ARE (pseudo)bulges in isolated galaxies actually primordial relics?

We present structural parameters and (g - i) bulge/disk colors for a large sample (189) of isolated AMIGA galaxies. The structural parameters of bulges were derived from the two-dimensional bulge/disk/bar decomposition of Sloan Digital Sky Survey i-band images using GALFIT. Galaxies were separated b...

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Detalles Bibliográficos
Autores: Fernández Lorenzo, M., Sulentic, J., Verdes-Montenegro, Lourdes, Blasco-Herrera, J., Argudo-Fernández, María, Garrido, Julián, Ramírez Moreta, Pablo, Ruíz, José Enrique, Sánchez-Expósito, S., Santander-Vela, Juan de Dios
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2014
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/400684
Acceso en línea:http://hdl.handle.net/10261/400684
Access Level:acceso abierto
Palabra clave:Galaxies: fundamental parameters
Galaxies: general
Galaxies: interactions
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spelling ARE (pseudo)bulges in isolated galaxies actually primordial relics?Fernández Lorenzo, M.Sulentic, J.Verdes-Montenegro, LourdesBlasco-Herrera, J.Argudo-Fernández, MaríaGarrido, JuliánRamírez Moreta, PabloRuíz, José EnriqueSánchez-Expósito, S.Santander-Vela, Juan de DiosGalaxies: fundamental parametersGalaxies: generalGalaxies: interactionsWe present structural parameters and (g - i) bulge/disk colors for a large sample (189) of isolated AMIGA galaxies. The structural parameters of bulges were derived from the two-dimensional bulge/disk/bar decomposition of Sloan Digital Sky Survey i-band images using GALFIT. Galaxies were separated between classical bulges (nb > 2.5) and pseudobulges (nb < 2.5), resulting in a dominant pseudobulge population (94%) with only 12 classical bulges. In the langμ e rang-R e plane, pseudobulges are distributed below the elliptical relation (smaller R e and fainter μ e ), with the closest region to the Kormendy relation populated by those pseudobulges with larger values of B/T. We derived (g - i) bulge colors using aperture photometry and find that pseudobulges show median colors (g - i) b ~ 1.06, while their associated disks are much bluer, (g - i) d ~ 0.77. Moreover, 64% (113/177) of pseudobulges follow the red sequence of early-type galaxies. Bluer pseudobulges tend to be located in galaxies with the highest likelihood of tidal perturbation. The red bulge colors and low B/T values for AMIGA isolated galaxies are consistent with an early formation epoch and not much subsequent growth. Properties of bulges in isolated galaxies contrast with a picture where pseudobulges grow continuously via star formation. They also suggest that environment could be playing a role in rejuvenating the pseudobulges. © 2014. The American Astronomical SocietyWe thank the referee for interest in the Letter and constructive reading and suggestions. This work has been supported by grant AYA2011-30491-C02-0S1 and the Junta de Andaluc´ıa (Spain) P08-FQM-4205 and TIC-114. Funding for SDSS-III has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, and the U.S. Department of Energy. The SDSS-III Web site is http://www.sdss3.org/.Peer reviewedAmerican Astronomical SocietyJunta de AndalucíaAlfred P. Sloan FoundationNational Science Foundation (US)Department of Energy (US)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252014info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/400684reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MICINN//AYA2011-30491-C02-0S1info:eu-repo/grantAgreement/Junta de Andalucía//P08-FQM-4205info:eu-repo/grantAgreement/Junta de Andalucía//TIC-114http://dx.doi.org/10.1088/2041-8205/788/2/L39Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4006842026-05-22T06:33:51Z
dc.title.none.fl_str_mv ARE (pseudo)bulges in isolated galaxies actually primordial relics?
title ARE (pseudo)bulges in isolated galaxies actually primordial relics?
spellingShingle ARE (pseudo)bulges in isolated galaxies actually primordial relics?
Fernández Lorenzo, M.
Galaxies: fundamental parameters
Galaxies: general
Galaxies: interactions
title_short ARE (pseudo)bulges in isolated galaxies actually primordial relics?
title_full ARE (pseudo)bulges in isolated galaxies actually primordial relics?
title_fullStr ARE (pseudo)bulges in isolated galaxies actually primordial relics?
title_full_unstemmed ARE (pseudo)bulges in isolated galaxies actually primordial relics?
title_sort ARE (pseudo)bulges in isolated galaxies actually primordial relics?
dc.creator.none.fl_str_mv Fernández Lorenzo, M.
Sulentic, J.
Verdes-Montenegro, Lourdes
Blasco-Herrera, J.
Argudo-Fernández, María
Garrido, Julián
Ramírez Moreta, Pablo
Ruíz, José Enrique
Sánchez-Expósito, S.
Santander-Vela, Juan de Dios
author Fernández Lorenzo, M.
author_facet Fernández Lorenzo, M.
Sulentic, J.
Verdes-Montenegro, Lourdes
Blasco-Herrera, J.
Argudo-Fernández, María
Garrido, Julián
Ramírez Moreta, Pablo
Ruíz, José Enrique
Sánchez-Expósito, S.
Santander-Vela, Juan de Dios
author_role author
author2 Sulentic, J.
Verdes-Montenegro, Lourdes
Blasco-Herrera, J.
Argudo-Fernández, María
Garrido, Julián
Ramírez Moreta, Pablo
Ruíz, José Enrique
Sánchez-Expósito, S.
Santander-Vela, Juan de Dios
author2_role author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Junta de Andalucía
Alfred P. Sloan Foundation
National Science Foundation (US)
Department of Energy (US)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Galaxies: fundamental parameters
Galaxies: general
Galaxies: interactions
topic Galaxies: fundamental parameters
Galaxies: general
Galaxies: interactions
description We present structural parameters and (g - i) bulge/disk colors for a large sample (189) of isolated AMIGA galaxies. The structural parameters of bulges were derived from the two-dimensional bulge/disk/bar decomposition of Sloan Digital Sky Survey i-band images using GALFIT. Galaxies were separated between classical bulges (nb > 2.5) and pseudobulges (nb < 2.5), resulting in a dominant pseudobulge population (94%) with only 12 classical bulges. In the langμ e rang-R e plane, pseudobulges are distributed below the elliptical relation (smaller R e and fainter μ e ), with the closest region to the Kormendy relation populated by those pseudobulges with larger values of B/T. We derived (g - i) bulge colors using aperture photometry and find that pseudobulges show median colors (g - i) b ~ 1.06, while their associated disks are much bluer, (g - i) d ~ 0.77. Moreover, 64% (113/177) of pseudobulges follow the red sequence of early-type galaxies. Bluer pseudobulges tend to be located in galaxies with the highest likelihood of tidal perturbation. The red bulge colors and low B/T values for AMIGA isolated galaxies are consistent with an early formation epoch and not much subsequent growth. Properties of bulges in isolated galaxies contrast with a picture where pseudobulges grow continuously via star formation. They also suggest that environment could be playing a role in rejuvenating the pseudobulges. © 2014. The American Astronomical Society
publishDate 2014
dc.date.none.fl_str_mv 2014
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/400684
url http://hdl.handle.net/10261/400684
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MICINN//AYA2011-30491-C02-0S1
info:eu-repo/grantAgreement/Junta de Andalucía//P08-FQM-4205
info:eu-repo/grantAgreement/Junta de Andalucía//TIC-114
http://dx.doi.org/10.1088/2041-8205/788/2/L39
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Astronomical Society
publisher.none.fl_str_mv American Astronomical Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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