Identification of giant stars for mapping our Galaxy in the S-PLUS survey

• Grant number: 18/20977-2
• Support type: Scholarships in Brazil - Post-Doctorate
• Effective date (Start): April 01, 2019
• Status: Discontinued
• Field of knowledge: Physical Sciences and Mathematics - Astronomy - Stellar Astrophysics
• Principal researcher: Claudia Lucia Mendes de Oliveira
• Grantee: Felipe de Almeida Fernandes
• Home Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 11/51680-6 - Exploring the universe: from the galaxies formation to Earth-like planets with the Giant Magellan Telescope, AP.ESP
• Associated scholarship(s): 21/09468-1 - Study of stellar populations in the S-PLUS survey, BE.EP.PD

Abstract

Galactic astronomy is a science that still offers a great number of open questions: such as the origin of the Galactic structures, in part related to their stellar distributions; the problem of the missing satellites; and the identification of new overdensities and further analysis of their nature. In this study, we approach this problem through the use of giant stars as tracers of stellar populations.In this context, the S-PLUS survey has unique characteristics that enable this study: the great number of photometric filters, which are, in many cases, centered in absorption lines that are important for stellar astrophysics; and the extensive sky coverage, that allows us to study Galactic structures sampled by different fields.In order to select the giant stars in the survey, we will employ four different techniques: photometric search technique, principal component analysis, neural network classification and reduced parallax technique. We will produce a catalog of giant stars observed by S-PLUS, that will be used in this study and made available for the scientific community for other studies.Our main goal is to use this catalog to find new overdensities in the Galaxy and adjust models to describe the density profiles of several galactic structures, which has the potential to shed light to their origins.

Scientific publications

(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)

WHITTEN, DEVIN D.; PLACCO, VINICIUS M.; BEERS, TIMOTHY C.; AN, DEOKKEUN; LEE, YOUNG SUN; ALMEIDA-FERNANDES, FELIPE; HERPICH, FABIO R.; DAFLON, SIMONE; BARBOSA, CARLOS E.; PEROTTONI, HELIO D.; et al. The Photometric Metallicity and Carbon Distributions of the Milky Way's Halo and Solar Neighborhood from S-PLUS Observations of SDSS Stripe 82. ASTROPHYSICAL JOURNAL, v. 912, n. 2, MAY 2021. (16/12331-0, 18/21661-9, 18/20977-2, 19/11910-4, 09/54202-8, 18/21250-9, 19/26492-3)

NAKAZONO, L.; DE OLIVEIRA, C. MENDES; HIRATA, N. S. T.; JERAM, S.; QUEIROZ, C.; EIKENBERRY, STEPHEN S.; GONZALEZ, A. H.; ABRAMO, R.; OVERZIER, R.; ESPADOTO, M.; et al. On the discovery of stars, quasars, and galaxies in the Southern Hemisphere with S-PLUS DR2. Monthly Notices of the Royal Astronomical Society, v. 507, n. 4, p. 5847-5868, NOV 2021. (18/09165-6, 19/06766-1, 19/10923-5, 15/22308-2, 19/26492-3, 18/20977-2, 14/10566-4, 19/01312-2, 18/25671-9, 19/23388-0, 17/25835-9, 15/11442-0, 16/12331-0)

SANTOS-SILVA, T.; PEROTTONI, H. D.; ALMEIDA-FERNANDES, F.; GREGORIO-HETEM, J.; JATENCO-PEREIRA, V; MENDES DE OLIVEIRA, C.; MONTMERLE, T.; BICA, E.; BONATTO, C.; MONTEIRO, H.; et al. Canis Major OB1 stellar group contents revealed by Gaia. Monthly Notices of the Royal Astronomical Society, v. 508, n. 1, p. 1033-1055, NOV 2021. (18/20977-2, 14/18100-4, 18/21250-9, 15/24946-6, 18/06822-6)