Nature and chemical abundances of a sample of Lyman-α emitter objects at high redshift

Autores
Dors, Oli L.; Agarwal, B.; Hägele, Guillermo Federico; Cardaci, Monica Viviana; Rydberg, Claes Erik; Riffel, R. A.; Oliveira, A. S.; Krabbe, A. C.
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We built a grid of photoionization models and compiled already available observational emission line intensities (1000 < λ(Å) < 2000) of confirmed star formation regions and Active Galactic Nucleus (AGNs) in order to classify five Lyα emitter (LAE) objects at high redshift (5.7 < z < 7.2). We selected objects for which at least one metal emissionline was measured. The resulting sample is composed by the objects RXCJ2248.7-4431-ID3, HSC J233408+004403, COSY, A1703-zd6, and CR7 (clump C). The photoionization models were built assuming a Power Law (associated with the presence of an AGN), a Direct Collapse Black Hole (DCBH), and Population II stars for the ionizing source. The resultingmodels were then compared with observational emission-line ratios in six diagnostic diagrams to produce a spectral classification of the sample.We found that CR7 (clump C),HSC J233408+004403 and COSY probably have a non thermal ionizing source (AGN or DCBH) while the RXC J2248.7- 4431-ID3 and A1703-zd6 seem to host a stellar cluster. Detailed photoionization models were constructed to reproduce observational emission line ratios of the sample of LAEs, and to derive chemical abundances and number of ionizing photons Q(H) of these objects. From these models, we found metallicities in the range 0.1 ≲ (Z/Z⊙) ≲ 0.5 and logQ(H) > 53. Values for C/O abundance ratio derived for the LAEs seem to be consistent with those derived for local star forming objects with similar metallicities, while an overabundance of N/O was found for most of the LAEs.
Fil: Dors, Oli L.. Universidade Do Vale Do Paraiba; Brasil
Fil: Agarwal, B.. Universitat Heidelberg; Alemania
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
Fil: Cardaci, Monica Viviana. 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
Fil: Rydberg, Claes Erik. Universitat Heidelberg; Alemania
Fil: Riffel, R. A.. Universidade Federal de Santa Maria; Brasil
Fil: Oliveira, A. S.. Universitat Heidelberg; Alemania
Fil: Krabbe, A. C.. Universidade Federal de Santa Maria; Brasil
Materia
GALAXIES: ABUNDANCES
GALAXIES: ACTIVE
GALAXIES: EVOLUTION
GALAXIES: FORMATION
GALAXIES: ISM
GALAXIES: NUCLEI
GALAXIES: SEYFERT
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/82511
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/82511
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Nature and chemical abundances of a sample of Lyman-α emitter objects at high redshiftDors, Oli L.Agarwal, B.Hägele, Guillermo FedericoCardaci, Monica VivianaRydberg, Claes ErikRiffel, R. A.Oliveira, A. S.Krabbe, A. C.GALAXIES: ABUNDANCESGALAXIES: ACTIVEGALAXIES: EVOLUTIONGALAXIES: FORMATIONGALAXIES: ISMGALAXIES: NUCLEIGALAXIES: SEYFERThttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We built a grid of photoionization models and compiled already available observational emission line intensities (1000 < λ(Å) < 2000) of confirmed star formation regions and Active Galactic Nucleus (AGNs) in order to classify five Lyα emitter (LAE) objects at high redshift (5.7 < z < 7.2). We selected objects for which at least one metal emissionline was measured. The resulting sample is composed by the objects RXCJ2248.7-4431-ID3, HSC J233408+004403, COSY, A1703-zd6, and CR7 (clump C). The photoionization models were built assuming a Power Law (associated with the presence of