Photometry and kinematics of two minor merger candidate galaxies
Autor(a) principal: | |
---|---|
Data de Publicação: | 2007 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/108238 |
Resumo: | We observationally investigate the properties of disk galaxies undergoing minor merger or capture events. In this context, the properties of two double-nucleus candidate galaxies, ESO 381–IG23 andMCG 3-35-14, are analyzed. Both are disk-dominated Sc–Scd galaxies that show a bright knot superposed on their disk body. The size and surface brightness of these knots are in both cases comparable to those of the galaxy nucleus, which has led previous work to classify these galaxies as double-nucleus galaxies. We present results from observations made with the SOAR 4.1 m, CASLEO 2.15 m, and Bosque Alegre 1.54 m telescopes. We determined the values for the apparent and absolute magnitudes of the nuclei and the bright regions and analyzed the surface brightness profiles and colors. We also study the kinematics of the galaxies via their rotation curves. Analytical mass models were fitted under the constraints of both kinematic and photometric observational data. It is found that ESO 381–IG 23 has an absolute magnitude MB = −19:59 and mass M= (3.0±0.2) x 1010 Mʘ, and its nuclear spectrum shows strong emission lines typical of starbursts. MCG −3-35-14 has MB = 19.97 and M=(9.6 ± 0.5) x 1010 Mʘ. Both galaxies are morphologically normal disk galaxies. They have a bulge-to-disk ratio of ~0.1 and show no significant signatures of dynamical perturbation in their rotation curves. The secondary nuclei candidates are found to be giant H ii regions, rather than nuclei of captured companions. They have masses of (2.2±0.2) x 106 Mʘ (ESO 381–IG 23) and (4.1±0.2) x 106 Mʘ (MCG 3-35-14), and ages of 6.6±0.1 and 8.0±1.0 Myr, respectively. |
id |
UFRGS-2_16b80440fef24a99e2b0c6078312cfb5 |
---|---|
oai_identifier_str |
oai:www.lume.ufrgs.br:10183/108238 |
network_acronym_str |
UFRGS-2 |
network_name_str |
Repositório Institucional da UFRGS |
repository_id_str |
|
spelling |
Gimeno, GermánDottori, Horacio AlbertoDíaz, Rubén JoaquínRodrigues, IrapuanCarranza, Gustavo Jose2014-12-13T02:18:04Z20070004-6256http://hdl.handle.net/10183/108238000603934We observationally investigate the properties of disk galaxies undergoing minor merger or capture events. In this context, the properties of two double-nucleus candidate galaxies, ESO 381–IG23 andMCG 3-35-14, are analyzed. Both are disk-dominated Sc–Scd galaxies that show a bright knot superposed on their disk body. The size and surface brightness of these knots are in both cases comparable to those of the galaxy nucleus, which has led previous work to classify these galaxies as double-nucleus galaxies. We present results from observations made with the SOAR 4.1 m, CASLEO 2.15 m, and Bosque Alegre 1.54 m telescopes. We determined the values for the apparent and absolute magnitudes of the nuclei and the bright regions and analyzed the surface brightness profiles and colors. We also study the kinematics of the galaxies via their rotation curves. Analytical mass models were fitted under the constraints of both kinematic and photometric observational data. It is found that ESO 381–IG 23 has an absolute magnitude MB = −19:59 and mass M= (3.0±0.2) x 1010 Mʘ, and its nuclear spectrum shows strong emission lines typical of starbursts. MCG −3-35-14 has MB = 19.97 and M=(9.6 ± 0.5) x 1010 Mʘ. Both galaxies are morphologically normal disk galaxies. They have a bulge-to-disk ratio of ~0.1 and show no significant signatures of dynamical perturbation in their rotation curves. The secondary nuclei candidates are found to be giant H ii regions, rather than nuclei of captured companions. They have masses of (2.2±0.2) x 106 Mʘ (ESO 381–IG 23) and (4.1±0.2) x 106 Mʘ (MCG 3-35-14), and ages of 6.6±0.1 and 8.0±1.0 Myr, respectively.application/pdfengThe Astronomical journal. Chicago. Vol. 133, no. 5 (May 2007), p. 2327-2333Galáxias ativasRegiões HIINucleo galaticoEspectros astronômicosFotometria astronômicaGalaxies: kinematics and dynamicsGalaxies: nucleiGalaxies: spiralGalaxies: structure Online material: color figurePhotometry and kinematics of two minor merger candidate 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:UFRGSORIGINAL000603934.pdf000603934.pdfTexto completo (inglês)application/pdf318774http://www.lume.ufrgs.br/bitstream/10183/108238/1/000603934.pdfb77c24f66df0046527a5e5131b70cdcdMD51TEXT000603934.pdf.txt000603934.pdf.txtExtracted Texttext/plain32206http://www.lume.ufrgs.br/bitstream/10183/108238/2/000603934.pdf.txta1fb49f2fe8ef20034c1b3a87c7afb0aMD52THUMBNAIL000603934.pdf.jpg000603934.pdf.jpgGenerated Thumbnailimage/jpeg1968http://www.lume.ufrgs.br/bitstream/10183/108238/3/000603934.pdf.jpgd587c4660b98e40c8412cf3364529f5eMD5310183/1082382018-10-22 09:02:05.619oai:www.lume.ufrgs.br:10183/108238Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-22T12:02:05Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Photometry and kinematics of two minor merger candidate galaxies |
