Chemodynamics of green pea galaxies - I. Outflows and turbulence driving the escape of ionizing photons and chemical enrichment

Autores
Hogarth, L.; Amorín, R.; Vílchez, J. M.; Hägele, Guillermo Federico; Cardaci, Monica Viviana; Pérez Montero, E.; Firpo, Verónica; Jaskot, A.; Chávez, R.
Año de publicación
2020
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We investigate the ionized gas kinematics, physical properties, and chemical abundances of Sloan Digital Sky Survey J142947, a Green Pea galaxy at redshift z ∼ 0.17 with strong, double-peak Ly α emission and indirect evidence of Lyman continuum (LyC) leakage. Using high-dispersion spectroscopy, we perform a multicomponent analysis of emission-line profiles. Our model consistently fits all lines as a narrow component with intrinsic velocity dispersion σ ∼ 40 km s-1, and two broader blue-shifted components with σ ∼ 90 and ∼250 km s-1. We find electron densities and temperatures, ionization conditions, and direct O/H and N/O abundances for each component. A highly ionized, metal-poor, young and compact starburst dominates narrow emission, showing evidence of hard radiation fields and elevated N/O. The blue-shifted broader components are consistent with highly turbulent, possibly clumpy ionized gas at the base of a strong photoionized outflow, which accounts for ≳50 per cent of the integrated emission-line fluxes. The outflow is dense and metal-enriched compared to the HII regions, with expansion velocities larger than those obtained from UV interstellar absorption lines under standard assumptions. Some of these metals may be able to escape, with outflows loading factors comparable to those found in high-z galaxies of similar SFR/Area. Our findings depict a two-stage starburst picture; hard radiation fields from young star clusters illuminate a turbulent and clumpy ISM that has been eroded by SNe feedback. Whilst UV data suggest an extended Ly α halo with high average HI column density, LyC photons could only escape from SDSS J142947 through low HI density channels or filaments in the ISM approaching density-bounded conditions, traced by outflowing gas.
Fil: Hogarth, L.. Colegio Universitario de Londres; Reino Unido
Fil: Amorín, R.. Universidad de La Serena; Chile
Fil: Vílchez, J. M.. Instituto de Astrofísica de Andalucía - Csic; España
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. Instituto de Astrofísica de la Plata (conicet- Universidad Nacional de la Plata); Argentina
Fil: Pérez Montero, E.. Instituto de Astrofísica de Andalucía - Csic; España
Fil: Firpo, Verónica. Gemini Observatorysouthern Operations Center; Chile
Fil: Jaskot, A.. Williams College; Estados Unidos
Fil: Chávez, R.. Instituto de Radioastronomía y Astrofísica; México
Materia
(COSMOLOGY:) REIONIZATION
GALAXIES: ABUNDANCES
GALAXIES: DWARF
GALAXIES: EVOLUTION
GALAXIES: KINEMATICS AND DYNAMICS
GALAXIES: STARBURST
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:11336/144106
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/144106
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Chemodynamics of green pea galaxies - I. Outflows and turbulence driving the escape of ionizing photons and chemical enrichmentHogarth, L.Amorín, R.Vílchez, J. M.Hägele, Guillermo FedericoCardaci, Monica VivianaPérez Montero, E.Firpo, VerónicaJaskot, A.Chávez, R.(COSMOLOGY:) REIONIZATIONGALAXIES: ABUNDANCESGALAXIES: DWARFGALAXIES: EVOLUTIONGALAXIES: KINEMATICS AND DYNAMICSGALAXIES: STARBURSThttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We investigate the ionized gas kinematics, physical properties, and chemical abundances of Sloan Digital Sky Survey J142947, a Green Pea galaxy at redshift z ∼ 0.17 with strong, double-peak Ly α emission and indirect evidence of Lyman continuum (LyC) leakage. Using high-dispersion spectroscopy, we perform a multicomponent analysis of emission-line profiles. Our model consistently fits all lines as a narrow component with intrinsic velocity dispersion σ ∼ 40 km s-1, and two broader blue-shifted components with σ ∼ 90 and ∼250 km s-1. We find electron densities and temperatures, ionization conditions, and direct O/H and N/O abundances for each component. A highly ionized, metal-poor, young and compact starburst dominates