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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/142883
Ver los metadatos del registro completo
id |
CONICETDig_cd1477a0f5524ebd0d3a5a6a3cfd22ac |
---|---|
oai_identifier_str |
oai:ri.conicet.gov.ar:11336/142883 |
network_acronym_str |
CONICETDig |
repository_id_str |
3498 |
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 |
_version_ |
1844614243929817088 |
score |
13.070432 |