The plane W(Na I) x W (Mg I) : effects of interstellar Na I in a sample of southern galaxies
Autor(a) principal: | |
---|---|
Data de Publicação: | 1991 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/107729 |
Resumo: | Galaxy spectra from a subsample of the Southern Sky Redshift Survey data bank were used to study the equivalent width plane for the lines Na I λ 5893 Å vs Mg I λ 5175 Å. We try to estimate how important the contribution of the interstellar gas for the sodium line is compared to that of the stellar population. The sample is made up of galaxies with morphological types from E to Se and are distributed up to radial velocities of 25 000 km s-ˡ , most of them smaller than 15 000 km s-ˡ. Most early type galaxies with dust lanes, particularly nearly edge-on SO's, present an enhancement of the Na I line. Inclined spiral galaxies tend to present enhanced Na I with respect to face-on spirals. This tendency, previously found in a smaller sample of galaxies limited to V≤6000 km s-ˡ,is now confirmed for more distant ones. In the large velocity sample we are observing the global bulge rather than the very nucleus; the persistence of the effect suggests that the scale height of the gas layer in the central disk can reach a considerable fraction of the bulge radius. |
id |
UFRGS-2_37f05fef949856c1ad883a6eed4c73ce |
---|---|
oai_identifier_str |
oai:www.lume.ufrgs.br:10183/107729 |
network_acronym_str |
UFRGS-2 |
network_name_str |
Repositório Institucional da UFRGS |
repository_id_str |
|
spelling |
Bica, Eduardo Luiz DamianiPastoriza, Miriani GriseldaMaia, Marcio Antonio GeimbaSilva, Luiz Augusto Leitão daDottori, Horacio Alberto2014-12-04T02:13:38Z19910004-6256http://hdl.handle.net/10183/107729000055290Galaxy spectra from a subsample of the Southern Sky Redshift Survey data bank were used to study the equivalent width plane for the lines Na I λ 5893 Å vs Mg I λ 5175 Å. We try to estimate how important the contribution of the interstellar gas for the sodium line is compared to that of the stellar population. The sample is made up of galaxies with morphological types from E to Se and are distributed up to radial velocities of 25 000 km s-ˡ , most of them smaller than 15 000 km s-ˡ. Most early type galaxies with dust lanes, particularly nearly edge-on SO's, present an enhancement of the Na I line. Inclined spiral galaxies tend to present enhanced Na I with respect to face-on spirals. This tendency, previously found in a smaller sample of galaxies limited to V≤6000 km s-ˡ,is now confirmed for more distant ones. In the large velocity sample we are observing the global bulge rather than the very nucleus; the persistence of the effect suggests that the scale height of the gas layer in the central disk can reach a considerable fraction of the bulge radius.application/pdfengThe Astronomical journal. Woodbury. Vol. 102, no. 5 (Nov. 1991), p. 1702-1714Materia interestelarGalaxias espiraisAstrofisica extragalaticaThe plane W(Na I) x W (Mg I) : effects of interstellar Na I in a sample of southern galaxiesEstrangeiroinfo: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:UFRGSORIGINAL000055290.pdf000055290.pdfTexto completo (inglês)application/pdf337255http://www.lume.ufrgs.br/bitstream/10183/107729/1/000055290.pdf59b6c0acb6fc4cad92ce78ae1fe57e67MD51TEXT000055290.pdf.txt000055290.pdf.txtExtracted Texttext/plain286http://www.lume.ufrgs.br/bitstream/10183/107729/2/000055290.pdf.txt90c2c5f8c4fb5599a0ae95ccf267ce58MD52THUMBNAIL000055290.pdf.jpg000055290.pdf.jpgGenerated Thumbnailimage/jpeg2147http://www.lume.ufrgs.br/bitstream/10183/107729/3/000055290.pdf.jpg6908186ec1be16f517826b4f6500e08fMD5310183/1077292024-04-11 06:26:10.99558oai:www.lume.ufrgs.br:10183/107729Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2024-04-11T09:26:10Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
