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Stellar populations in the Milky Way: bulge, halo, disk and star forming regions; instrumentation for high resolution spectroscopy

Grant number: 14/18100-4
Support type:Research Projects - Thematic Grants
Duration: February 01, 2016 - January 31, 2022
Field of knowledge:Physical Sciences and Mathematics - Astronomy - Stellar Astrophysics
Principal Investigator:Beatriz Leonor Silveira Barbuy
Grantee:Beatriz Leonor Silveira Barbuy
Home Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Co-Principal Investigators:Silvia Cristina Fernandes Rossi
Assoc. researchers:Alan Alves Brito ; Annibal Hetem Junior ; Bruno Vaz Castilho de Souza ; Charles Jose Bonato ; Clemens Darvin Gneiding ; Elisabetta Caffau ; Evelyne Alecian ; François Spite ; Jane Cristina Gregorio-Hetem ; Jorge Luis Melendez Moreno ; Leandro de Oliveira Kerber ; Martin Asplund ; Misha Haywood ; Monique Spite ; Paola Di Matteo ; Piercarlo Bonifacio ; Sergio Ortolani ; Silvia Cristina Fernandes Rossi ; Vanessa Bawden de Paula Macanhan ; Vinicius Moris Placco
Associated grant(s):18/05866-0 - XXXth IAU General Assembly of the International Astronomical Union, AR.EXT
16/24814-5 - Star clusters as tracers of formation and evolution of the Galactic bulge and Magellanic Clouds: modeling of data from the Hubble Space Telescope, SOAR, Gemini and Very Large Telescope., AV.BR
16/24313-6 - Chemodynamical evolution of the galactic bulge: review article for the Annual Review of Astronomy & Astrophysics, AV.EXT
Associated scholarship(s):19/25062-5 - Searching for peculiar features in the gas around young stellar clusters, BP.MS
18/22044-3 - Bulge globular clusters: relics of the early formation of the galaxy, BP.DD
18/22181-0 - Age and metallicity gradients of stellar clusters in the Magellanic Bridge, BP.DR
+ associated scholarships 18/05535-3 - The study of the Magellanic Clouds and its link with the Milky Way is the objective of this project, including in particular the formation and dissolution of globular clusters., BP.PD
17/15893-1 - Globular cluster orbits of bulge: the formation and evolution of the Milky Way, BP.PD
16/20566-7 - Colour-magnitude diagrams of globular clusters with ultraviolet filters of the Hubble Space Telescope, BP.IC - associated scholarships

Abstract

The main aim of this project is to study the stellar populations and structure of the Milky Way, in order to better understand its formation and evolution. The targets are stars of the Galactic Bulge, Halo and Disk. The bulge is studied in terms of the chemical composition of individual stars, as well as kinematics and ages of field and globular cluster stars. The interplay between the bar and the oldest globular clusters trapped in the bar is studied by deriving their proper motions and distance. The final goal is to know if the metal-poor stars in the bulge are the oldest in the Galaxy, as this would confirm that the bulge formed first. The Galactic halo is studied through the most metal-poor stars, by carrying out abundance analysis. A selection of new targets, in particular carbon-rich metal-poor stars, is also carried out based on large surveys (Sloan Digital Sky Survey and Hamburg/ESO survey). For both the halo and bulge, the abundance pattern of the metal-poor stars ([Fe/H]=-1.0 in the bulge, and [Fe/H] < -2.0 in the halo) give information on the nature of the first supernovae, that produced the chemical enrichment of the gas from which these stars formed. The Galactic disk is studied through a) old super metal-rich stars that seem to have migrated from the inner parts of the Galaxy; b) metal-rich M dwarfs; c) young stars and star forming regions. The group is expert in spectroscopy of cool stars, using low-resolution spectroscopy for selecting targets, and high spectral resolution for abundance analysis and radial velocity derivation. On the theoretical side, we select atomic and molecular data, including computation of hyperfine structure, and molecular constants, and produce line lists that are checked by comparison with spectra of well-known stars such as the Sun and Arcturus. For this, we use model atmospheres to compute synthetic spectra that are compared with the observed ones. We also produce composite spectra of integrated stellar populations, and intend to use integral field spectroscopy. In the study of star clusters, we also use imaging in optical and near-infrared colors, to produce colour-magnitude diagrams, and deduce their ages. For star forming regions, X-ray data from the satellites XMM-Newton and Chandra have been obtained, in order to identify young stars. Instrumentation is an important part of this project, with mainly the development of the CUBES spectrograph for the VLT/ESO, but also the ECHARPE spectrograph for the OPD/LNA/MCTI, and the MOSAIC multi-object spectrograph for the E-ELT. The CUBES spectrograph is at a stage that needs Research & Development on the ultraviolet properties of new CCD detectors, and on new gratings appropriate to the ultraviolet. These studies are useful for any present/future instrument in the ultraviolet. The MOSAIC spectrograph involves Brazilian expertise on optical fibers. (AU)

