Resolving galaxies in time and space. I. Applying STARLIGHT to CALIFA datacubes

Aims. Fossil record methods based on spectral synthesis techniques have matured during the past decade, and their application to integrated galaxy spectra has fostered substantial advances in the understanding of galaxies and their evolution. Yet, because of the lack of spatial resolution, these stu...

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Autores: Cid Fernandes, R., Pérez, E., García-Benito, Rubén, González-Delgado, R., de Amorim, A.L., Sánchez, S. F., Husemann, B., Falcón-Barroso, Jesús, Sánchez-Blázquez, P., Walcher, C. J., Mast, Damián
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2013
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/405332
Acceso en línea:http://hdl.handle.net/10261/405332
Access Level:acceso abierto
Palabra clave:Galaxies: fundamental parameters
Galaxies: general
Galaxies: stellar content
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network_name_str España
repository_id_str
dc.title.none.fl_str_mv Resolving galaxies in time and space. I. Applying STARLIGHT to CALIFA datacubes
title Resolving galaxies in time and space. I. Applying STARLIGHT to CALIFA datacubes
spellingShingle Resolving galaxies in time and space. I. Applying STARLIGHT to CALIFA datacubes
Cid Fernandes, R.
Galaxies: fundamental parameters
Galaxies: general
Galaxies: stellar content
title_short Resolving galaxies in time and space. I. Applying STARLIGHT to CALIFA datacubes
title_full Resolving galaxies in time and space. I. Applying STARLIGHT to CALIFA datacubes
title_fullStr Resolving galaxies in time and space. I. Applying STARLIGHT to CALIFA datacubes
title_full_unstemmed Resolving galaxies in time and space. I. Applying STARLIGHT to CALIFA datacubes
title_sort Resolving galaxies in time and space. I. Applying STARLIGHT to CALIFA datacubes
dc.creator.none.fl_str_mv Cid Fernandes, R.
Pérez, E.
García-Benito, Rubén
González-Delgado, R.
de Amorim, A.L.
Sánchez, S. F.
Husemann, B.
Falcón-Barroso, Jesús
Sánchez-Blázquez, P.
Walcher, C. J.
Mast, Damián
author Cid Fernandes, R.
author_facet Cid Fernandes, R.
Pérez, E.
García-Benito, Rubén
González-Delgado, R.
de Amorim, A.L.
Sánchez, S. F.
Husemann, B.
Falcón-Barroso, Jesús
Sánchez-Blázquez, P.
Walcher, C. J.
Mast, Damián
author_role author
author2 Pérez, E.
García-Benito, Rubén
González-Delgado, R.
de Amorim, A.L.
Sánchez, S. F.
Husemann, B.
Falcón-Barroso, Jesús
Sánchez-Blázquez, P.
Walcher, C. J.
Mast, Damián
author2_role author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv German Research Foundation
Ministerio de Economía y Competitividad (España)
Ministerio de Ciencia e Innovación (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Galaxies: fundamental parameters
Galaxies: general
Galaxies: stellar content
topic Galaxies: fundamental parameters
Galaxies: general
Galaxies: stellar content
description Aims. Fossil record methods based on spectral synthesis techniques have matured during the past decade, and their application to integrated galaxy spectra has fostered substantial advances in the understanding of galaxies and their evolution. Yet, because of the lack of spatial resolution, these studies are limited to a global view, providing no information about the internal physics of galaxies. Methods. Motivated by the CALIFA survey, which is gathering integral field spectroscopy (IFS) over the full optical extent of 600 galaxies, we have developed an end-to-end pipeline that: (i) partitions the observed datacube into Voronoi zones in order to, when necessary and taking due account of correlated errors, increase the signal-to-noise ratio; (ii) extracts rest-framed spectra, including propagated errors and bad-pixel flags; (iii) feeds the spectra into the starlight spectral synthesis code; (iv) packs the results for all galaxy zones into a single FITS or HDF5 file; (v) performs a series of post-processing operations, including zone-to-pixel image reconstruction and unpacking the spectral and stellar population properties derived by starlight into multidimensional time, metallicity, and spatial coordinates. This paper provides an illustrated description of the whole pipeline and its many products. Using data for the nearby spiral NGC 2916 as a showcase, we go through each of the steps involved and present a series of ways of visualizing and analyzing this manifold. These include 2D maps of properties such as the velocity field, stellar extinction, mean ages and metallicities, mass surface densities, and star formation rates on different time scales and normalized in different ways, as well as 1D averages in the temporal and spatial dimensions, which lead to evolutionary curves and radial profiles of physical properties. Projections of the stellar light and mass growth onto radius-age diagrams are introduced as a means of visualizing galaxy evolution in time and space simultaneously, something which can also be achieved in 3D with snapshot cuts through the (x,y,t) cubes. Results. The results vividly illustrate the richness both of the combination of IFS data with spectral synthesis and of the insights on galaxy physics provided by the variety of diagnostics and semi-empirical constraints obtained. Additionally, they give a glimpse of what is to come from CALIFA and future IFS surveys. © ESO, 2013.
