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dc.date.accessioned 2019-11-15T16:55:00Z
dc.date.available 2019-11-15T16:55:00Z
dc.date.issued 2014
dc.identifier.uri http://sedici.unlp.edu.ar/handle/10915/85697
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 amean metallicity for local objects in agreement with the solar value (12+log(O/H)=8.69). This value is about the same that themaximum oxygen abundance value derived for the central parts of local spiral galaxies. Very low metallicity log (Z/Z⊙) ≈ -0.8 for some objects in the range 1.5 en
dc.format.extent 1291-1300 es
dc.language en es
dc.subject galaxies: abundances es
dc.subject galaxies: evolution es
dc.subject galaxies: formation es
dc.subject galaxies: general es
dc.subject galaxies: ISM es
dc.title Metallicity evolution of AGNs from UV emission lines based on a new index en
dc.type Articulo es
sedici.identifier.other doi:10.1093/mnras/stu1218 es
sedici.identifier.other eid:2-s2.0-84905659128 es
sedici.identifier.issn 0035-8711 es
sedici.creator.person Dors Jr., Oli L. es
sedici.creator.person Cardaci, Mónica Viviana es
sedici.creator.person Hägele, Guillermo Federico es
sedici.creator.person Krabbe, Â. C. es
sedici.subject.materias Ciencias Astronómicas es
sedici.description.fulltext true es
mods.originInfo.place Facultad de Ciencias Astronómicas y Geofísicas es
sedici.subtype Articulo es
sedici.rights.license Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
sedici.rights.uri http://creativecommons.org/licenses/by-nc-sa/4.0/
sedici.description.peerReview peer-review es
sedici.relation.journalTitle Monthly Notices of the Royal Astronomical Society es
sedici.relation.journalVolumeAndIssue vol. 443, no. 2 es
sedici.rights.sherpa * Color: green * Pre-print del autor: si * Post-print del autor: si * Versión de editor/PDF:si * Condiciones: >>Pre-print si only be posted prior to acceptance >>Pre-print on author's personal website, employer website, free public server or pre-prints in subject area >>Pre-print must be accompanied by set statement (see link) >>Pre-print set statement must be amended upon publication (see policy) >>Publisher's version/PDF may be used >>Author's Post-print on Institutional repositories or Central repositories >>Publisher's version/PDF on Institutional repositories or Central repositories, with all rights reserved (see policy) >>Published source must be acknowledged >>Must link to publisher version >>Set phrase to accompany archived copy (see policy) * Link a Sherpa: http://sherpa.ac.uk/romeo/issn/0035-8711/es/


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Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) Excepto donde se diga explícitamente, este item se publica bajo la siguiente licencia Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)