The elliptical galaxy NGC 5044 : stellar population and ionized gas
Autor(a) principal: | |
---|---|
Data de Publicação: | 2004 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/98763 |
Resumo: | 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. |
id |
UFRGS-2_b1c26a6e584c5558ae8288e097c4a9cc |
---|---|
oai_identifier_str |
oai:www.lume.ufrgs.br:10183/98763 |
network_acronym_str |
UFRGS-2 |
network_name_str |
Repositório Institucional da UFRGS |
repository_id_str |
|
spelling |
Rickes, Mauro Cristian GarciaPastoriza, Miriani GriseldaBonatto, Charles Jose2014-07-26T02:09:16Z20040004-6361http://hdl.handle.net/10183/98763000504477In 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.application/pdfengAstronomy and Astrophysics. Berlin. Vol. 419, no. 2 (May 2004), p. 449-458Galáxias ativasNucleo galaticoEstrelas gigantesGas ionizadoPopulacoes estelaresGalaxies: elliptical and lenticular, cDGalaxies: individual: NGC5044Galaxies: fundamental parametersThe elliptical galaxy NGC 5044 : stellar population and ionized gasEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000504477.pdf000504477.pdfTexto completo (inglês)application/pdf437461http://www.lume.ufrgs.br/bitstream/10183/98763/1/000504477.pdfb9642b497cb623a3c2b1f11f98f5c1ffMD51TEXT000504477.pdf.txt000504477.pdf.txtExtracted Texttext/plain43851http://www.lume.ufrgs.br/bitstream/10183/98763/2/000504477.pdf.txta3385922e99f4bbe845edb54a711f237MD52THUMBNAIL000504477.pdf.jpg000504477.pdf.jpgGenerated Thumbnailimage/jpeg2091http://www.lume.ufrgs.br/bitstream/10183/98763/3/000504477.pdf.jpga7f7d26b8346ce5ce404b5741c946330MD5310183/987632023-07-15 03:26:51.727992oai:www.lume.ufrgs.br:10183/98763Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-15T06:26:51Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
The elliptical galaxy NGC 5044 : stellar population and ionized gas |
title |
The elliptical galaxy NGC 5044 : stellar population and ionized gas |
spellingShingle |
The elliptical galaxy NGC 5044 : stellar population and ionized gas Rickes, Mauro Cristian Garcia Galáxias ativas Nucleo galatico Estrelas gigantes Gas ionizado Populacoes estelares Galaxies: elliptical and lenticular, cD Galaxies: individual: NGC5044 Galaxies: fundamental parameters |
title_short |
The elliptical galaxy NGC 5044 : stellar population and ionized gas |
title_full |
The elliptical galaxy NGC 5044 : stellar population and ionized gas |
title_fullStr |
The elliptical galaxy NGC 5044 : stellar population and ionized gas |
title_full_unstemmed |
The elliptical galaxy NGC 5044 : stellar population and ionized gas |
title_sort |
The elliptical galaxy NGC 5044 : stellar population and ionized gas |
author |
Rickes, Mauro Cristian Garcia |
author_facet |
Rickes, Mauro Cristian Garcia Pastoriza, Miriani Griselda Bonatto, Charles Jose |
author_role |
author |
author2 |
Pastoriza, Miriani Griselda Bonatto, Charles Jose |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Rickes, Mauro Cristian Garcia Pastoriza, Miriani Griselda Bonatto, Charles Jose |
dc.subject.por.fl_str_mv |
Galáxias ativas Nucleo galatico Estrelas gigantes Gas ionizado Populacoes estelares |
topic |
Galáxias ativas Nucleo galatico Estrelas gigantes Gas ionizado Populacoes estelares Galaxies: elliptical and lenticular, cD Galaxies: individual: NGC5044 Galaxies: fundamental parameters |
dc.subject.eng.fl_str_mv |
Galaxies: elliptical and lenticular, cD Galaxies: individual: NGC5044 Galaxies: fundamental parameters |
description |
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. |
publishDate |
2004 |
dc.date.issued.fl_str_mv |
2004 |
dc.date.accessioned.fl_str_mv |
2014-07-26T02:09:16Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/98763 |
dc.identifier.issn.pt_BR.fl_str_mv |
0004-6361 |
dc.identifier.nrb.pt_BR.fl_str_mv |
000504477 |
identifier_str_mv |
0004-6361 000504477 |
url |
http://hdl.handle.net/10183/98763 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Astronomy and Astrophysics. Berlin. Vol. 419, no. 2 (May 2004), p. 449-458 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFRGS instname:Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS |
instname_str |
Universidade Federal do Rio Grande do Sul (UFRGS) |
instacron_str |
UFRGS |
institution |
UFRGS |
reponame_str |
Repositório Institucional da UFRGS |
collection |
Repositório Institucional da UFRGS |
bitstream.url.fl_str_mv |
http://www.lume.ufrgs.br/bitstream/10183/98763/1/000504477.pdf http://www.lume.ufrgs.br/bitstream/10183/98763/2/000504477.pdf.txt http://www.lume.ufrgs.br/bitstream/10183/98763/3/000504477.pdf.jpg |
bitstream.checksum.fl_str_mv |
b9642b497cb623a3c2b1f11f98f5c1ff a3385922e99f4bbe845edb54a711f237 a7f7d26b8346ce5ce404b5741c946330 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS) |
repository.mail.fl_str_mv |
|
_version_ |
1801224841937813504 |