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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/82511
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oai:ri.conicet.gov.ar:11336/82511 |
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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 Técnicas2025-09-03T10:08:07Zoai: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:34982025-09-03 10:08:07.341CONICET 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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1842270032165339136 |
score |
13.13397 |