an AGN), a Direct Collapse Black Hole (DCBH), and Population II stars for the ionizing source. The resultingmodels were then compared with observational emission-line ratios in six diagnostic diagrams to produce a spectral classification of the sample.We found that CR7 (clump C),HSC J233408+004403 and COSY probably have a non thermal ionizing source (AGN or DCBH) while the RXC J2248.7- 4431-ID3 and A1703-zd6 seem to host a stellar cluster. Detailed photoionization models were constructed to reproduce observational emission line ratios of the sample of LAEs, and to derive chemical abundances and number of ionizing photons Q(H) of these objects. From these models, we found metallicities in the range 0.1 ≲ (Z/Z⊙) ≲ 0.5 and logQ(H) > 53. Values for C/O abundance ratio derived for the LAEs seem to be consistent with those derived for local star forming objects with similar metallicities, while an overabundance of N/O was found for most of the LAEs.Fil: Dors, Oli L.. Universidade Do Vale Do Paraiba; BrasilFil: Agarwal, B.. Universitat Heidelberg; AlemaniaFil: 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; ArgentinaFil: Cardaci, Monica Viviana. 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; ArgentinaFil: Rydberg, Claes Erik. Universitat Heidelberg; AlemaniaFil: Riffel, R. A.. Universidade Federal de Santa Maria; BrasilFil: Oliveira, A. S.. Universitat Heidelberg; AlemaniaFil: Krabbe, A. C.. Universidade Federal de Santa Maria; BrasilWiley Blackwell Publishing, Inc2018-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/82511Dors, Oli L.; Agarwal, B.; Hägele, Guillermo Federico; Cardaci, Monica Viviana; Rydberg, Claes Erik; et al.; Nature and chemical abundances of a sample of Lyman-α emitter objects at high redshift; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 479; 2; 9-2018; 2294-23070035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/sty1658info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/479/2/2294/5045259info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:35:49Zoai:ri.conicet.gov.ar:11336/82511instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:35:50.229CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Nature and chemical abundances of a sample of Lyman-α emitter objects at high redshift
title Nature and chemical abundances of a sample of Lyman-α emitter objects at high redshift
spellingShingle Nature and chemical abundances of a sample of Lyman-α emitter objects at high redshift
Dors, Oli L.
GALAXIES: ABUNDANCES
GALAXIES: ACTIVE
GALAXIES: EVOLUTION
GALAXIES: FORMATION
GALAXIES: ISM
GALAXIES: NUCLEI
GALAXIES: SEYFERT
title_short Nature and chemical abundances of a sample of Lyman-α emitter objects at high redshift
title_full Nature and chemical abundances of a sample of Lyman-α emitter objects at high redshift
title_fullStr Nature and chemical abundances of a sample of Lyman-α emitter objects at high redshift
title_full_unstemmed Nature and chemical abundances of a sample of Lyman-α emitter objects at high redshift
title_sort Nature and chemical abundances of a sample of Lyman-α emitter objects at high redshift
dc.creator.none.fl_str_mv Dors, Oli L.
Agarwal, B.
Hägele, Guillermo Federico
Cardaci, Monica Viviana
Rydberg, Claes Erik
Riffel, R. A.
Oliveira, A. S.
Krabbe, A. C.
author Dors, Oli L.
author_facet Dors, Oli L.
Agarwal, B.
Hägele, Guillermo Federico
Cardaci, Monica Viviana
Rydberg, Claes Erik
Riffel, R. A.
Oliveira, A. S.
Krabbe, A. C.
author_role author
author2 Agarwal, B.
Hägele, Guillermo Federico
Cardaci, Monica Viviana
Rydberg, Claes Erik
Riffel, R. A.
Oliveira, A. S.
Krabbe, A. C.
