A few StePS forward in unveiling the complexity of galaxy evolution: Light-weighted stellar ages of intermediate-redshift galaxies with WEAVE
Context. The upcoming new generation of optical spectrographs on four-meter-class telescopes, with their huge multiplexing capabilities, excellent spectral resolution, and unprecedented wavelength coverage, will provide invaluable information for reconstructing the history of star formation in indiv...
| Autores: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/201332 |
| Acceso en línea: | http://hdl.handle.net/10261/201332 |
| Access Level: | acceso abierto |
| Palabra clave: | Galaxies: evolution Galaxies: formation Galaxies: fundamental parameters Galaxies: star formation Galaxies: stellar content |
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oai:digital.csic.es:10261/201332 |
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| dc.title.none.fl_str_mv |
A few StePS forward in unveiling the complexity of galaxy evolution: Light-weighted stellar ages of intermediate-redshift galaxies with WEAVE |
| title |
A few StePS forward in unveiling the complexity of galaxy evolution: Light-weighted stellar ages of intermediate-redshift galaxies with WEAVE |
| spellingShingle |
A few StePS forward in unveiling the complexity of galaxy evolution: Light-weighted stellar ages of intermediate-redshift galaxies with WEAVE Costantin, L. Galaxies: evolution Galaxies: formation Galaxies: fundamental parameters Galaxies: star formation Galaxies: stellar content |
| title_short |
A few StePS forward in unveiling the complexity of galaxy evolution: Light-weighted stellar ages of intermediate-redshift galaxies with WEAVE |
| title_full |
A few StePS forward in unveiling the complexity of galaxy evolution: Light-weighted stellar ages of intermediate-redshift galaxies with WEAVE |
| title_fullStr |
A few StePS forward in unveiling the complexity of galaxy evolution: Light-weighted stellar ages of intermediate-redshift galaxies with WEAVE |
| title_full_unstemmed |
A few StePS forward in unveiling the complexity of galaxy evolution: Light-weighted stellar ages of intermediate-redshift galaxies with WEAVE |
| title_sort |
A few StePS forward in unveiling the complexity of galaxy evolution: Light-weighted stellar ages of intermediate-redshift galaxies with WEAVE |
| dc.creator.none.fl_str_mv |
Costantin, L. Iovino, A. Zibetti, S. Longhetti, M. Gallazzi, A. Mercurio, A. Lonoce, I. Balcells, Marc Bolzonella, M. Busarello, G. Dalton, G. Ferré-Mateu, Anna García-Benito, Rubén Gargiulo, A. Haines, C. Jin, S. La Barbera, Francesco Mcgee, S. Merluzzi, P. Morelli, L. Murphy, D.N.A. Peralta de Arriba, L. Pizzella, A. Poggianti, B.M. Pozzetti, L. Sánchez-Blázquez, P. Talia, M. Tortora, C. Trager, S.C. Vazdekis, A. Vergani, D. Vulcani, B. |
| author |
Costantin, L. |
| author_facet |
Costantin, L. Iovino, A. Zibetti, S. Longhetti, M. Gallazzi, A. Mercurio, A. Lonoce, I. Balcells, Marc Bolzonella, M. Busarello, G. Dalton, G. Ferré-Mateu, Anna García-Benito, Rubén Gargiulo, A. Haines, C. Jin, S. La Barbera, Francesco Mcgee, S. Merluzzi, P. Morelli, L. Murphy, D.N.A. Peralta de Arriba, L. Pizzella, A. Poggianti, B.M. Pozzetti, L. Sánchez-Blázquez, P. Talia, M. Tortora, C. Trager, S.C. Vazdekis, A. Vergani, D. Vulcani, B. |
| author_role |
author |
| author2 |
Iovino, A. Zibetti, S. Longhetti, M. Gallazzi, A. Mercurio, A. Lonoce, I. Balcells, Marc Bolzonella, M. Busarello, G. Dalton, G. Ferré-Mateu, Anna García-Benito, Rubén Gargiulo, A. Haines, C. Jin, S. La Barbera, Francesco Mcgee, S. Merluzzi, P. Morelli, L. Murphy, D.N.A. Peralta de Arriba, L. Pizzella, A. Poggianti, B.M. Pozzetti, L. Sánchez-Blázquez, P. Talia, M. Tortora, C. Trager, S.C. Vazdekis, A. Vergani, D. Vulcani, B. |
| author2_role |
author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
Comunidad de Madrid Istituto Nazionale di Astrofisica Ministerio de Economía y Competitividad (España) European Commission Ministerio de Ciencia, Innovación y Universidades (España) La Caixa Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72] |