title |
Photometry and kinematics of two minor merger candidate galaxies |
spellingShingle |
Photometry and kinematics of two minor merger candidate galaxies Gimeno, Germán Galáxias ativas Regiões HII Nucleo galatico Espectros astronômicos Fotometria astronômica Galaxies: kinematics and dynamics Galaxies: nuclei Galaxies: spiral Galaxies: structure Online material: color figure |
title_short |
Photometry and kinematics of two minor merger candidate galaxies |
title_full |
Photometry and kinematics of two minor merger candidate galaxies |
title_fullStr |
Photometry and kinematics of two minor merger candidate galaxies |
title_full_unstemmed |
Photometry and kinematics of two minor merger candidate galaxies |
title_sort |
Photometry and kinematics of two minor merger candidate galaxies |
author |
Gimeno, Germán |
author_facet |
Gimeno, Germán Dottori, Horacio Alberto Díaz, Rubén Joaquín Rodrigues, Irapuan Carranza, Gustavo Jose |
author_role |
author |
author2 |
Dottori, Horacio Alberto Díaz, Rubén Joaquín Rodrigues, Irapuan Carranza, Gustavo Jose |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Gimeno, Germán Dottori, Horacio Alberto Díaz, Rubén Joaquín Rodrigues, Irapuan Carranza, Gustavo Jose |
dc.subject.por.fl_str_mv |
Galáxias ativas Regiões HII Nucleo galatico Espectros astronômicos Fotometria astronômica |
topic |
Galáxias ativas Regiões HII Nucleo galatico Espectros astronômicos Fotometria astronômica Galaxies: kinematics and dynamics Galaxies: nuclei Galaxies: spiral Galaxies: structure Online material: color figure |
dc.subject.eng.fl_str_mv |
Galaxies: kinematics and dynamics Galaxies: nuclei Galaxies: spiral Galaxies: structure Online material: color figure |
description |
We observationally investigate the properties of disk galaxies undergoing minor merger or capture events. In this context, the properties of two double-nucleus candidate galaxies, ESO 381–IG23 andMCG 3-35-14, are analyzed. Both are disk-dominated Sc–Scd galaxies that show a bright knot superposed on their disk body. The size and surface brightness of these knots are in both cases comparable to those of the galaxy nucleus, which has led previous work to classify these galaxies as double-nucleus galaxies. We present results from observations made with the SOAR 4.1 m, CASLEO 2.15 m, and Bosque Alegre 1.54 m telescopes. We determined the values for the apparent and absolute magnitudes of the nuclei and the bright regions and analyzed the surface brightness profiles and colors. We also study the kinematics of the galaxies via their rotation curves. Analytical mass models were fitted under the constraints of both kinematic and photometric observational data. It is found that ESO 381–IG 23 has an absolute magnitude MB = −19:59 and mass M= (3.0±0.2) x 1010 Mʘ, and its nuclear spectrum shows strong emission lines typical of starbursts. MCG −3-35-14 has MB = 19.97 and M=(9.6 ± 0.5) x 1010 Mʘ. Both galaxies are morphologically normal disk galaxies. They have a bulge-to-disk ratio of ~0.1 and show no significant signatures of dynamical perturbation in their rotation curves. The secondary nuclei candidates are found to be giant H ii regions, rather than nuclei of captured companions. They have masses of (2.2±0.2) x 106 Mʘ (ESO 381–IG 23) and (4.1±0.2) x 106 Mʘ (MCG 3-35-14), and ages of 6.6±0.1 and 8.0±1.0 Myr, respectively. |
publishDate |
2007 |
dc.date.issued.fl_str_mv |
2007 |
dc.date.accessioned.fl_str_mv |
2014-12-13T02:18:04Z |
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/10183/108238 |
dc.identifier.issn.pt_BR.fl_str_mv |
0004-6256 |
dc.identifier.nrb.pt_BR.fl_str_mv |
000603934 |
identifier_str_mv |
0004-6256 000603934 |
url |
http://hdl.handle.net/10183/108238 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
The Astronomical journal. Chicago. Vol. 133, no. 5 (May 2007), p. 2327-2333 |
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/10183/108238/1/000603934.pdf http://www.lume.ufrgs.br/bitstream/10183/108238/2/000603934.pdf.txt http://www.lume.ufrgs.br/bitstream/10183/108238/3/000603934.pdf.jpg |
bitstream.checksum.fl_str_mv |
b77c24f66df0046527a5e5131b70cdcd a1fb49f2fe8ef20034c1b3a87c7afb0a d587c4660b98e40c8412cf3364529f5e |
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_ |
1801224859739488256 |