A combined photometric and kinematic recipe for evaluating the nature of bulges using the CALIFA sample
Understanding the nature of bulges in disc galaxies can provide important insights into the formation and evolution of galaxies. For instance, the presence of a classical bulge suggests a relatively violent history. In contrast, the presence of an inner disc instead (also referred to as a >pseudo...
| Autores: | , , , , , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2017 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/167345 |
| Acceso en línea: | http://hdl.handle.net/10261/167345 |
| Access Level: | acceso abierto |
| Palabra clave: | Galaxies: photometry Galaxies: structure Galaxies: kinematics and dynamics Galaxies: bulges |
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A combined photometric and kinematic recipe for evaluating the nature of bulges using the CALIFA sampleNeumann, J.Wisotzki, L.Choudhury, O.S.Gadotti, D.A.Walcher, C.J.Bland-Hawthorn, J.García-Benito, RubénGonzález Delgado, Rosa M.Husemann, B.Marino, R.A.Márquez, IsabelSánchez, S.F.Ziegler, B.Galaxies: photometryGalaxies: structureGalaxies: kinematics and dynamicsGalaxies: bulgesUnderstanding the nature of bulges in disc galaxies can provide important insights into the formation and evolution of galaxies. For instance, the presence of a classical bulge suggests a relatively violent history. In contrast, the presence of an inner disc instead (also referred to as a >pseudobulge>) indicates the occurrence of secular evolution processes in the main disc. However, we still lack criteria to effectively categorise bulges, limiting our ability to study their impact on the evolution of the host galaxies. Here we present a recipe to separate inner discs from classical bulges by combining four different parameters from photometric and kinematic analyses: the bulge Sérsic index n, the concentration index C, the Kormendy (1977, ApJ, 217, 406) relation and the inner slope of the radial velocity dispersion profile σ. With that recipe we provide a detailed bulge classification for a sample of 45 galaxies from the integral-field spectroscopic survey CALIFA. To aid in categorising bulges within these galaxies, we perform 2D image decomposition to determine bulge Sérsic index, bulge-to-total light ratio, surface brightness and effective radius of the bulge and use growth curve analysis to derive a new concentration index, C. We further extract the stellar kinematics from CALIFA data cubes and analyse the radial velocity dispersion profile. The results of the different approaches are in good agreement and allow a safe classification for approximately 95% of the galaxies. In particular, we show that our new >inner> concentration index performs considerably better than the traditionally used C when yielding the nature of bulges. We also found that a combined use of this index and the Kormendy relation gives a very robust indication of the physical nature of the bulge.© ESO, 2017.R.G.B. and R.G.D. acknowledge support from grants AYA2014-57490-P and JA-FQM-2828. R.A.M. acknowledges support by the Swiss National Science Foundation. I.M. acknowledges financial support from grants AYA2013-42227-P and AYA2016-76682-C3-1-P. SFS thanks the CONACYT-125180, DGAPA-IA100815 and DGAPA-IA101217 projects for providing him support in this study.Peer ReviewedEDP SciencesSwiss National Science FoundationMinisterio de Ciencia e Innovación (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2018201820172018info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/167345reponame: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/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2014-57490-Pinfo:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2013-42227-Pinfo:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2016-76682-C3-1-PSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1673452026-05-22T06:33:51Z |
| dc.title.none.fl_str_mv |
A combined photometric and kinematic recipe for evaluating the nature of bulges using the CALIFA sample |
| title |
A combined photometric and kinematic recipe for evaluating the nature of bulges using the CALIFA sample |
| spellingShingle |
A combined photometric and kinematic recipe for evaluating the nature of bulges using the CALIFA sample Neumann, J. Galaxies: photometry Galaxies: structure Galaxies: kinematics and dynamics Galaxies: bulges |
| title_short |
A combined photometric and kinematic recipe for evaluating the nature of bulges using the CALIFA sample |
