The faint host galaxies of CIV absorbers at z > 5

Autores
Finlator, Kristian; Doughty, Caitlin; Cai, Zheng; Diaz, Carlos Gonzalo
Año de publicación
2020
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We explore the expected galaxy environments of CIV absorbers at z > 5 using the Technicolor Dawn simulations. These simulations reproduce the observed history of reionization, the z ~ 6 galaxy stellar mass function, the Ly a forest transmission at z > 5, and the Si IV column density distribution (CDD) at z ~ 5.5. None the less, the CIV CDD remains underproduced. Comparison with observed CII/Si II equivalent width ratios and the CII line incidence suggests that a low carbon yield accounts for some, but not all, of the CIV discrepancy. Alternatively, a density-bounded escape scenario could harden the metagalactic ionizing background more dramatically even than binary stellar evolution, boosting the CIV CDD into near agreement with observations. In this case, galaxies ionize more efficiently and fewer are required to host a given high-ionization absorber. Absorbers´ environments therefore constrain ionizing escape. Regardless of the escape scenario, galaxies correlate with CIV absorbers out to 300 proper kpc (pkpc). The correlation strengthens independently with galaxy luminosity and CIV column density. Around strong systems (log(NCIV/cm-2) > 14)), the overdensity of galaxies with MUV < -18 or log (LLy a/erg s-1) > 41.9 declines from 200-300 within 100 pkpc to 40-60 within 250 pkpc. The previously suggested association between strong CIV absorbers and Ly a emitters at z > 5 is not expected. It may arise if both populations inhabit large-scale voids, but for different reasons. Although most neighbouring galaxies are too faint for HST, JWST will, with a single pointing, identify ~10 neighbouring galaxies per strong CIV absorber at z > 5. Ground-based tests of these predictions are possible via deep surveys for Ly a emission using integral field units.
Fil: Finlator, Kristian. Technical University of Denmark; Dinamarca
Fil: Doughty, Caitlin. New Mexico State University; Estados Unidos
Fil: Cai, Zheng. Tsinghua University; China
Fil: Diaz, Carlos Gonzalo. Gemini Observatorysouthern Operations Center; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentina
Materia
GALAXIES: EVOLUTION
GALAXIES: FORMATION
GALAXIES: HIGH-REDSHIFT
INTERGALACTIC MEDIUM
QUASARS: ABSORPTION LINES
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:11336/142883

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network_name_str CONICET Digital (CONICET)
spelling The faint host galaxies of CIV absorbers at z > 5Finlator, KristianDoughty, CaitlinCai, ZhengDiaz, Carlos GonzaloGALAXIES: EVOLUTIONGALAXIES: FORMATIONGALAXIES: HIGH-REDSHIFTINTERGALACTIC MEDIUMQUASARS: ABSORPTION LINEShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We explore the expected galaxy environments of CIV absorbers at z > 5 using the Technicolor Dawn simulations. These simulations reproduce the observed history of reionization, the z ~ 6 galaxy stellar mass function, the Ly a forest transmission at z > 5, and the Si IV column density distribution (CDD) at z ~ 5.5. None the less, the CIV CDD remains underproduced. Comparison with observed CII/Si II equivalent width ratios and the CII line incidence suggests that a low carbon yield accounts for some, but not all, of the CIV discrepancy. Alternatively, a density-bounded escape scenario could harden the metagalactic ionizing background more dramatically even than binary stellar evolution, boosting the CIV CDD into near agreement with observations. In this case, galaxies ionize more efficiently and fewer are required to host a given high-ionization absorber. Absorbers´ environments therefore constrain ionizing escape. Regardless of the escape scenario, galaxies correlate with CIV absorbers out to 300 proper kpc (pkpc). The correlation strengthens independently with galaxy luminosity and CIV column density. Around strong systems (log(NCIV/cm-2) > 14)), the overdensity of galaxies with MUV < -18 or log (LLy a/erg s-1) > 41.9 declines from 200-300 within 100 pkpc to 40-60 within 250 pkpc. The previously suggested association between strong CIV absorbers and Ly a emitters at z > 5 is not expected. It may arise if both populations inhabit large-scale voids, but for different reasons. Although most neighbouring galaxies are too faint for HST, JWST will, with a single pointing, identify ~10 neighbouring galaxies per strong CIV absorber at z > 5. Ground-based tests of these predictions are possible via deep surveys for Ly a emission using integral field units.Fil: Finlator, Kristian. Technical University of Denmark; DinamarcaFil: Doughty, Caitlin. New Mexico State University; Estados UnidosFil: Cai, Zheng. Tsinghua University; ChinaFil: Diaz, Carlos Gonzalo. Gemini Observatorysouthern Operations Center; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; ArgentinaWiley Blackwell Publishing, Inc2020-02-18info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/142883Finlator, Kristian; Doughty, Caitlin; Cai, Zheng; Diaz, Carlos Gonzalo; The faint host galaxies of CIV absorbers at z > 5; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 493; 3; 18-2-2020; 3223-32370035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/staa377info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/493/3/3223/5739927info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:24:42Zoai:ri.conicet.gov.ar:11336/142883instacron: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 10:24:43.015CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The faint host galaxies of CIV absorbers at z > 5
title The faint host galaxies of CIV absorbers at z > 5
spellingShingle The faint host galaxies of CIV absorbers at z > 5