Matéria(s) publicada(s) na Agência FAPESP sobre o auxílio:
Study explains how the Seagull nebula was formed 
Articles published in other media outlets (66 total):
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UOL: Asas abertas: estudo explica origem de nebulosa em forma de gaivota (11/Jan/2020)
BOL: Asas abertas: estudo explica origem de nebulosa em forma de gaivota (11/Jan/2020)
Portal Exame: Estudo explica como se formou a nebulosa da Gaivota (10/Jan/2020)
UOL: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
BOL: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Portal Exame: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Agência Brasil: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
IstoÉ online: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
IstoÉ Dinheiro online: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Agrosoft: A nebulosa da Gaivota (18/Apr/2020)
Alô Tatuapé: Estudo explica como se formou a nebulosa da Gaivota (30/Mar/2020)
Gazeta de Piracicaba: Nebulosa da gaivota (12/Jan/2020)
Plantão News (MT): Estudo explica como se formou a nebulosa da Gaivota (12/Jan/2020)
Sociedade Científica: Estudo explica como se formou a nebulosa da Gaivota (12/Jan/2020)
Espaço Ecológico no Ar: Estudo da revista Astronomy & Astrophysics explica como se formou a nebulosa da Gaivota (11/Jan/2020)
MSN: Estudo explica como se formou a nebulosa da Gaivota (10/Jan/2020)
Espaço Ecológico no Ar: Astrônomas da USP desvendam mistérios das ‘asas’ da nebulosa da Gaivota (21/Dec/2019)
Metro Jornal online: Astrônoma da USP lidera equipe que descobre origem de nebulosa (14/Dec/2019)
Brasil CT&I: Explosões de supernovas revelam origem de concha estelar gigante (13/Dec/2019)
IE - Instituto de Engenharia: Explosões de supernovas revelam origem de concha estelar gigante (12/Dec/2019)
JC Notícias (São Paulo, SP): Explosões de supernovas revelam origem de concha estelar gigante (12/Dec/2019)
Diário Comercial : Astrônoma da USP lidera a equipe que descobre a origem de nebulosa (12/Dec/2019)
Agência USP de Inovação: Explosões de supernovas revelam origem de concha estelar gigante (12/Dec/2019)
Diário da Região (São José do Rio Preto, SP) online: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
A Crítica (MS) online: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Rondônia Dinâmica: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Jornal Dia Dia: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Planeta Osasco: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Jornal Floripa: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Cenário MT: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Jornal Extra de Alagoas online: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Painel Notícias: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Jornal da USP online: Explosões de supernovas revelam origem de Concha Estelar gigante (11/Dec/2019)
Casa de Notícias: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Planeta online: Cientistas da USP desvendam origem das “asas” da nebulosa da Gaivota (11/Dec/2019)
Diga Bahia: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Acorda Cidade: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Notícias ao Minuto: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Click Guarulhos: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Amazônia Brasil Rádio Web: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Poliarquia: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
SBT Interior: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Mix Vale: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Portal de Notícias: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Voz do Bico: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
BHAZ: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Portal Agora no RS: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Brasil Soberano e Livre: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
A Semana News: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
VoxMS: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
O Bom da Notícia: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Correio de Notícias (PR): Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Ribeirão Web News: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Jornal do Ônibus (MT): Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Liberdades: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Portal Alô News: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Jornal Fatos & Notícias: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Bananal Online: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
RedeTV (Porto Velho, RO): Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
DestakNews Brasil: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Portal Lacerdense: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Diário Piauí: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Diário do Cotidiano: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
O Jornaleiro: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Novo Cantu Notícias: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)
Minha Capital: Astrônoma da USP lidera equipe que descobre origem de nebulosa (11/Dec/2019)

