CLARA's view on the escape fraction of Lyman α photons in high-redshift galaxies

This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2011 RAS © 2011 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved

Detalhes bibliográficos
Autores: Forero-Romero, Jaime E., Yepes Alonso, Gustavo, Gottlöber, Stefan, Knollmann, Steffen R., Cuesta, Antonio J., Prada, Francisco
Formato: artículo
Fecha de publicación:2011
País:España
Recursos:Universidad Autónoma de Madrid
Repositorio:Biblos-e Archivo. Repositorio Institucional de la UAM
Idioma:inglés
OAI Identifier:oai:repositorio.uam.es:10486/666639
Acesso em linha:http://hdl.handle.net/10486/666639
https://dx.doi.org/10.1111/j.1365-2966.2011.18983.x
Access Level:acceso abierto
Palavra-chave:Galaxies: evolution
Galaxies: formation
Galaxies: high-redshift
Astronomía
Física
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spelling CLARA's view on the escape fraction of Lyman α photons in high-redshift galaxiesForero-Romero, Jaime E.Yepes Alonso, GustavoGottlöber, StefanKnollmann, Steffen R.Cuesta, Antonio J.Prada, FranciscoGalaxies: evolutionGalaxies: formationGalaxies: high-redshiftAstronomíaFísicaThis article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2011 RAS © 2011 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reservedUsing CLARA (code for Lyman alpha radiation analysis) we constrain the escape fraction of Lyman α radiation in galaxies in the redshift range 5 ≲z≲ 7, based on the MareNostrum High-z Universe, a smoothed particle hydrodynamics cosmological simulation with more than two billion particles. We approximate Lyman α emitters (LAEs) as dusty gaseous slabs with Lyman α radiation sources homogeneously mixed in the gas. Escape fractions for such a configuration and for different gas and dust contents are calculated using our newly developed radiative transfer code clara. The results are applied to the MareNostrum High-z Universe numerical galaxies. The model shows a weak redshift evolution and good agreement with estimations of the escape fraction as a function of reddening from observations at z~ 2.2 and z~ 3. We extend the slab model by including additional dust in a clumpy component in order to reproduce the ultraviolet (UV) continuum luminosity function (LF) and UV colours at redshifts z > rsim 5. The LAE LF, based on the extended clumpy model, reproduces broadly the bright end of the LF derived from observations at z~ 5 and z~ 6. At z~ 7, our model overpredicts the LF by roughly a factor of 4, presumably because the effects of the neutral intergalactic medium are not taken into account. The remaining tension between the observed and simulated faint end of the LF, both in the UV continuum and Lyman α at redshifts z~ 5 and z~ 6, points towards an overabundance of simulated LAEs hosted in haloes of masses 1.0 × 1010≤Mh≤ 4.0 × 1010h-1M⊙. Given the difficulties in explaining the observed overabundance by dust absorption, a probable origin of the mismatch is the high star formation rate in the simulated haloes around the quoted mass range. A more efficient supernova feedback should be able to regulate the star formation process in the shallow potential wells of these haloesJEF-R and FP acknowledge the support by the European Science Foundation AstroSim network though a grant to JEF-R . GY acknowledges support of MICINN (Spain) through research grants FPA2009-08958 and AYA2009-13875-C03-02. SRK would like to thank Consolider-Ingenio SyeC (Spain) (CSD2007-0050) for financial support. AJC acknowledges support from MICINN through FPU grant 2005-1826. We equally acknowledge funding from the Consolider project MULTIDARK (CSD2009-00064) and the Comunidad de Madrid project ASTROMADRID (S2009/ESP-146)Oxford University PressRoyal Astronomical SocietyDepartamento de Física TeóricaFacultad de Ciencias20112011-08-01research articlehttp://purl.org/coar/resource_type/c_2df8fbb1VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10486/666639https://dx.doi.org/10.1111/j.1365-2966.2011.18983.xreponame:Biblos-e Archivo. Repositorio Institucional de la UAMinstname:Universidad Autónoma de MadridInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.uam.es:10486/6666392026-06-23T12:46:27Z
dc.title.none.fl_str_mv CLARA's view on the escape fraction of Lyman α photons in high-redshift galaxies
title CLARA's view on the escape fraction of Lyman α photons in high-redshift galaxies
spellingShingle CLARA's view on the escape fraction of Lyman α photons in high-redshift galaxies
Forero-Romero, Jaime E.
Galaxies: evolution
Galaxies: formation
Galaxies: high-redshift
Astronomía
Física
title_short CLARA's view on the escape fraction of Lyman α photons in high-redshift galaxies
title_full CLARA's view on the escape fraction of Lyman α photons in high-redshift galaxies
title_fullStr CLARA's view on the escape fraction of Lyman α photons in high-redshift galaxies
title_full_unstemmed CLARA's view on the escape fraction of Lyman α photons in high-redshift galaxies
title_sort CLARA's view on the escape fraction of Lyman α photons in high-redshift galaxies
dc.creator.none.fl_str_mv Forero-Romero, Jaime E.
Yepes Alonso, Gustavo
Gottlöber, Stefan
Knollmann, Steffen R.
Cuesta, Antonio J.
Prada, Francisco
author Forero-Romero, Jaime E.
author_facet Forero-Romero, Jaime E.
Yepes Alonso, Gustavo
Gottlöber, Stefan
Knollmann, Steffen R.
Cuesta, Antonio J.
Prada, Francisco
author_role author
author2 Yepes Alonso, Gustavo
Gottlöber, Stefan
Knollmann, Steffen R.
Cuesta, Antonio J.
Prada, Francisco
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Departamento de Física Teórica
Facultad de Ciencias
dc.subject.none.fl_str_mv Galaxies: evolution
Galaxies: formation
Galaxies: high-redshift
Astronomía
Física
topic Galaxies: evolution
Galaxies: formation
Galaxies: high-redshift
Astronomía
Física
description This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2011 RAS © 2011 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved
publishDate 2011
dc.date.none.fl_str_mv 2011
2011-08-01
dc.type.none.fl_str_mv research article
http://purl.org/coar/resource_type/c_2df8fbb1
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10486/666639
https://dx.doi.org/10.1111/j.1365-2966.2011.18983.x
url http://hdl.handle.net/10486/666639
https://dx.doi.org/10.1111/j.1365-2966.2011.18983.x
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Oxford University Press
Royal Astronomical Society
publisher.none.fl_str_mv Oxford University Press
Royal Astronomical Society
dc.source.none.fl_str_mv reponame:Biblos-e Archivo. Repositorio Institucional de la UAM
instname:Universidad Autónoma de Madrid
instname_str Universidad Autónoma de Madrid
reponame_str Biblos-e Archivo. Repositorio Institucional de la UAM
collection Biblos-e Archivo. Repositorio Institucional de la UAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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