Graduate in Physics at Instituto de Física, Universidade de São Paulo (1977), MSc in Astronomy at Universidade de São Paulo (1983) and PhD in Astronomy at Universidade de São Paulo (1991). Has experience in Astronomy, focusing on Stellar Astrophysics, acting on the following subjects: metal-poor stars, metal abundances, Galctoc Halo, Spectroscopy, and Population II stars. (Source: Lattes Curriculum)
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The project aims at the participation on the design, construction and scientific use of the MOSAIC spectrograph, to be installed at the Extremely Large Telescope (ELT), the largest optical telescope ever planned, with a mirror of 39m in diameter, being installed in Chile. The excellent quality and future impact in the brazilian astronomical instrumentation and science is at a low cost as …
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 ba…
With its 39m primary mirror, the ESO Extremely Large Telescope (E-ELT) will be the largest optical/nearinfrared telescope ever built. MOSAIC (Multi-Object Spectrograph for Astrophysics, Inter-galactic medium studies and Cosmology) is expected to become the E-ELT´s workhorse instrument for astrophysics, intergalactic medium studies and cosmology in the coming decades. MOSAIC will fully exp…
We present an analysis of a new, large sample of field blue-straggler stars (BSSs) in the thick disk and halo system of the Galaxy, based on stellar spectra obtained during the Sloan Digital Sky Survey (SDSS) and the Sloan Extension for Galactic Understanding and Exploration (SEGUE). Using estimates of stellar atmospheric parameters obtained from application of the SEGUE Stellar Parameter…
Metal-poor stars hold the key to our understanding of the origin of the elements and the chemical evolution of the Universe. We are focused on improving the process of discovery of these rare stars, studying their surface abundances (produced in supernovae and other evolved stars) determined from the analysis of their spectra, and on the interpretation of their abundance patterns to eluc…
(Only some records are available in English at this moment)
The Milky Way hierarchical formation scenario is currently supported by the detection of numerous substructures resulting from accretion events. With the advent of Gaia astrometry, combined with high-precision spectroscopic data, we have confirmed that the inner part of the halo is dominated by an accreted dwarf galaxy, Gaia-Sausage/Enceladus, in addition to the detection of many other st…
The assembly and evolution of galaxies in cosmological context remains one of the greatest challenges in contemporaneous Astrophysics. Within the › cold dark matter paradigm, galaxies and their respective dark matter halos grow in size through successive merging with other such systems. In this hierarchical framework, the milky way's halo provide the best available laboratory for us to be…
The main goal of this project is to find UltraMetal-Poor Stars in the photometric surveys forfuture statistical studies. With the advent of SDSS, SkyMapper, Pan-STARRS, DES, LSST andJPAS (in two-three years time scale), etc, there is a large archival source for developing newtechniques (e.g. artificial neural network) for finding low-metallicity stars. The identifiedobjects will ultimatel…
Abstract: The aim is to investigate astronomical science performance, by carrying out simulations of the MOSAIC spectrograph, by characterizing the performance of optical and near-infrared fibres, design of slit-unit prototype and test set-up, slit unit performance tests. The scientific aim is spectroscopy of distant stars, globular clusters and integrated light of galaxies.Objectives: Sc…
(Only some records are available in English at this moment)
Within this ongoing FAPESP-funded PhD (Proc. 2021/10429-0), we are studying the chemical and dynamical (or simply "chemodynamical") structure of the ancient Galactic halo and the properties of its stellar populations, providing clues about the sequence of merging events that took place throughout the history of the Milky Way. Here, we propose a one-year Research Internship Abroad (RIA) at…
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 n…
This proposal seeks to discover (and re-discover) metal-poor stars in the Galaxy, by means of spectroscopic analysis, ranging from low- to high-resolution observations. These discoveries will be made by continuing the efforts started in 2007, which selected a sample of thousands of carbon-enhanced metal-poor star candidates, based on their low-resolution spectra from objective-prism plate…
A proposal is made to identify and analyze up to several thousand carbon-enhanced stars in the Milky Way galaxy, based on medium-resolution stellar spectroscopy and broadband ugriz photometry obtained with the Sloan Digital Sky Survey (both the former survey now known as SDSS-I and its extension, known as SDSS-II, which includes the project SEGUE: Sloan Extension for Galactic Understandin…
| 2 / 2 | Ongoing research grants |
| 20 / 13 | Completed research grants |
| 1 / 1 | Ongoing scholarships in Brazil |
| 13 / 9 | Completed scholarships in Brazil |
| 1 / 1 | Ongoing scholarships abroad |
| 8 / 3 | Completed scholarships abroad |
| 45 / 29 | All research grants and scholarships |
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CV Lattes
ORCID