publishDate 2013
dc.date.none.fl_str_mv 2013
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
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info:eu-repo/semantics/publishedVersion
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dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/405332
url http://hdl.handle.net/10261/405332
dc.language.none.fl_str_mv Inglés
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dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
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spelling Resolving galaxies in time and space. I. Applying STARLIGHT to CALIFA datacubesCid Fernandes, R.Pérez, E.García-Benito, RubénGonzález-Delgado, R.de Amorim, A.L.Sánchez, S. F.Husemann, B.Falcón-Barroso, JesúsSánchez-Blázquez, P.Walcher, C. J.Mast, DamiánGalaxies: fundamental parametersGalaxies: generalGalaxies: stellar contentAims. Fossil record methods based on spectral synthesis techniques have matured during the past decade, and their application to integrated galaxy spectra has fostered substantial advances in the understanding of galaxies and their evolution. Yet, because of the lack of spatial resolution, these studies are limited to a global view, providing no information about the internal physics of galaxies. Methods. Motivated by the CALIFA survey, which is gathering integral field spectroscopy (IFS) over the full optical extent of 600 galaxies, we have developed an end-to-end pipeline that: (i) partitions the observed datacube into Voronoi zones in order to, when necessary and taking due account of correlated errors, increase the signal-to-noise ratio; (ii) extracts rest-framed spectra, including propagated errors and bad-pixel flags; (iii) feeds the spectra into the starlight spectral synthesis code; (iv) packs the results for all galaxy zones into a single FITS or HDF5 file; (v) performs a series of post-processing operations, including zone-to-pixel image reconstruction and unpacking the spectral and stellar population properties derived by starlight into multidimensional time, metallicity, and spatial coordinates. This paper provides an illustrated description of the whole pipeline and its many products. Using data for the nearby spiral NGC 2916 as a showcase, we go through each of the steps involved and present a series of ways of visualizing and analyzing this manifold. These include 2D maps of properties such as the velocity field, stellar extinction, mean ages and metallicities, mass surface densities, and star formation rates on different time scales and normalized in different ways, as well as 1D averages in the temporal and spatial dimensions, which lead to evolutionary curves and radial profiles of physical properties. Projections of the stellar light and mass growth onto radius-age diagrams are introduced as a means of visualizing galaxy evolution in time and space simultaneously, something which can also be achieved in 3D with snapshot cuts through the (x,y,t) cubes. Results. The results vividly illustrate the richness both of the combination of IFS data with spectral synthesis and of the insights on galaxy physics provided by the variety of diagnostics and semi-empirical constraints obtained. Additionally, they give a glimpse of what is to come from CALIFA and future IFS surveys. © ESO, 2013.CALIFA is the first legacy survey performed at Calar Alto. The CALIFA collaboration would like to thank the IAA-CSIC and MPIA-MPG as major partners of the observatory and CAHA itself for the unique access to telescope time and support in manpower and infrastructure. We also thank the CAHA staff for their dedication to this project. R.C.F. thanks the hospitality of the IAA and the support of CAPES and CNPq. A.L.A. acknowledges support from INCT-A, Brazil. B.H. gratefully acknowledges the support by the DFG via grant Wi 1369/29-1. Support from the Spanish Ministerio de Economia y Competitividad through projects AYA2010-15081 (PI RGD), AYA2010-22111-C03-03 and AYA2010-10904E (SFS), AYA2010-21322-C03-02 (PSB) and the Ramón y Cajal Program (S.F.S., P.S.B. and J.F.B.) is warmly acknowledged. We also thank the Viabilidad, Diseño, Acceso y Mejora funding program ICTS-2009-10 for funding the data acquisition of this project.Peer reviewedEDP SciencesGerman Research FoundationMinisterio de Economía y Competitividad (España)Ministerio de Ciencia e Innovación (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252013info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/405332reponame: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##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MICINN//AYA2010-15081info:eu-repo/grantAgreement/MICINN//AYA2010-22111-C03-03info:eu-repo/grantAgreement/MICINN//AYA2010-10904-Einfo:eu-repo/grantAgreement/MICINN//AYA2010-21322-C03-02http://dx.doi.org/10.1051/0004-6361/201220616Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4053322026-05-22T06:33:51Z
score 15.81155

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