narrow emission, showing evidence of hard radiation fields and elevated N/O. The blue-shifted broader components are consistent with highly turbulent, possibly clumpy ionized gas at the base of a strong photoionized outflow, which accounts for ≳50 per cent of the integrated emission-line fluxes. The outflow is dense and metal-enriched compared to the HII regions, with expansion velocities larger than those obtained from UV interstellar absorption lines under standard assumptions. Some of these metals may be able to escape, with outflows loading factors comparable to those found in high-z galaxies of similar SFR/Area. Our findings depict a two-stage starburst picture; hard radiation fields from young star clusters illuminate a turbulent and clumpy ISM that has been eroded by SNe feedback. Whilst UV data suggest an extended Ly α halo with high average HI column density, LyC photons could only escape from SDSS J142947 through low HI density channels or filaments in the ISM approaching density-bounded conditions, traced by outflowing gas.Fil: Hogarth, L.. Colegio Universitario de Londres; Reino UnidoFil: Amorín, R.. Universidad de La Serena; ChileFil: Vílchez, J. M.. Instituto de Astrofísica de Andalucía - Csic; EspañaFil: 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. Instituto de Astrofísica de la Plata (conicet- Universidad Nacional de la Plata); ArgentinaFil: Pérez Montero, E.. Instituto de Astrofísica de Andalucía - Csic; EspañaFil: Firpo, Verónica. Gemini Observatorysouthern Operations Center; ChileFil: Jaskot, A.. Williams College; Estados UnidosFil: Chávez, R.. Instituto de Radioastronomía y Astrofísica; MéxicoWiley Blackwell Publishing, Inc2020-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/144106Hogarth, L.; Amorín, R.; Vílchez, J. M.; Hägele, Guillermo Federico; Cardaci, Monica Viviana; et al.; Chemodynamics of green pea galaxies - I. Outflows and turbulence driving the escape of ionizing photons and chemical enrichment; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 494; 3; 5-2020; 3541-35610035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1093/MNRAS/STAA851info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article-abstract/494/3/3541/5815438?redirectedFrom=fulltextinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:52:00Zoai:ri.conicet.gov.ar:11336/144106instacron: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:34982025-10-15 14:52:00.61CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Chemodynamics of green pea galaxies - I. Outflows and turbulence driving the escape of ionizing photons and chemical enrichment
title Chemodynamics of green pea galaxies - I. Outflows and turbulence driving the escape of ionizing photons and chemical enrichment
spellingShingle Chemodynamics of green pea galaxies - I. Outflows and turbulence driving the escape of ionizing photons and chemical enrichment
Hogarth, L.
(COSMOLOGY:) REIONIZATION
GALAXIES: ABUNDANCES
GALAXIES: DWARF
GALAXIES: EVOLUTION
GALAXIES: KINEMATICS AND DYNAMICS
GALAXIES: STARBURST
title_short Chemodynamics of green pea galaxies - I. Outflows and turbulence driving the escape of ionizing photons and chemical enrichment
title_full Chemodynamics of green pea galaxies - I. Outflows and turbulence driving the escape of ionizing photons and chemical enrichment
title_fullStr Chemodynamics of green pea galaxies - I. Outflows and turbulence driving the escape of ionizing photons and chemical enrichment
title_full_unstemmed Chemodynamics of green pea galaxies - I. Outflows and turbulence driving the escape of ionizing photons and chemical enrichment
title_sort Chemodynamics of green pea galaxies - I. Outflows and turbulence driving the escape of ionizing photons and chemical enrichment
dc.creator.none.fl_str_mv Hogarth, L.
Amorín, R.
Vílchez, J. M.
Hägele, Guillermo Federico
Cardaci, Monica Viviana
Pérez Montero, E.
Firpo, Verónica
Jaskot, A.
Chávez, R.
author Hogarth, L.
author_facet Hogarth, L.
Amorín, R.
Vílchez, J. M.
Hägele, Guillermo Federico
Cardaci, Monica Viviana
Pérez Montero, E.
Firpo, Verónica
Jaskot, A.
Chávez, R.
author_role author
author2 Amorín, R.
Vílchez, J. M.
Hägele, Guillermo Federico
Cardaci, Monica Viviana
Pérez Montero, E.
Firpo, Verónica
Jaskot, A.
Chávez, R.
