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dc.contributor.author
Miralles-Caballero, D.  
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Díaz, A. I.  
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López-Sánchez, Á. R.  
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Rosales-Ortega, F. F.  
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Monreal-Ibero, A.  
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Pérez-Montero, E.  
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Kehrig, C.  
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García-Benito, R.  
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Sánchez, S. F.  
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Walcher, C. J.  
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Galbany, L.  
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Iglesias-Páramo, J.  
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Vílchez, J. M.  
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González Delgado, R. M.  
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van de Ven, G.  
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Barrera-Ballesteros, J.  
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Lyubenova, M.  
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Meidt, S.  
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Falcon-Barroso, J.  
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Mast, Damian  
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Mendoza, M. A.  
dc.date.available
2019-04-11T16:54:29Z  
dc.date.issued
2016-08  
dc.identifier.citation
Miralles-Caballero, D.; Díaz, A. I.; López-Sánchez, Á. R.; Rosales-Ortega, F. F.; Monreal-Ibero, A.; et al.; First survey of Wolf-Rayet star populations over the full extension of nearby galaxies observed with CALIFA; EDP Sciences; Astronomy and Astrophysics; 592; 8-2016  
dc.identifier.issn
0004-6361  
dc.identifier.uri
http://hdl.handle.net/11336/74075  
dc.description.abstract
The search of extragalactic regions with conspicuous presence of Wolf-Rayet (WR) stars outside the Local Group is challenging task owing to the difficulty in detecting their faint spectral features. In this exploratory work, we develop a methodology to perform an automated search of WR signatures through a pixel-by-pixel analysis of integral field spectroscopy (IFS) data belonging to the Calar Alto Legacy Integral Field Area survey, CALIFA. This procedure has been applied to a sample of nearby galaxies spanning a wide range of physical, morphological, and environmental properties. This technique allowed us to build the first catalogue of regions rich in WR stars with spatially resolved information, and enabled us to study the properties of these complexes in a two-dimensional (2D) context. The detection technique is based on the identification of the blue WR bump (around He iiλ4686 Å, mainly associated with nitrogen-rich WR stars; WN) and the red WR bump (around C ivλ5808 Å, mainly associated with carbon-rich WR stars; WC) using a pixel-by-pixel analysis that maximizes the number of independent regions within a given galaxy. We identified 44 WR-rich regions with blue bumps distributed in 25 out of a total of 558 galaxies. The red WR bump was identified only in 5 of those regions. Most of the WR regions are located within one effective radius from the galaxy centre, and around one-third are located within ~1 kpc or less from the centre. We found that the majority of the galaxies hosting WR populations in our sample are involved in some kind of interaction process. Half of the host galaxies share some properties with gamma-ray burst (GRB) hosts where WR stars, such as potential candidates to the progenitors of GRBs, are found. We also compared the WR properties derived from the CALIFA data with stellar population synthesis models, and confirm that simple star models are generally not able to reproduce the observations. We conclude that other effects, such as binary star channel (which could extend theWR phase up to 10 Myr), fast rotation, or other physical processes that cause the loss of observed Lyman continuum photons, very likely affect the derived WR properties, and hence should be considered when modelling the evolution of massive stars.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
EDP Sciences  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Galaxies: Ism  
dc.subject
Galaxies: Starburst  
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Stars: Wolf-Rayet  
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Techniques: Imaging Spectroscopy  
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Astronomía  
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Ciencias Físicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
First survey of Wolf-Rayet star populations over the full extension of nearby galaxies observed with CALIFA  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2019-03-21T14:17:50Z  
dc.identifier.eissn
1432-0746  
dc.journal.volume
592  
dc.journal.pais
Francia  
dc.journal.ciudad
Paris  
dc.description.fil
Fil: Miralles-Caballero, D.. Universidad Autónoma de Madrid; España  
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Fil: Díaz, A. I.. Universidad Autónoma de Madrid; España  
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Fil: López-Sánchez, Á. R.. Sydney Institute For Astronomy; Australia  
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Fil: Rosales-Ortega, F. F.. Instituto Nacional de Astrofísica, Óptica y Electrónica; México  
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Fil: Monreal-Ibero, A.. Université Paris Diderot - Paris 7; Francia  
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Fil: Pérez-Montero, E.. Instituto de Astrofísica de Andalucía; España  
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Fil: Kehrig, C.. Instituto de Astrofísica de Andalucía; España  
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Fil: García-Benito, R.. Instituto de Astrofísica de Andalucía; España  
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Fil: Sánchez, S. F.. Instituto de Astrofísica de Andalucía; España  
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Fil: Walcher, C. J.. Leibniz-institut Für Astrophysik Potsdam (aip); Alemania  
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Fil: Galbany, L.. Millennium Institute Of Astrophysics Mas; Chile  
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Fil: Iglesias-Páramo, J.. Instituto de Astrofísica de Andalucía; España  
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Fil: Vílchez, J. M.. Instituto de Astrofísica de Andalucía; España  
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Fil: González Delgado, R. M.. Instituto de Astrofísica de Andalucía; España  
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Fil: van de Ven, G.. Max Planck Institut Fur Astronomie; Alemania  
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Fil: Barrera-Ballesteros, J.. Instituto de Astrofísica de Canarias; España  
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Fil: Lyubenova, M.. Max Planck Institut Fur Astronomie; Alemania  
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Fil: Meidt, S.. Universidad de Porto; Portugal  
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Fil: Falcon-Barroso, J.. Instituto de Astrofísica de Canarias; España  
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Fil: Mast, Damian. Centro Astronómico Hispano Alemán; España. Instituto de Astrofísica de Andalucía; España. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina  
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Fil: Mendoza, M. A.. Instituto de Astrofísica de Andalucía; España  
dc.journal.title
Astronomy and Astrophysics  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.aanda.org/10.1051/0004-6361/201527179  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361/201527179