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Planetary nebulae, stars and chemical evolution of stellar systems


This project continues the same research lines the members of the team have been working on during the last few years, aiming to describe the abundances and model the chemical evolution of galaxies, in particular the Milky Way, through the investigation of their distinct substructures. This will be done by deriving chemical abundances of photoionized nebulae and stars that can be seen as probes capable to describe the chemical evolution in distinct regions.We intend to investigate the distribution of chemical abundances of planetary nebulae in substructures of the Milky Way such as the bulge, the bulge-disk connection and the external edge of the disk. The derived results will be used as constraints to model the entire stellar system. Observational results analogous to those obtained for the Milky Way can be derived for other galaxies, deriving parameters that will be used as constraints to formulate generalized models to describe their evolution, as well as for specific models of galaxy bulges and disks. The derivation of ages of central stars of planetary nebulae and AGB stars will also contribute to the understanding of galactic chemical evolution, in particular the time evolution of the radial abundance gradient.Using modern observational resources such as optical interferometry, high angular resolution imaging and integral field spectroscopy, we intend to investigate the physical processes associated to the morphology of stellar envelopes and to the structure of spatially resolved planetary nebulae, describing more precisely the characteristics and evolution of these objects. (AU)

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Scientific publications (10)
(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)
ORTIZ, ROBERTO. A revised distance scale of planetary nebulae. Astronomy & Astrophysics, v. 560, . (10/18835-3)
CAVICHIA, O.; COSTA, R. D. D.; MACIEL, W. J.; MOLLA, M.. The population of planetary nebulae near the Galactic Centre: chemical abundances. Monthly Notices of the Royal Astronomical Society, v. 468, n. 1, p. 272-290, . (12/01017-1, 07/07704-2, 10/18835-3)
MOLLA, MERCEDES; CAVICHIA, OSCAR; GAVILAN, MARTA; GIBSON, BRAD K.. Galactic chemical evolution: stellar yields and the initial mass function. Monthly Notices of the Royal Astronomical Society, v. 451, n. 4, p. 3693-3708, . (09/54006-4, 12/01017-1, 10/18835-3, 12/22236-3)
LAGO, P. J. A.; COSTA, R. D. D.. NGC 2440: a morpho-kinematical model. REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA, v. 52, n. 2, p. 329-337, . (10/18835-3)
CAVICHIA, O.; MOLLA, M.; COSTA, R. D. D.; MACIEL, W. J.. The role of the Galactic bar in the chemical evolution of the Milky Way. Monthly Notices of the Royal Astronomical Society, v. 437, n. 4, p. 3688-3701, . (07/07704-2, 09/54006-4, 12/01017-1, 10/18835-3)
ORTIZ, R.; COPETTI, M. V. F.; LORENZ-MARTINS, S.. A distance scale of planetary nebulae based on mid-infrared data. Monthly Notices of the Royal Astronomical Society, v. 418, n. 3, p. 2004-2013, . (10/18835-3)
PINHEIRO, M. C.; ORTIZ, R.; ABRAHAM, Z.; COPETTI, M. V. F.. Photometric and Spectroscopic Survey of the Cluster [DBS2003] 156 Associated with the H II Region G331.1-0.5. Publications of the Astronomical Society of the Pacific, v. 128, n. 963, . (15/00890-1, 10/18835-3, 13/23786-0)
ORTIZ, ROBERTO; GUERRERO, MARTIN A.. Ultraviolet emission from main-sequence companions of AGB stars. Monthly Notices of the Royal Astronomical Society, v. 461, n. 3, p. 3036-3046, . (15/00890-1, 10/18835-3)
KOVTYUKH, V. V.; ANDRIEVSKY, S. M.; MARTIN, R. P.; KOROTIN, S. A.; LEPINE, J. R. D.; MACIEL, W. J.; KEIR, L. E.; PANKO, E. A.. Elemental abundances in the centre of the Galactic nuclear disc. Monthly Notices of the Royal Astronomical Society, v. 489, n. 2, p. 2254-2260, . (10/18835-3, 18/04562-7)
LAGO, P. J. A.; COSTA, R. D. D.; FAUNDEZ-ABANS, M.; MACIEL, W. J.. The case of NGC 6302: the impact of shocks in the derivation of nitrogen abundances. Monthly Notices of the Royal Astronomical Society, v. 489, n. 2, p. 2923-2929, . (10/18835-3)

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