Finlator, Kristian
GALAXIES: EVOLUTION
GALAXIES: FORMATION
GALAXIES: HIGH-REDSHIFT
INTERGALACTIC MEDIUM
QUASARS: ABSORPTION LINES
title_short The faint host galaxies of CIV absorbers at z > 5
title_full The faint host galaxies of CIV absorbers at z > 5
title_fullStr The faint host galaxies of CIV absorbers at z > 5
title_full_unstemmed The faint host galaxies of CIV absorbers at z > 5
title_sort The faint host galaxies of CIV absorbers at z > 5
dc.creator.none.fl_str_mv Finlator, Kristian
Doughty, Caitlin
Cai, Zheng
Diaz, Carlos Gonzalo
author Finlator, Kristian
author_facet Finlator, Kristian
Doughty, Caitlin
Cai, Zheng
Diaz, Carlos Gonzalo
author_role author
author2 Doughty, Caitlin
Cai, Zheng
Diaz, Carlos Gonzalo
author2_role author
author
author
dc.subject.none.fl_str_mv GALAXIES: EVOLUTION
GALAXIES: FORMATION
GALAXIES: HIGH-REDSHIFT
INTERGALACTIC MEDIUM
QUASARS: ABSORPTION LINES
topic GALAXIES: EVOLUTION
GALAXIES: FORMATION
GALAXIES: HIGH-REDSHIFT
INTERGALACTIC MEDIUM
QUASARS: ABSORPTION LINES
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 explore the expected galaxy environments of CIV absorbers at z > 5 using the Technicolor Dawn simulations. These simulations reproduce the observed history of reionization, the z ~ 6 galaxy stellar mass function, the Ly a forest transmission at z > 5, and the Si IV column density distribution (CDD) at z ~ 5.5. None the less, the CIV CDD remains underproduced. Comparison with observed CII/Si II equivalent width ratios and the CII line incidence suggests that a low carbon yield accounts for some, but not all, of the CIV discrepancy. Alternatively, a density-bounded escape scenario could harden the metagalactic ionizing background more dramatically even than binary stellar evolution, boosting the CIV CDD into near agreement with observations. In this case, galaxies ionize more efficiently and fewer are required to host a given high-ionization absorber. Absorbers´ environments therefore constrain ionizing escape. Regardless of the escape scenario, galaxies correlate with CIV absorbers out to 300 proper kpc (pkpc). The correlation strengthens independently with galaxy luminosity and CIV column density. Around strong systems (log(NCIV/cm-2) > 14)), the overdensity of galaxies with MUV < -18 or log (LLy a/erg s-1) > 41.9 declines from 200-300 within 100 pkpc to 40-60 within 250 pkpc. The previously suggested association between strong CIV absorbers and Ly a emitters at z > 5 is not expected. It may arise if both populations inhabit large-scale voids, but for different reasons. Although most neighbouring galaxies are too faint for HST, JWST will, with a single pointing, identify ~10 neighbouring galaxies per strong CIV absorber at z > 5. Ground-based tests of these predictions are possible via deep surveys for Ly a emission using integral field units.
Fil: Finlator, Kristian. Technical University of Denmark; Dinamarca
Fil: Doughty, Caitlin. New Mexico State University; Estados Unidos
Fil: Cai, Zheng. Tsinghua University; China
Fil: Diaz, Carlos Gonzalo. Gemini Observatorysouthern Operations Center; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentina
description We explore the expected galaxy environments of CIV absorbers at z > 5 using the Technicolor Dawn simulations. These simulations reproduce the observed history of reionization, the z ~ 6 galaxy stellar mass function, the Ly a forest transmission at z > 5, and the Si IV column density distribution (CDD) at z ~ 5.5. None the less, the CIV CDD remains underproduced. Comparison with observed CII/Si II equivalent width ratios and the CII line incidence suggests that a low carbon yield accounts for some, but not all, of the CIV discrepancy. Alternatively, a density-bounded escape scenario could harden the metagalactic ionizing background more dramatically even than binary stellar evolution, boosting the CIV CDD into near agreement with observations. In this case, galaxies ionize more efficiently and fewer are required to host a given high-ionization absorber. Absorbers´ environments therefore constrain ionizing escape. Regardless of the escape scenario, galaxies correlate with CIV absorbers out to 300 proper kpc (pkpc). The correlation strengthens independently with galaxy luminosity and CIV column density. Around strong systems (log(NCIV/cm-2) > 14)), the overdensity of galaxies with MUV < -18 or log (LLy a/erg s-1) > 41.9 declines from 200-300 within 100 pkpc to 40-60 within 250 pkpc. The previously suggested association between strong CIV absorbers and Ly a emitters at z > 5 is not expected. It may arise if both populations inhabit large-scale voids, but for different reasons. Although most neighbouring galaxies are too faint for HST, JWST will, with a single pointing, identify ~10 neighbouring galaxies per strong CIV absorber at z > 5. Ground-based tests of these predictions are possible via deep surveys for Ly a emission using integral field units.
publishDate 2020
dc.date.none.fl_str_mv 2020-02-18
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/11336/142883
Finlator, Kristian; Doughty, Caitlin; Cai, Zheng; Diaz, Carlos Gonzalo; The faint host galaxies of CIV absorbers at z > 5; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 493; 3; 18-2-2020; 3223-3237
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/142883
identifier_str_mv Finlator, Kristian; Doughty, Caitlin; Cai, Zheng; Diaz, Carlos Gonzalo; The faint host galaxies of CIV absorbers at z > 5; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 493; 3; 18-2-2020; 3223-3237
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/staa377
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/493/3/3223/5739927
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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