| Grant number: | 21/08813-7 |
| Support Opportunities: | Scholarships abroad - Research |
| Effective date (Start): | July 18, 2022 |
| Effective date (End): | July 17, 2023 |
| Field of knowledge: | Physical Sciences and Mathematics - Astronomy - Extragalactic Astrophysics |
| Principal Investigator: | Paula Rodrigues Teixeira Coelho |
| Grantee: | Paula Rodrigues Teixeira Coelho |
| Host Investigator: | Andrés Javier Cenarro Lagunas |
| Host Institution: | Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil |
| Research place: | Centro de Estudios de Física del Cosmos de Aragón (CEFCA), Spain |
Abstract Chemical abundances are used in galactic archeology techniques to infer the formation and evolution of the components in our Galaxy, stellar populations and galaxies in general. So far, chemical archeology studies have largely required the use of spectral data. Yet, the novel photometric survey J-PAS, with its system of 54 narrow-band filters, will effectively provide low resolution spectra for millions of stars and galaxies in the years to come. The current project aims at expanding chemical analysis of stellar populations beyond the study of spectra, by making use of the spectral energy distribution observed by J-PAS, the J-spectra. Tailored stellar population models will be required, varying the chemical abundances of interest, Mg, C, N, Ca and He. Stellar spectra will be modelled with different abundance patterns and synthesized into integrated light to represent simple stellar populations. Synthetic photometry will be performed to transform the new models into the J-PAS magnitudes. Studies will be performed to identify the colours (and combination of colours) which maximize the signal of each of the studied abundances. The models will be compared with already existing data to assess the ability in reproducing the loci of stars and galaxies in different colour-colour spaces. When suitable combinations of models and colours are achieved, a first application in search of the signal of multiple populations in extragalactic globular clusters will be performed. We expect this project to have a long-lasting legacy, as it provides a first framework for chemical archeological studies with J-PAS data. (AU) | |
| News published in Agência FAPESP Newsletter about the scholarship: | |
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