| title_full |
A combined photometric and kinematic recipe for evaluating the nature of bulges using the CALIFA sample |
| title_fullStr |
A combined photometric and kinematic recipe for evaluating the nature of bulges using the CALIFA sample |
| title_full_unstemmed |
A combined photometric and kinematic recipe for evaluating the nature of bulges using the CALIFA sample |
| title_sort |
A combined photometric and kinematic recipe for evaluating the nature of bulges using the CALIFA sample |
| dc.creator.none.fl_str_mv |
Neumann, J. Wisotzki, L. Choudhury, O.S. Gadotti, D.A. Walcher, C.J. Bland-Hawthorn, J. García-Benito, Rubén González Delgado, Rosa M. Husemann, B. Marino, R.A. Márquez, Isabel Sánchez, S.F. Ziegler, B. |
| author |
Neumann, J. |
| author_facet |
Neumann, J. Wisotzki, L. Choudhury, O.S. Gadotti, D.A. Walcher, C.J. Bland-Hawthorn, J. García-Benito, Rubén González Delgado, Rosa M. Husemann, B. Marino, R.A. Márquez, Isabel Sánchez, S.F. Ziegler, B. |
| author_role |
author |
| author2 |
Wisotzki, L. Choudhury, O.S. Gadotti, D.A. Walcher, C.J. Bland-Hawthorn, J. García-Benito, Rubén González Delgado, Rosa M. Husemann, B. Marino, R.A. Márquez, Isabel Sánchez, S.F. Ziegler, B. |
| author2_role |
author author author author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
Swiss National Science Foundation Ministerio de Ciencia e Innovación (España) Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72] |
| dc.subject.none.fl_str_mv |
Galaxies: photometry Galaxies: structure Galaxies: kinematics and dynamics Galaxies: bulges |
| topic |
Galaxies: photometry Galaxies: structure Galaxies: kinematics and dynamics Galaxies: bulges |
| description |
Understanding the nature of bulges in disc galaxies can provide important insights into the formation and evolution of galaxies. For instance, the presence of a classical bulge suggests a relatively violent history. In contrast, the presence of an inner disc instead (also referred to as a >pseudobulge>) indicates the occurrence of secular evolution processes in the main disc. However, we still lack criteria to effectively categorise bulges, limiting our ability to study their impact on the evolution of the host galaxies. Here we present a recipe to separate inner discs from classical bulges by combining four different parameters from photometric and kinematic analyses: the bulge Sérsic index n, the concentration index C, the Kormendy (1977, ApJ, 217, 406) relation and the inner slope of the radial velocity dispersion profile σ. With that recipe we provide a detailed bulge classification for a sample of 45 galaxies from the integral-field spectroscopic survey CALIFA. To aid in categorising bulges within these galaxies, we perform 2D image decomposition to determine bulge Sérsic index, bulge-to-total light ratio, surface brightness and effective radius of the bulge and use growth curve analysis to derive a new concentration index, C. We further extract the stellar kinematics from CALIFA data cubes and analyse the radial velocity dispersion profile. The results of the different approaches are in good agreement and allow a safe classification for approximately 95% of the galaxies. In particular, we show that our new >inner> concentration index performs considerably better than the traditionally used C when yielding the nature of bulges. We also found that a combined use of this index and the Kormendy relation gives a very robust indication of the physical nature of the bulge.© ESO, 2017. |
| publishDate |
2017 |
| dc.date.none.fl_str_mv |
2017 2018 2018 2018 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 Publisher's version info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/10261/167345 |
| url |
http://hdl.handle.net/10261/167345 |
| dc.language.none.fl_str_mv |
Inglés |
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Inglés |
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#PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2014-57490-P info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2013-42227-P info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2016-76682-C3-1-P Sí |
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info:eu-repo/semantics/openAccess |
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openAccess |
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EDP Sciences |
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EDP Sciences |
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