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| DOI | 10.1093/MNRAS/STZ2853 | ||||
| Año | 2020 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
The exploration of the spatial distribution of chemical abundances in star-forming regions of galactic discs can help us to understand the complex interplay of physical processes that regulate the star formation activity and the chemical enrichment across a galaxy. We study the azimuthal variations of the normalized oxygen abundance profiles in the highest numerical resolution run of the Evolution and Assembly of GaLaxies and their Environments (EAGLE) Project at z = 0. We use young stellar populations to trace the abundances of star-forming regions. Oxygen profiles are estimated along different line of sights from a centrally located observer. The mean azimuthal variation in the EAGLE discs are similar to 0.12 +/- 0.03 dex R-eff(-1) for slopes and similar to 0.12 +/- 0.03 dex for the zero-points, in agreement with previous works. Metallicity gradients measured along random directions correlate with those determined by averaging over the whole discs, although with a large dispersion. We find a slight trend for higher azimuthal variations in the disc components of low star-forming and bulge-dominated galaxies. We also investigate the metallicity profiles of stellar populations with higher and lower levels of enrichment than the average metallicity profiles, and we find that high star-forming regions with high metallicity tend to have slightly shallower metallicity slopes compared with the overall metallicity gradient. The simulated azimuthal variations in the EAGLE discs are in agreement with observations, although the large variety of metallicity gradients would encourage further exploration of the metal mixing in numerical simulations.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Solar, Martin | Hombre |
Universidad de Valparaíso - Chile
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| 2 | Tissera, Patricia | Mujer |
Universidad Nacional Andrés Bello - Chile
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| 3 | HERNANDEZ-JIMENEZ, JOSE ANDRES | Hombre |
Universidad Nacional Andrés Bello - Chile
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| Fuente |
|---|
| FONDECYT |
| Fondo Nacional de Desarrollo Científico y Tecnológico |
| Fondecyt Regular |
| Universidad Andrés Bello |
| STFC |
| Science and Technology Facilities Council |
| Fondo Nacional de Desarrollo CientÃfico y Tecnológico |
| BIS National E-infrastructure capital grant |
| Durham University |
| Horizon 2020 Framework Programme |
| European Union Horizon 2020 Research and Innovation Programme under the Marie Sklodowska-Curie grant |
| Marie Sklodowska-Curie |
| Universidad Andrés Bello |
| BIS National E-infrastructure capital |
| STFCDiRAC Operations grant |
| Internal Project Unab 2019 |
| CONICYT, Programa de Astronomia, Fondo ALMA-CONICYT 2017 |
| Agradecimiento |
|---|
| The authors thank A. Benitez-Llambay and J. Schaye for useful comments. JAHJ thanks CONICYT, Programa de Astronomia, Fondo ALMA-CONICYT 2017, Codigo de proyecto 31170038. PBT acknowledges partial funding by Fondecyt Regular 20151150334 and Internal Project Unab 2019. This project has received funding from the European Union Horizon 2020 Research and Innovation Programme under the Marie Sklodowska-Curie grant agreement No 734374. This work used the RAGNAR cluster funded by Fondecyt 1150334 and Universidad Andres Bello. This work used the DiRAC Data Centric system at Durham University, operated by the Institute for Computational Cosmology on behalf of the STFC DiRAC HPC Facility (www.dirac.ac.uk). This equipment was funded by BIS National E-infrastructure capital grant ST/K00042X/1, STFC capital grants ST/H008519/1 and ST/K00087X/1, STFCDiRAC Operations grant ST/K003267/1 and Durham University. DiRAC is part of the National E-Infrastructure. We acknowledge PRACE for awarding us access to the Curie machine based in France at TGCC, CEA, Bruyeres-le-Chatel. |
| The authors thank A. Benitez-Llambay and J. Schaye for useful comments. JAHJ thanks CONICYT, Programa de Astronomía, Fondo ALMA-CONICYT 2017, Código de proyecto 31170038. PBT acknowledges partial funding by Fondecyt Regular 2015– 1150334 and Internal Project Unab 2019. This project has received funding from the European Union Horizon 2020 Research and Innovation Programme under the Marie Sklodowska-Curie grant agreement No 734374. This work used the RAGNAR cluster funded by Fondecyt 1150334 and Universidad Andres Bello. This work used the DiRAC Data Centric system at Durham University, operated by the Institute for Computational Cosmology on behalf of the STFC DiRAC HPC Facility (www.dirac.ac.uk). This equipment was funded by BIS National E-infrastructure capital grant ST/K00042X/1, STFC capital grants ST/H008519/1 and ST/K00087X/1, STFC DiRAC Operations grant ST/K003267/1 and Durham University. DiRAC is part of the National E-Infrastructure. We acknowledge PRACE for awarding us access to the Curie machine based in France at TGCC, CEA, Bruyeres-le-Chatel. |