| dc.subject.none.fl_str_mv |
Galaxies: evolution Galaxies: formation Galaxies: fundamental parameters Galaxies: star formation Galaxies: stellar content |
| topic |
Galaxies: evolution Galaxies: formation Galaxies: fundamental parameters Galaxies: star formation Galaxies: stellar content |
| description |
Context. The upcoming new generation of optical spectrographs on four-meter-class telescopes, with their huge multiplexing capabilities, excellent spectral resolution, and unprecedented wavelength coverage, will provide invaluable information for reconstructing the history of star formation in individual galaxies up to redshifts of about 0.7. Aims. We aim at defining simple but robust and meaningful physical parameters that can be used to trace the coexistence of widely diverse stellar components: younger stellar populations superimposed on the bulk of older ones. Methods. We produced spectra of galaxies closely mimicking data from the forthcoming Stellar Populations at intermediate redshifts Survey (StePS), a survey that uses the WEAVE spectrograph on the William Herschel Telescope. First, we assessed our ability to reliably measure both ultraviolet and optical spectral indices in galaxies of different spectral types for typically expected signal-to-noise ratios. We then analyzed such mock spectra with a Bayesian approach, deriving the probability density function of r- and u-band light-weighted ages as well as of their difference. Results. We find that the ultraviolet indices significantly narrow the uncertainties in estimating the r- and u-band light-weighted ages and their difference in individual galaxies. These diagnostics, robustly retrievable for large galaxy samples even when observed at moderate signal-to-noise ratios, allow us to identify secondary episodes of star formation up to an age of ∼0.1 Gyr for stellar populations older than ∼1.5 Gyr, pushing up to an age of ∼1 Gyr for stellar populations older than ∼5 Gyr. Conclusions. The difference between r-band and u-band light-weighted ages is shown to be a powerful diagnostic to characterize and constrain extended star-formation histories and the presence of young stellar populations on top of older ones. This parameter can be used to explore the interplay between different galaxy star-formation histories and physical parameters such as galaxy mass, size, morphology, and environment.© ESO 2019. |
| publishDate |
2019 |
| dc.date.none.fl_str_mv |
2019 2020 2020 2020 |
| 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 |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/10261/201332 |
| url |
http://hdl.handle.net/10261/201332 |
| 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# info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2016-77846-P info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2017-0709 http://dx.doi.org/10.1051/0004-6361/201936550 Sí |
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info:eu-repo/semantics/openAccess |
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openAccess |
| dc.publisher.none.fl_str_mv |
EDP Sciences |
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EDP Sciences |
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reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC) |
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Consejo Superior de Investigaciones Científicas (CSIC) |
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DIGITAL.CSIC. Repositorio Institucional del CSIC |
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DIGITAL.CSIC. Repositorio Institucional del CSIC |
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|
| _version_ |
1869422039850287104 |
| spelling |
