Interactions, star formation and extended nebulae in SDSS type 2 quasars at 0.3<~ z <~ 0.6 

17 páginas, 30 figuras, 4 tablas.-- El Pdf del artículo es la versión pre-print: arXiv:1105.1665v1

Detalles Bibliográficos
Autores: Villar Martín, Montserrat, Tadhunter, Clive, Humphrey, Andrew, Fraga Encinas, R., González Delgado, Rosa M., Pérez-Torres, Miguel A., Martínez-Sansigre, Alejo
Tipo de recurso: artículo
Fecha de publicación:2011
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/46151
Acceso en línea:http://hdl.handle.net/10261/46151
Access Level:acceso abierto
Palabra clave:Galaxies: active
Quasars: emission lines
Quasars: general
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spelling Interactions, star formation and extended nebulae in SDSS type 2 quasars at 0.3<~ z <~ 0.6 Villar Martín, MontserratTadhunter, CliveHumphrey, AndrewFraga Encinas, R.González Delgado, Rosa M.Pérez-Torres, Miguel A.Martínez-Sansigre, AlejoGalaxies: activeQuasars: emission linesQuasars: general17 páginas, 30 figuras, 4 tablas.-- El Pdf del artículo es la versión pre-print: arXiv:1105.1665v1We present long-slit spectroscopy and imaging data obtained with the Focal Reducer and Low Dispersion Spectrograph (FORS2) on the Very Large Telescope of 13 optically selected type 2 quasars at z ∼ 0.3–0.6 from the original sample of Zakamska et al. (2003). The sample is likely to be affected by different selection biases. We investigate the evidence for (i) mergers/interactions (ii) star formation activity in the neighbourhood of the quasars and (iii) extended emission-line regions (EELRs) and their nature. Evidence for mergers/interactions is found in 5/13 objects. This is a lower limit for our sample, given the shallowness of most of our continuum images. Although active galactic nucleus (AGN) photoionization cannot be totally discarded, line ratios consistent with stellar photoionization are found in general in companion galaxies/knots/nuclei near these same objects. On the contrary, the gas in the neighbourhood of the quasar nucleus shows line ratios inconsistent with H ii galaxies and typical of AGN photoionized nebulae. A natural scenario to explain the observations is that star formation is ongoing in companion galaxies/knots/nuclei, possibly triggered by the interactions. These systems are, therefore, composite in their emission-line properties showing a combination of AGN and star formation features. EELRs have been found in 7/13 objects, although this fraction might be higher if a complete spatial coverage around the quasars was performed. The sizes vary between a few and up to 64 kpc. In general, the EELR apparently consists of an extended nebula associated with the quasar. In at least one case, the EELR is associated with ionized tidal features.This work has been funded with support from the Spanish Ministerio de Ciencia e Innovación through the grants AYA2004-02703, AYA2007-64712 and AYA2009-13036-C02-01 and co-financed with FEDER funds.Peer reviewedWiley-Blackwell201220122011info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/46151reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1111/j.1365-2966.2011.19031.xinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/461512026-05-22T06:33:51Z
dc.title.none.fl_str_mv Interactions, star formation and extended nebulae in SDSS type 2 quasars at 0.3<~ z <~ 0.6 
title Interactions, star formation and extended nebulae in SDSS type 2 quasars at 0.3<~ z <~ 0.6 
spellingShingle Interactions, star formation and extended nebulae in SDSS type 2 quasars at 0.3<~ z <~ 0.6 
Villar Martín, Montserrat
Galaxies: active
Quasars: emission lines
Quasars: general
title_short Interactions, star formation and extended nebulae in SDSS type 2 quasars at 0.3<~ z <~ 0.6 
title_full Interactions, star formation and extended nebulae in SDSS type 2 quasars at 0.3<~ z <~ 0.6 
title_fullStr Interactions, star formation and extended nebulae in SDSS type 2 quasars at 0.3<~ z <~ 0.6 
title_full_unstemmed Interactions, star formation and extended nebulae in SDSS type 2 quasars at 0.3<~ z <~ 0.6 
title_sort Interactions, star formation and extended nebulae in SDSS type 2 quasars at 0.3<~ z <~ 0.6 
dc.creator.none.fl_str_mv Villar Martín, Montserrat
Tadhunter, Clive
Humphrey, Andrew
Fraga Encinas, R.
González Delgado, Rosa M.
Pérez-Torres, Miguel A.
Martínez-Sansigre, Alejo
author Villar Martín, Montserrat
author_facet Villar Martín, Montserrat
Tadhunter, Clive
Humphrey, Andrew
Fraga Encinas, R.
González Delgado, Rosa M.
Pérez-Torres, Miguel A.
Martínez-Sansigre, Alejo
author_role author
author2 Tadhunter, Clive
Humphrey, Andrew
Fraga Encinas, R.
González Delgado, Rosa M.
Pérez-Torres, Miguel A.
Martínez-Sansigre, Alejo
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Galaxies: active
Quasars: emission lines
Quasars: general
topic Galaxies: active
Quasars: emission lines
Quasars: general
description 17 páginas, 30 figuras, 4 tablas.-- El Pdf del artículo es la versión pre-print: arXiv:1105.1665v1
publishDate 2011
dc.date.none.fl_str_mv 2011
2012
2012
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/46151
url http://hdl.handle.net/10261/46151
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1111/j.1365-2966.2011.19031.x
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Wiley-Blackwell
publisher.none.fl_str_mv Wiley-Blackwell
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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