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv (COSMOLOGY:) REIONIZATION
GALAXIES: ABUNDANCES
GALAXIES: DWARF
GALAXIES: EVOLUTION
GALAXIES: KINEMATICS AND DYNAMICS
GALAXIES: STARBURST
topic (COSMOLOGY:) REIONIZATION
GALAXIES: ABUNDANCES
GALAXIES: DWARF
GALAXIES: EVOLUTION
GALAXIES: KINEMATICS AND DYNAMICS
GALAXIES: STARBURST
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 investigate the ionized gas kinematics, physical properties, and chemical abundances of Sloan Digital Sky Survey J142947, a Green Pea galaxy at redshift z ∼ 0.17 with strong, double-peak Ly α emission and indirect evidence of Lyman continuum (LyC) leakage. Using high-dispersion spectroscopy, we perform a multicomponent analysis of emission-line profiles. Our model consistently fits all lines as a narrow component with intrinsic velocity dispersion σ ∼ 40 km s-1, and two broader blue-shifted components with σ ∼ 90 and ∼250 km s-1. We find electron densities and temperatures, ionization conditions, and direct O/H and N/O abundances for each component. A highly ionized, metal-poor, young and compact starburst dominates narrow emission, showing evidence of hard radiation fields and elevated N/O. The blue-shifted broader components are consistent with highly turbulent, possibly clumpy ionized gas at the base of a strong photoionized outflow, which accounts for ≳50 per cent of the integrated emission-line fluxes. The outflow is dense and metal-enriched compared to the HII regions, with expansion velocities larger than those obtained from UV interstellar absorption lines under standard assumptions. Some of these metals may be able to escape, with outflows loading factors comparable to those found in high-z galaxies of similar SFR/Area. Our findings depict a two-stage starburst picture; hard radiation fields from young star clusters illuminate a turbulent and clumpy ISM that has been eroded by SNe feedback. Whilst UV data suggest an extended Ly α halo with high average HI column density, LyC photons could only escape from SDSS J142947 through low HI density channels or filaments in the ISM approaching density-bounded conditions, traced by outflowing gas.
Fil: Hogarth, L.. Colegio Universitario de Londres; Reino Unido
Fil: Amorín, R.. Universidad de La Serena; Chile
Fil: Vílchez, J. M.. Instituto de Astrofísica de Andalucía - Csic; España
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. Instituto de Astrofísica de la Plata (conicet- Universidad Nacional de la Plata); Argentina
Fil: Pérez Montero, E.. Instituto de Astrofísica de Andalucía - Csic; España
Fil: Firpo, Verónica. Gemini Observatorysouthern Operations Center; Chile
Fil: Jaskot, A.. Williams College; Estados Unidos
Fil: Chávez, R.. Instituto de Radioastronomía y Astrofísica; México
description We investigate the ionized gas kinematics, physical properties, and chemical abundances of Sloan Digital Sky Survey J142947, a Green Pea galaxy at redshift z ∼ 0.17 with strong, double-peak Ly α emission and indirect evidence of Lyman continuum (LyC) leakage. Using high-dispersion spectroscopy, we perform a multicomponent analysis of emission-line profiles. Our model consistently fits all lines as a narrow component with intrinsic velocity dispersion σ ∼ 40 km s-1, and two broader blue-shifted components with σ ∼ 90 and ∼250 km s-1. We find electron densities and temperatures, ionization conditions, and direct O/H and N/O abundances for each component. A highly ionized, metal-poor, young and compact starburst dominates narrow emission, showing evidence of hard radiation fields and elevated N/O. The blue-shifted broader components are consistent with highly turbulent, possibly clumpy ionized gas at the base of a strong photoionized outflow, which accounts for ≳50 per cent of the integrated emission-line fluxes. The outflow is dense and metal-enriched compared to the HII regions, with expansion velocities larger than those obtained from UV interstellar absorption lines under standard assumptions. Some of these metals may be able to escape, with outflows loading factors comparable to those found in high-z galaxies of similar SFR/Area. Our findings depict a two-stage starburst picture; hard radiation fields from young star clusters illuminate a turbulent and clumpy ISM that has been eroded by SNe feedback. Whilst UV data suggest an extended Ly α halo with high average HI column density, LyC photons could only escape from SDSS J142947 through low HI density channels or filaments in the ISM approaching density-bounded conditions, traced by outflowing gas.
publishDate 2020
dc.date.none.fl_str_mv 2020-05
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/11336/144106
Hogarth, L.; Amorín, R.; Vílchez, J. M.; Hägele, Guillermo Federico; Cardaci, Monica Viviana; et al.; Chemodynamics of green pea galaxies - I. Outflows and turbulence driving the escape of ionizing photons and chemical enrichment; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 494; 3; 5-2020; 3541-3561
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/144106
identifier_str_mv Hogarth, L.; Amorín, R.; Vílchez, J. M.; Hägele, Guillermo Federico; Cardaci, Monica Viviana; et al.; Chemodynamics of green pea galaxies - I. Outflows and turbulence driving the escape of ionizing photons and chemical enrichment; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 494; 3; 5-2020; 3541-3561
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/STAA851
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article-abstract/494/3/3541/5815438?redirectedFrom=fulltext
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
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 13.22299

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