A few StePS forward in unveiling the complexity of galaxy evolution: Light-weighted stellar ages of intermediate-redshift galaxies with WEAVECostantin, L.Iovino, A.Zibetti, S.Longhetti, M.Gallazzi, A.Mercurio, A.Lonoce, I.Balcells, MarcBolzonella, M.Busarello, G.Dalton, G.Ferré-Mateu, AnnaGarcía-Benito, RubénGargiulo, A.Haines, C.Jin, S.La Barbera, FrancescoMcgee, S.Merluzzi, P.Morelli, L.Murphy, D.N.A.Peralta de Arriba, L.Pizzella, A.Poggianti, B.M.Pozzetti, L.Sánchez-Blázquez, P.Talia, M.Tortora, C.Trager, S.C.Vazdekis, A.Vergani, D.Vulcani, B.Galaxies: evolutionGalaxies: formationGalaxies: fundamental parametersGalaxies: star formationGalaxies: stellar contentContext. The upcoming new generation of optical spectrographs on four-meter-class telescopes, with their huge multiplexing capabilities, excellent spectral resolution, and unprecedented wavelength coverage, will provide invaluable information for reconstructing the history of star formation in individual galaxies up to redshifts of about 0.7. Aims. We aim at defining simple but robust and meaningful physical parameters that can be used to trace the coexistence of widely diverse stellar components: younger stellar populations superimposed on the bulk of older ones. Methods. We produced spectra of galaxies closely mimicking data from the forthcoming Stellar Populations at intermediate redshifts Survey (StePS), a survey that uses the WEAVE spectrograph on the William Herschel Telescope. First, we assessed our ability to reliably measure both ultraviolet and optical spectral indices in galaxies of different spectral types for typically expected signal-to-noise ratios. We then analyzed such mock spectra with a Bayesian approach, deriving the probability density function of r- and u-band light-weighted ages as well as of their difference. Results. We find that the ultraviolet indices significantly narrow the uncertainties in estimating the r- and u-band light-weighted ages and their difference in individual galaxies. These diagnostics, robustly retrievable for large galaxy samples even when observed at moderate signal-to-noise ratios, allow us to identify secondary episodes of star formation up to an age of ∼0.1 Gyr for stellar populations older than ∼1.5 Gyr, pushing up to an age of ∼1 Gyr for stellar populations older than ∼5 Gyr. Conclusions. The difference between r-band and u-band light-weighted ages is shown to be a powerful diagnostic to characterize and constrain extended star-formation histories and the presence of young stellar populations on top of older ones. This parameter can be used to explore the interplay between different galaxy star-formation histories and physical parameters such as galaxy mass, size, morphology, and environment.© ESO 2019.L. C. wish to acknowledge financial support from Premiale 2015 MITiC, program 1.05.06.10 and Comunidad de Madrid under Atraccion de Talento grant 2018-T2/TIC-11612. A. I., S. Z., M. L., A. G., A. M., and C. T. acknowledge the financial support from the INAF PRIN-SKA 2017 program 1.05.01.88.04.ESKAPE-HI. I. L. acknowledges financial support from INAF-WEAVE funds, program 1.05.03.04.05. R. G. B. acknowledges support from the Spanish Ministry of Economy and Competitiveness through grant 205 AYA2016-77846-P and the State Agency for Research of the Spanish MCIU through the >Center of Excellence Severo Ochoa> award to 2017 the Instituto de Astrofisica de Andalucia (SEV-2017-0709). A. F. M. has received financial support through the Postdoctoral Junior Leader Fellowship Programme from >La Caixa> Banking Foundation (LCF/BQ/LI18/11630007). B. V. acknowledges the financial support from INAF Main Stream 2018 (P. I.: B. Vulcani).EDP SciencesComunidad de MadridIstituto Nazionale di AstrofisicaMinisterio de Economía y Competitividad (España)European CommissionMinisterio de Ciencia, Innovación y Universidades (España)La CaixaConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2020202020192020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/201332reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#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/AYA2016-77846-Pinfo:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2017-0709http://dx.doi.org/10.1051/0004-6361/201936550Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2013322026-05-22T06:33:51Z |
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15,812455 |