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dc.contributor.author
Dors, Oli L.  
dc.contributor.author
Cardaci, Monica Viviana  
dc.contributor.author
Hägele, Guillermo Federico  
dc.contributor.author
Krabbe, Angela  
dc.date.available
2018-02-02T16:17:49Z  
dc.date.issued
2014-08  
dc.identifier.citation
Dors, Oli L.; Cardaci, Monica Viviana; Hägele, Guillermo Federico; Krabbe, Angela; Metallicity evolution of AGNs from UV emission-lines; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 443; 8-2014; 1291-1300  
dc.identifier.issn
0035-8711  
dc.identifier.uri
http://hdl.handle.net/11336/35481  
dc.description.abstract
We analysed the evolution of the metallicity of the gas with the redshift for a sample of AGNs in a very wide redshift range (0 < z<4) using ultraviolet emission lines from the narrow-line regions (NLRs) and photoionization models. The new index C43 = log[(C IV+C III])/He II] is suggested as a metallicity indicator for AGNs. Based on this indicator, we confirmed the no metallicity evolution of NLRs with the redshift pointed out by previous works. We found that metallicity of AGNs shows similar evolution than the one predicted by cosmic semianalytic models of galaxy formation set within the cold dark matter merging hierarchy (for z < 3). Our results predict a mean metallicity for local objects in agreement with the solar value (12+log(O/H)=8.69). This value is about the same that the maximum oxygen abundance value derived for the central parts of local spiral galaxies. Very low metallicity log (Z/Zsun) ~ −0.8 for some objects in the range 1.5<z<3 is derived.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Wiley Blackwell Publishing, Inc  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Abundances (Galaxias)  
dc.subject
Evolution of Galaxies  
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Formation of Galaxies  
dc.subject.classification
Astronomía  
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Ciencias Físicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Metallicity evolution of AGNs from UV emission-lines  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2018-01-12T16:21:00Z  
dc.journal.volume
443  
dc.journal.pagination
1291-1300  
dc.journal.pais
Reino Unido  
dc.journal.ciudad
Londres  
dc.description.fil
Fil: Dors, Oli L.. Universidade do Vale do Paraíba; Brasil  
dc.description.fil
Fil: Cardaci, Monica Viviana. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina  
dc.description.fil
Fil: Hägele, Guillermo Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica la Plata; Argentina  
dc.description.fil
Fil: Krabbe, Angela. Universidade do Vale do Paraíba; Brasil  
dc.journal.title
Monthly Notices of the Royal Astronomical Society  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1093/mnras/stu1218  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/443/2/1291/1064609