Silvia Cristina Fernandes Rossi
CV Lattes
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Universidade de São Paulo (USP). Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG) (Institutional affiliation for the last research proposal) Birthplace: Brazil
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)
| News published in Agência FAPESP Newsletter about the researcher |
| Milky Way formed stars from inside out |
- Mosaic: the multi-object spectrograph for the ESO Extremely Large Telescope, AP.TEM
Abstract
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 e...
- Stellar populations in the Milky Way: bulge, halo, disk and star forming regions; instrumentation for high resolution spectroscopy, AP.TEM
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 ...
- The frequency of field blue-straggler stars in the thick disk and halo system of the galaxy, PUB.ART
Abstract
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 Paramet...
- Metal-poor stars and their role in the Universe, AP.R
Abstract
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 el...
- Searches for metal-poor stars from the Hamburg/ESO survey using the CH G band, PUB.ART
Abstract
We describe a new method to search for metal-poor candidates from the Hamburg/ESO objective-prism survey(HES) based on identifying stars with apparently strong CH G-band strengths for their colors. The hypothesis we exploit is that large overabundances of carbon are common among metal-poor stars, as has been found by numerous studies over the past two decades. The selection was made by ...
(Only some records are available in English at this moment)
- Identification of bright ultra-metal-poor stars from Multi-Band photometry and spectroscopic follow-up, BP.PD
Abstract
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 ultimat...
- Modeling integrated spectra of globular clusters and galaxies, BP.PD
Abstract
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: ...
- S-process in extremely metal-poor stars, BP.PD
Abstract
The atmospheres of low metallicity stars possess clues about the nucleosynthetic processes occurring in the early stages of our Galaxy. Since large sky surveys using low and medium resolution spectroscopy have been produced, a large number of metal-poor stars have been catalogued and analyzed in detail. The abundances of several elements obtained using high resolution spectra have shown...
- Metallicity calibration of metal-poor sub-dwarf M stars based on binary companions, BP.MS
Abstract
The low-mass stars are the most numerous stellar objects in the Galaxy with main sequence lifetimes that exceed the current age of the universe. Thus, they are great laboratories for studying the structure and evolution of the Galaxy. As the low-mass stars are becoming increasingly important sites to look for planets, the observational efficiency of such searches can be greatly enhanced...
- The Milky Way halo revisited, BP.PD
Abstract
The main goal of this project is to gather all the relevant information concerning the Milky Way Halo and, through the analysis of available databases in the literature and the observation of pre-selected objects, contribute to the understanding of this peculiar Galactic component. Over the last few years, surveys such as the SDSS (Sloan Digital Sky Survey), increased the number of stel...
(Only some records are available in English at this moment)
- (Re)Discovery and analysis of metal-poor stars in the Milky Way, BE.EP.PD
Abstract
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 pla...
- Refined estimation of the metallicity and carbon abundances for stars observed as part of the JINA (Joint Institute for Nuclear Astrophysics)-suppported SEGUE project, BE.PQ
Abstract
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 Understand...
