RAFAEL M.; ROSSI, SILVIA; LIMBERG, GUILHERME; PEREZ-VILLEGAS, ANGELES; PEROTTONI, HELIO D.. The SDSS-Gaia View of the Color-Magnitude Relation for Blue Horizontal-branch Stars. ASTROPHYSICAL JOURNAL, v. 940, n. 1, p. 9-pg., 2022-11-01. (15/50374-0, 21/10429-0, 14/18100-4, 18/21250-9, 22/04079-0)

BORBOLATO, LAIS; PEROTTONI, HELIO D.; ROSSI, SILVIA; LIMBERG, GUILHERME; PEREZ-VILLEGAS, ANGELES; ANDERS, FRIEDRICH; ANTOJA, TERESA; LAPORTE, CHERVIN F. P.; ROCHA-PINTO, HELIO J.; SANTUCCI, RAFAEL M.. All-sky Kinematics and Chemistry of Monoceros Stellar Overdensity. ASTROPHYSICAL JOURNAL, v. 960, n. 1, p. 11-pg., 2024-01-01. (18/21250-9, 20/15245-2, 21/10429-0, 22/07301-5, 21/09967-8, 15/50374-0, 22/04079-0)

ABUCHAIM, YURI; PEROTTONI, HELIO D.; ROSSI, SILVIA; LIMBERG, GUILHERME; PEREZ-VILLEGAS, ANGELES; SANTUCCI, RAFAEL M.; PLACCO, VINICIUS M.; SALES-SILVA, JOAO V.; ANDERS, FRIEDRICH; ROCHA-PINTO, HELIO J.. The Chemodynamical Nature of the Triangulum-Andromeda Overdensity. ASTROPHYSICAL JOURNAL, v. 949, n. 2, p. 13-pg., 2023-06-01. (22/04079-0, 18/21250-9, 15/50374-0, 14/18100-4, 21/10429-0, 22/07301-5)

ALMEIDA-FERNANDES, F.; PLACCO, V. M.; ROCHA-PINTO, H. J.; FERNANDES, M. B.; LIMBERG, G.; SILVA, L. BERALDO E.; AMARANTE, J. A. S.; PEROTTONI, H. D.; OVERZIER, R.; SCHOENELL, W.; et al. Chemodynamical properties and ages of metal-poor stars in S-PLUS. Monthly Notices of the Royal Astronomical Society, v. 523, n. 2, p. 18-pg., 2023-05-30. (22/04079-0, 18/21250-9, 21/10429-0, 22/07301-5, 21/09468-1, 18/20977-2)

ANDERS, F.; GISPERT, P.; RATCLIFFE, B.; CHIAPPINI, C.; MINCHEV, I.; NEPAL, S.; QUEIROZ, A. B. A.; AMARANTE, J. A. S.; ANTOJA, T.; CASALI, G.; et al. Spectroscopic age estimates for APOGEE red-giant stars: Precise spatial and kinematic trends with age in the Galactic disc. Astronomy & Astrophysics, v. 678, p. 21-pg., 2023-10-18. (18/21250-9, 22/04079-0)