| Apresentação/Painel: | |
| Autor: | André de Castro Milone1 |
|
Mauro Rickes2,3
|
|
|
Miriani Pastoriza3
|
|
| Instituição: | 1INPE/MCT - São José dos Campos |
| 2UFRGS - Porto Alegre | |
| 3UFSC - Florianópolis | |
| Formato: | Painel |
| Título: | Stellar populations in the kinematical subsystem to two nearby ellipticals |
| Resumo: | The spatial distributions of the mean luminosity-weighted stellar age, metallicity, and alpha/Fe ratio along both photometric axes of two nearby elliptical galaxies (NGC1052 and NGC7796) have been obtained using Lick index measurements on long slit spectra (1.60m telescope of OPD/LNA) in order to reconstruct the star formation history in their kinematically distinct subsystems. Lick indexes were compared with those of single-aged stellar population models. A population synthesis method was also applied in order to help disentangling the age-metallicity degeneracy of the line-strength indexes. The star characteristics in those galaxies are associated with the kinematics: they are older and alpha-enhanced in the not rotating bulge of NGC1052 and counter rotating core of NGC7796, while there are a strong spread of alpha/Fe and age along the rotating disk of NGC1052 and an outwards radial decreasing of both outside the core of NGC7796. |
OPD, SOAR e Gemini:
Passado, Presente e Futuro
Página inicial • Apresentaçães • Mesas Redondas • Paineis • Participantes
Índice de autores • Comitês • Galeria I • Galeria II • Galeria III • Apoio Financeiro