The plane W(Na I) x W (Mg I) : effects of interstellar Na I in a sample of southern galaxies |
title |
The plane W(Na I) x W (Mg I) : effects of interstellar Na I in a sample of southern galaxies |
spellingShingle |
The plane W(Na I) x W (Mg I) : effects of interstellar Na I in a sample of southern galaxies Bica, Eduardo Luiz Damiani Materia interestelar Galaxias espirais Astrofisica extragalatica |
title_short |
The plane W(Na I) x W (Mg I) : effects of interstellar Na I in a sample of southern galaxies |
title_full |
The plane W(Na I) x W (Mg I) : effects of interstellar Na I in a sample of southern galaxies |
title_fullStr |
The plane W(Na I) x W (Mg I) : effects of interstellar Na I in a sample of southern galaxies |
title_full_unstemmed |
The plane W(Na I) x W (Mg I) : effects of interstellar Na I in a sample of southern galaxies |
title_sort |
The plane W(Na I) x W (Mg I) : effects of interstellar Na I in a sample of southern galaxies |
author |
Bica, Eduardo Luiz Damiani |
author_facet |
Bica, Eduardo Luiz Damiani Pastoriza, Miriani Griselda Maia, Marcio Antonio Geimba Silva, Luiz Augusto Leitão da Dottori, Horacio Alberto |
author_role |
author |
author2 |
Pastoriza, Miriani Griselda Maia, Marcio Antonio Geimba Silva, Luiz Augusto Leitão da Dottori, Horacio Alberto |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Bica, Eduardo Luiz Damiani Pastoriza, Miriani Griselda Maia, Marcio Antonio Geimba Silva, Luiz Augusto Leitão da Dottori, Horacio Alberto |
dc.subject.por.fl_str_mv |
Materia interestelar Galaxias espirais Astrofisica extragalatica |
topic |
Materia interestelar Galaxias espirais Astrofisica extragalatica |
description |
Galaxy spectra from a subsample of the Southern Sky Redshift Survey data bank were used to study the equivalent width plane for the lines Na I λ 5893 Å vs Mg I λ 5175 Å. We try to estimate how important the contribution of the interstellar gas for the sodium line is compared to that of the stellar population. The sample is made up of galaxies with morphological types from E to Se and are distributed up to radial velocities of 25 000 km s-ˡ , most of them smaller than 15 000 km s-ˡ. Most early type galaxies with dust lanes, particularly nearly edge-on SO's, present an enhancement of the Na I line. Inclined spiral galaxies tend to present enhanced Na I with respect to face-on spirals. This tendency, previously found in a smaller sample of galaxies limited to V≤6000 km s-ˡ,is now confirmed for more distant ones. In the large velocity sample we are observing the global bulge rather than the very nucleus; the persistence of the effect suggests that the scale height of the gas layer in the central disk can reach a considerable fraction of the bulge radius. |
publishDate |
1991 |
dc.date.issued.fl_str_mv |
1991 |
dc.date.accessioned.fl_str_mv |
2014-12-04T02:13:38Z |
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/10183/107729 |
dc.identifier.issn.pt_BR.fl_str_mv |
0004-6256 |
dc.identifier.nrb.pt_BR.fl_str_mv |
000055290 |
identifier_str_mv |
0004-6256 000055290 |
url |
http://hdl.handle.net/10183/107729 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
The Astronomical journal. Woodbury. Vol. 102, no. 5 (Nov. 1991), p. 1702-1714 |
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/10183/107729/1/000055290.pdf http://www.lume.ufrgs.br/bitstream/10183/107729/2/000055290.pdf.txt http://www.lume.ufrgs.br/bitstream/10183/107729/3/000055290.pdf.jpg |
bitstream.checksum.fl_str_mv |
59b6c0acb6fc4cad92ce78ae1fe57e67 90c2c5f8c4fb5599a0ae95ccf267ce58 6908186ec1be16f517826b4f6500e08f |
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_ |
1801224858557743104 |