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv GALAXIES: ABUNDANCES
GALAXIES: ACTIVE
GALAXIES: EVOLUTION
GALAXIES: FORMATION
GALAXIES: ISM
GALAXIES: NUCLEI
GALAXIES: SEYFERT
topic GALAXIES: ABUNDANCES
GALAXIES: ACTIVE
GALAXIES: EVOLUTION
GALAXIES: FORMATION
GALAXIES: ISM
GALAXIES: NUCLEI
GALAXIES: SEYFERT
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We built a grid of photoionization models and compiled already available observational emission line intensities (1000 < λ(Å) < 2000) of confirmed star formation regions and Active Galactic Nucleus (AGNs) in order to classify five Lyα emitter (LAE) objects at high redshift (5.7 < z < 7.2). We selected objects for which at least one metal emissionline was measured. The resulting sample is composed by the objects RXCJ2248.7-4431-ID3, HSC J233408+004403, COSY, A1703-zd6, and CR7 (clump C). The photoionization models were built assuming a Power Law (associated with the presence of an AGN), a Direct Collapse Black Hole (DCBH), and Population II stars for the ionizing source. The resultingmodels were then compared with observational emission-line ratios in six diagnostic diagrams to produce a spectral classification of the sample.We found that CR7 (clump C),HSC J233408+004403 and COSY probably have a non thermal ionizing source (AGN or DCBH) while the RXC J2248.7- 4431-ID3 and A1703-zd6 seem to host a stellar cluster. Detailed photoionization models were constructed to reproduce observational emission line ratios of the sample of LAEs, and to derive chemical abundances and number of ionizing photons Q(H) of these objects. From these models, we found metallicities in the range 0.1 ≲ (Z/Z⊙) ≲ 0.5 and logQ(H) > 53. Values for C/O abundance ratio derived for the LAEs seem to be consistent with those derived for local star forming objects with similar metallicities, while an overabundance of N/O was found for most of the LAEs.
Fil: Dors, Oli L.. Universidade Do Vale Do Paraiba; Brasil
Fil: Agarwal, B.. Universitat Heidelberg; Alemania
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
Fil: Cardaci, Monica Viviana. 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
Fil: Rydberg, Claes Erik. Universitat Heidelberg; Alemania
Fil: Riffel, R. A.. Universidade Federal de Santa Maria; Brasil
Fil: Oliveira, A. S.. Universitat Heidelberg; Alemania
Fil: Krabbe, A. C.. Universidade Federal de Santa Maria; Brasil
description We built a grid of photoionization models and compiled already available observational emission line intensities (1000 < λ(Å) < 2000) of confirmed star formation regions and Active Galactic Nucleus (AGNs) in order to classify five Lyα emitter (LAE) objects at high redshift (5.7 < z < 7.2). We selected objects for which at least one metal emissionline was measured. The resulting sample is composed by the objects RXCJ2248.7-4431-ID3, HSC J233408+004403, COSY, A1703-zd6, and CR7 (clump C). The photoionization models were built assuming a Power Law (associated with the presence of an AGN), a Direct Collapse Black Hole (DCBH), and Population II stars for the ionizing source. The resultingmodels were then compared with observational emission-line ratios in six diagnostic diagrams to produce a spectral classification of the sample.We found that CR7 (clump C),HSC J233408+004403 and COSY probably have a non thermal ionizing source (AGN or DCBH) while the RXC J2248.7- 4431-ID3 and A1703-zd6 seem to host a stellar cluster. Detailed photoionization models were constructed to reproduce observational emission line ratios of the sample of LAEs, and to derive chemical abundances and number of ionizing photons Q(H) of these objects. From these models, we found metallicities in the range 0.1 ≲ (Z/Z⊙) ≲ 0.5 and logQ(H) > 53. Values for C/O abundance ratio derived for the LAEs seem to be consistent with those derived for local star forming objects with similar metallicities, while an overabundance of N/O was found for most of the LAEs.
publishDate 2018
dc.date.none.fl_str_mv 2018-09
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/82511
Dors, Oli L.; Agarwal, B.; Hägele, Guillermo Federico; Cardaci, Monica Viviana; Rydberg, Claes Erik; et al.; Nature and chemical abundances of a sample of Lyman-α emitter objects at high redshift; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 479; 2; 9-2018; 2294-2307
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/82511
identifier_str_mv Dors, Oli L.; Agarwal, B.; Hägele, Guillermo Federico; Cardaci, Monica Viviana; Rydberg, Claes Erik; et al.; Nature and chemical abundances of a sample of Lyman-α emitter objects at high redshift; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 479; 2; 9-2018; 2294-2307
0035-8711
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/sty1658
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/479/2/2294/5045259
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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