The physical parameters of the evolving population of faint galaxies
Autor(a) principal: | |
---|---|
Data de Publicação: | 1998 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/88766 |
Resumo: | The excess number of blue galaxies at faint magnitudes is a subject of much controversy. Recent Hubble Space Telescope results have revealed a plethora of galaxies with peculiar morphologies tentatively identified as the evolving population. We report the results of optical spectroscopy and near-infrared photometry of a sample of faint HST galaxies from the Medium Deep Survey to ascertain the physical properties of the faint morphological populations. We find four principal results. First, the population of objects classified as ‘peculiar’ are intrinsically luminous in the optical (MB ~ -19). Secondly these systems tend to be strong sources of [O II] line luminosity. Thirdly the optical–infrared colours of the faint population (a) confirm the presence of a population of compact blue galaxies and (b) show the stellar populations of irregular/peculiar galaxies encompass a wide range in age. Finally a surface-brightness comparison with the local galaxy sample of Frei et al. shows that these objects are not of anomalously low surface brightness, rather we find that all morphological classes have evolved to a higher surface brightness at higher redshifts (z > 0:3). |
id |
UFRGS-2_49277767a86e81fcf08b089a4237c2f8 |
---|---|
oai_identifier_str |
oai:www.lume.ufrgs.br:10183/88766 |
network_acronym_str |
UFRGS-2 |
network_name_str |
Repositório Institucional da UFRGS |
repository_id_str |
|
spelling |
Glazebrook, KarlAbraham, Roberto G.Santiago, Basilio XavierEllis, Richard S.Griffiths, Richard E.2014-03-21T01:49:01Z19980035-8711http://hdl.handle.net/10183/88766000234187The excess number of blue galaxies at faint magnitudes is a subject of much controversy. Recent Hubble Space Telescope results have revealed a plethora of galaxies with peculiar morphologies tentatively identified as the evolving population. We report the results of optical spectroscopy and near-infrared photometry of a sample of faint HST galaxies from the Medium Deep Survey to ascertain the physical properties of the faint morphological populations. We find four principal results. First, the population of objects classified as ‘peculiar’ are intrinsically luminous in the optical (MB ~ -19). Secondly these systems tend to be strong sources of [O II] line luminosity. Thirdly the optical–infrared colours of the faint population (a) confirm the presence of a population of compact blue galaxies and (b) show the stellar populations of irregular/peculiar galaxies encompass a wide range in age. Finally a surface-brightness comparison with the local galaxy sample of Frei et al. shows that these objects are not of anomalously low surface brightness, rather we find that all morphological classes have evolved to a higher surface brightness at higher redshifts (z > 0:3).application/pdfengMonthly Notices of the Royal Astronomical Society. London. Vol. 297, no. 3 (July 1998), p. 885-904Astrofisica extragalaticaCosmologiaEvolucao galaticaHubble space telescopeSurveysGalaxies: evolutionGalaxies: peculiarGalaxies: structureCosmology: observationsThe physical parameters of the evolving population of faint 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:UFRGSORIGINAL000234187.pdf000234187.pdfTexto completo (inglês)application/pdf676482http://www.lume.ufrgs.br/bitstream/10183/88766/1/000234187.pdf6a16b25b1729f0df93d5ac89ebe0f10aMD51TEXT000234187.pdf.txt000234187.pdf.txtExtracted Texttext/plain89438http://www.lume.ufrgs.br/bitstream/10183/88766/2/000234187.pdf.txtc25357ffc72ad59b0070aa0bc06e8c21MD52THUMBNAIL000234187.pdf.jpg000234187.pdf.jpgGenerated Thumbnailimage/jpeg1956http://www.lume.ufrgs.br/bitstream/10183/88766/3/000234187.pdf.jpg7af24900053fedb621d03627e2d62242MD5310183/887662023-07-05 03:50:02.367666oai:www.lume.ufrgs.br:10183/88766Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-05T06:50:02Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
The physical parameters of the evolving population of faint galaxies |
title |
The physical parameters of the evolving population of faint galaxies |
spellingShingle |
The physical parameters of the evolving population of faint galaxies Glazebrook, Karl Astrofisica extragalatica Cosmologia Evolucao galatica Hubble space telescope Surveys Galaxies: evolution Galaxies: peculiar Galaxies: structure Cosmology: observations |
title_short |
The physical parameters of the evolving population of faint galaxies |
title_full |
The physical parameters of the evolving population of faint galaxies |
title_fullStr |
The physical parameters of the evolving population of faint galaxies |
title_full_unstemmed |
The physical parameters of the evolving population of faint galaxies |
title_sort |
The physical parameters of the evolving population of faint galaxies |
author |
Glazebrook, Karl |
author_facet |
Glazebrook, Karl Abraham, Roberto G. Santiago, Basilio Xavier Ellis, Richard S. Griffiths, Richard E. |
author_role |
author |
author2 |
Abraham, Roberto G. Santiago, Basilio Xavier Ellis, Richard S. Griffiths, Richard E. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Glazebrook, Karl Abraham, Roberto G. Santiago, Basilio Xavier Ellis, Richard S. Griffiths, Richard E. |
dc.subject.por.fl_str_mv |
Astrofisica extragalatica Cosmologia Evolucao galatica Hubble space telescope |
topic |
Astrofisica extragalatica Cosmologia Evolucao galatica Hubble space telescope Surveys Galaxies: evolution Galaxies: peculiar Galaxies: structure Cosmology: observations |
dc.subject.eng.fl_str_mv |
Surveys Galaxies: evolution Galaxies: peculiar Galaxies: structure Cosmology: observations |
description |
The excess number of blue galaxies at faint magnitudes is a subject of much controversy. Recent Hubble Space Telescope results have revealed a plethora of galaxies with peculiar morphologies tentatively identified as the evolving population. We report the results of optical spectroscopy and near-infrared photometry of a sample of faint HST galaxies from the Medium Deep Survey to ascertain the physical properties of the faint morphological populations. We find four principal results. First, the population of objects classified as ‘peculiar’ are intrinsically luminous in the optical (MB ~ -19). Secondly these systems tend to be strong sources of [O II] line luminosity. Thirdly the optical–infrared colours of the faint population (a) confirm the presence of a population of compact blue galaxies and (b) show the stellar populations of irregular/peculiar galaxies encompass a wide range in age. Finally a surface-brightness comparison with the local galaxy sample of Frei et al. shows that these objects are not of anomalously low surface brightness, rather we find that all morphological classes have evolved to a higher surface brightness at higher redshifts (z > 0:3). |
publishDate |
1998 |
dc.date.issued.fl_str_mv |
1998 |
dc.date.accessioned.fl_str_mv |
2014-03-21T01:49:01Z |
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/10183/88766 |
dc.identifier.issn.pt_BR.fl_str_mv |
0035-8711 |
dc.identifier.nrb.pt_BR.fl_str_mv |
000234187 |
identifier_str_mv |
0035-8711 000234187 |
url |
http://hdl.handle.net/10183/88766 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Monthly Notices of the Royal Astronomical Society. London. Vol. 297, no. 3 (July 1998), p. 885-904 |
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/10183/88766/1/000234187.pdf http://www.lume.ufrgs.br/bitstream/10183/88766/2/000234187.pdf.txt http://www.lume.ufrgs.br/bitstream/10183/88766/3/000234187.pdf.jpg |
bitstream.checksum.fl_str_mv |
6a16b25b1729f0df93d5ac89ebe0f10a c25357ffc72ad59b0070aa0bc06e8c21 7af24900053fedb621d03627e2d62242 |
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_ |
1801224828334637056 |