The elliptical galaxy NGC 5044 : stellar population and ionized gas
dc.contributor.author | Rickes, Mauro Cristian Garcia | pt_BR |
dc.contributor.author | Pastoriza, Miriani Griselda | pt_BR |
dc.contributor.author | Bonatto, Charles Jose | pt_BR |
dc.date.accessioned | 2014-07-26T02:09:16Z | pt_BR |
dc.date.issued | 2004 | pt_BR |
dc.identifier.issn | 0004-6361 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/98763 | pt_BR |
dc.description.abstract | In this work we investigate the stellar population, metallicity distribution and ionized gas in the elliptical galaxy NGC 5044, using long-slit spectroscopy and a stellar population synthesis method. We found differences in the slope of metalline profiles along the galaxy which suggests an enhancement of α elements, particularly towards the central region. The stellar population synthesis showed that the component with [Z/Zѳ] ~ 0.0 dominates the λ5870 Å flux in the central region of NGC 5044, contributing with ~42% of the total flux, while in the external regions the contribution decreases to ~8.0%. The component with [Z/Zѳ] ~ −0.4 contributes with ~32% in the central region, and ~55% in the external regions. The component with [Z/Zѳ] ~ −1.1 contributes with ~26% in the central region, and ~37% in the external regions. The three components have ~10¹° years. The presence of a non-thermal ionization source, such as a low-luminosity AGN and/or shock ionization, is implied by the large values of the ratio [N II]/Hα observed in all sampled regions. However, the emission lines observed in the external regions indicate the presence of an additional ionization source, probably hot, post-AGB stars. | en |
dc.format.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | Astronomy and Astrophysics. Berlin. Vol. 419, no. 2 (May 2004), p. 449-458 | pt_BR |
dc.rights | Open Access | en |
dc.subject | Galaxies: elliptical and lenticular, cD | en |
dc.subject | Galáxias ativas | pt_BR |
dc.subject | Galaxies: individual: NGC5044 | en |
dc.subject | Nucleo galatico | pt_BR |
dc.subject | Galaxies: fundamental parameters | en |
dc.subject | Estrelas gigantes | pt_BR |
dc.subject | Gas ionizado | pt_BR |
dc.subject | Populacoes estelares | pt_BR |
dc.title | The elliptical galaxy NGC 5044 : stellar population and ionized gas | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 000504477 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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