| 2 / 2 | Ongoing research grants |
| 19 / 12 | Completed research grants |
| 2 / 2 | Ongoing scholarships in Brazil |
| 10 / 6 | Completed scholarships in Brazil |
| 7 / 2 | Completed scholarships abroad |
| 40 / 24 | All research grants and scholarships |
| Associated processes | |
(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)
| Publications | 9 |
| Citations | 239 |
| Cit./Article | 26.6 |
| Data from Web of Science | |
ALLEN, D. M.; RYAN, S. G.; ROSSI, S.; BEERS, T. C.; TSANGARIDES, S. A.. Elemental abundances and classification of carbon-enhanced metal-poor stars. Astronomy & Astrophysics, v. 548, DEC 2012. Web of Science Citations: 38. (08/01265-0)
PLACCO, VINICIUS M.; FREBEL, ANNA; BEERS, TIMOTHY C.; KARAKAS, AMANDA I.; KENNEDY, CATHERINE R.; ROSSI, SILVIA; CHRISTLIEB, NORBERT; STANCLIFFE, RICHARD J.. METAL-POOR STARS OBSERVED WITH THE MAGELLAN TELESCOPE. I. CONSTRAINTS ON PROGENITOR MASS AND METALLICITY OF AGB STARS UNDERGOING s-PROCESS NUCLEOSYNTHESIS. ASTROPHYSICAL JOURNAL, v. 770, n. 2, JUN 20 2013. Web of Science Citations: 36. (10/08996-0, 12/13722-1)
PLACCO, VINICIUS M.; FREBEL, ANNA; BEERS, TIMOTHY C.; CHRISTLIEB, NORBERT; LEE, YOUNG SUN; KENNEDY, CATHERINE R.; ROSSI, SILVIA; SANTUCCI, RAFAEL M.. METAL-POOR STARS OBSERVED WITH THE MAGELLAN TELESCOPE. II. DISCOVERY OF FOUR STARS WITH [Fe/H] <=-3.5. ASTROPHYSICAL JOURNAL, v. 781, n. 1, JAN 20 2014. Web of Science Citations: 25. (12/13722-1)
LEE, YOUNG SUN; BEERS, TIMOTHY C.; MASSERON, THOMAS; PLEZ, BERTRAND; ROCKOSI, CONSTANCE M.; SOBECK, JENNIFER; YANNY, BRIAN; LUCATELLO, SARA; SIVARANI, THIRUPATHI; PLACCO, VINICIUS M.; et al. CARBON-ENHANCED METAL-POOR STARS IN SDSS/SEGUE. I. CARBON ABUNDANCE ESTIMATION AND FREQUENCY OF CEMP STARS. ASTRONOMICAL JOURNAL, v. 146, n. 5, NOV 2013. Web of Science Citations: 77. (12/13722-1)
CRUZ, MONIQUE A.; COGO-MOREIRA, HUGO; ROSSI, SILVIA. Searching for chemical classes among metal-poor stars using medium-resolution spectroscopy. Monthly Notices of the Royal Astronomical Society, v. 475, n. 4, p. 4781-4793, APR 2018. Web of Science Citations: 3. (13/16924-7)
PLACCO, VINICIUS M.; KENNEDY, CATHERINE R.; ROSSI, SILVIA; BEERS, TIMOTHY C.; LEE, YOUNG SUN; CHRISTLIEB, NORBERT; SIVARANI, THIRUPATHI; REIMERS, DIETER; WISOTZKI, LUTZ. A SEARCH FOR UNRECOGNIZED CARBON-ENHANCED METAL-POOR STARS IN THE GALAXY. ASTRONOMICAL JOURNAL, v. 139, n. 3, p. 1051-1065, MAR 2010. Web of Science Citations: 17. (07/04356-3)
PLACCO, VINICIUS M.; KENNEDY, CATHERINE R.; BEERS, TIMOTHY C.; CHRISTLIEB, NORBERT; ROSSI, SILVIA; SIVARANI, THIRUPATHI; LEE, YOUNG SUN; REIMERS, DIETER; WISOTZKI, LUTZ. SEARCHES FOR METAL-POOR STARS FROM THE HAMBURG/ESO SURVEY USING THE CH G BAND. ASTRONOMICAL JOURNAL, v. 142, n. 6, DEC 2011. Web of Science Citations: 27. (07/04356-3, 10/08996-0)
ALLEN, D. M.; PORTO DE MELLO, G. F.. Mn, Cu, and Zn abundances in barium stars and their correlations with neutron capture elements. Astronomy & Astrophysics, v. 525, JAN 2011. Web of Science Citations: 16. (08/01265-0)
DE CARVALHO, R. R.; COSTA, A. P.; MOURA, T. C.; RIBEIRO, A. L. B.. The mass density profile and star formation history of Gaussian and non-Gaussian clusters. Monthly Notices of the Royal Astronomical Society, v. 487, n. 1, p. L86-L90, JUL 2019. Web of Science Citations: 0. (14/11156-4, 18/03480-7)