Scientific publications (15)
(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)
EZZEDDINE, RANA; RASMUSSEN, KAITLIN; FREBEL, ANNA; CHITI, ANIRUDH; HINOJISA, KARINA; PLACCO, VINICIUS M.; JI, ALEXANDER P.; BEERS, TIMOTHY C.; HANSEN, TERESE T.; ROEDERER, IAN U.; SAKARI, CHARLI M.; MELENDEZ, JORGE. TheR-Process Alliance: First Magellan/MIKE Release from the Southern Search forR-process-enhanced Stars{*}. ASTROPHYSICAL JOURNAL, v. 898, n. 2 AUG 2020. Web of Science Citations: 0.
BENSBY, T.; FELTZING, S.; YEE, J. C.; JOHNSON, J. A.; GOULD, A.; ASPLUND, M.; MELENDEZ, J.; LUCATELLO, S. Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars VII. Lithium. Astronomy & Astrophysics, v. 634, FEB 25 2020. Web of Science Citations: 0.
CARLOS, MARILIA; MELENDEZ, JORGE; DO NASCIMENTO, JR., JOSE-DIAS; CASTRO, MATTHIEU. Li abundances for solar twins in the open cluster M67. Monthly Notices of the Royal Astronomical Society, v. 492, n. 1, p. 245-249, FEB 2020. Web of Science Citations: 0.
HETEM, ANNIBAL; GREGORIO-HETEM, JANE. Fractal statistics in young star clusters: structural parameters and dynamical evolution. Monthly Notices of the Royal Astronomical Society, v. 490, n. 2, p. 2521-2541, DEC 2019. Web of Science Citations: 0.
MOURA, T. C.; TREVISAN, M.; BARBUY, B.; ROSSI, S. Integrated Spectra of Milky Way Globular Clusters. ASTROPHYSICAL JOURNAL, v. 885, n. 1 NOV 1 2019. Web of Science Citations: 0.
FERNANDES, B.; MONTMERLE, T.; SANTOS-SILVA, T.; GREGORIO-HETEM, J. Runaways and shells around the CMa OB1 association. Astronomy & Astrophysics, v. 628, AUG 6 2019. Web of Science Citations: 1.
REGGIANI, HENRIQUE; AMARSI, ANISH M.; LIND, KARIN; BARKLEM, PAUL S.; ZATSARINNY, OLEG; BARTSCHAT, KLAUS; FURSA, V, DMITRY; BRAY, IGOR; SPINA, LORENZO; MELENDEZ, JORGE. Non-LTE analysis of K I in late-type stars. Astronomy & Astrophysics, v. 627, JUL 22 2019. Web of Science Citations: 0.
CARLOS, M.; MELENDEZ, J.; SPINA, L.; DOS SANTOS, L. A.; BEDELL, M.; RAMIREZ, I.; ASPLUND, M.; BEAN, J. L.; YONG, D.; YANA GALARZA, J.; ALVES-BRITO, A. The Li-age correlation: the Sun is unusually Li deficient for its age. Monthly Notices of the Royal Astronomical Society, v. 485, n. 3, p. 4052-4059, MAY 2019. Web of Science Citations: 1.
CAIN, MADELYN; FREBEL, ANNA; GULL, MAUDE; JI, ALEXANDER P.; PLACCO, VINICIUS M.; BEERS, TIMOTHY C.; MELENDEZ, JORGE; EZZEDDINE, RANA; CASEY, ANDREW R.; HANSEN, TERESE T.; ROEDERER, IAN U.; SAKARI, CHARLI. The R-Process Alliance: Chemical Abundances for a Trio of r-process-enhanced Stars-One Strong, One Moderate, and One Mild. ASTROPHYSICAL JOURNAL, v. 864, n. 1 SEP 1 2018. Web of Science Citations: 2.
CARLOS, MARILIA; KARAKAS, AMANDA I.; COHEN, JUDITH G.; KOBAYASHI, CHIAKI; MELENDEZ, JORGE. A Formation Timescale of the Galactic Halo from Mg Isotopes in Dwarf Stars. ASTROPHYSICAL JOURNAL, v. 856, n. 2 APR 1 2018. Web of Science Citations: 1.
REGGIANI, HENRIQUE; MELENDEZ, JORGE. Evidences of extragalactic origin and planet engulfment in the metal-poor twin pair HD 134439/HD 134440. Monthly Notices of the Royal Astronomical Society, v. 475, n. 3, p. 3502-3510, APR 2018. Web of Science Citations: 3.
SANTOS-SILVA, T.; GREGORIO-HETEM, J.; MONTMERLE, T.; FERNANDES, B.; STELZER, B. Star formation history of Canis Major OB1 II. A bimodal X-ray population revealed by XMM-Newton. Astronomy & Astrophysics, v. 609, FEB 1 2018. Web of Science Citations: 1.
REGGIANI, HENRIQUE; MELENDEZ, JORGE; KOBAYASHI, CHIAKI; KARAKAS, AMANDA; PLACCO, VINICIUS. Constraining cosmic scatter in the Galactic halo through a differential analysis of metal-poor stars. Astronomy & Astrophysics, v. 608, DEC 5 2017. Web of Science Citations: 11.
BENSBY, T.; FELTZING, S.; GOULD, A.; YEE, J. C.; JOHNSON, J. A.; ASPLUND, M.; MELENDEZ, J.; LUCATELLO, S.; HOWES, L. M.; MCWILLIAM, A.; UDALSKI, A.; SZYMANSKI, M. K.; SOSZYNSKI, I.; POLESKI, R.; WYRZYKOWSKI, L.; ULACZYK, K.; KOZLOWSKI, S.; PIETRUKOWICZ, P.; SKOWRON, J.; MROZ, P.; PAWLAK, M.; ABE, F.; ASAKURA, Y.; BHATTACHARYA, A.; BOND, I. A.; BENNETT, D. P.; HIRAO, Y.; NAGAKANE, M.; KOSHIMOTO, N.; SUMI, T.; SUZUKI, D.; TRISTRAM, P. J.; COLLABORATION, OGLE; COLLABORATION, MOA. Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars VI. Age and abundance structure of the stellar populations in the central sub-kpc of the Milky Way. Astronomy & Astrophysics, v. 605, SEP 2017. Web of Science Citations: 46.
FISHLOCK, C. K.; YONG, D.; KARAKAS, A. I.; ALVES-BRITO, A.; MELENDEZ, J.; NISSEN, P. E.; KOBAYASHI, C.; CASEY, A. R. Sc and neutron-capture abundances in Galactic low- and high-alpha field halo stars. Monthly Notices of the Royal Astronomical Society, v. 466, n. 4, p. 4672-4682, MAY 2017. Web of Science Citations: 8.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.