Origin of the metallicity distribution in the thick disc

Astronomy & Astrophysics 587 (2016): A10 reproduced with permission from Astronomy & Astrophysics

Detalles Bibliográficos
Autores: Miranda, M. S., Pilkington, K, Gibson, B.K., Brook, C.B., Sánchez-Blázquez, Patricia, Minchev, P., Few, C.G., Smith, R., Domínguez Tenreiro, Rosa María, Obreja, Aura Catalina, Bailin, J., Stinson, G.S.
Tipo de recurso: artículo
Fecha de publicación:2015
País:España
Institución:Universidad Autónoma de Madrid
Repositorio:Biblos-e Archivo. Repositorio Institucional de la UAM
Idioma:inglés
OAI Identifier:oai:repositorio.uam.es:10486/676994
Acceso en línea:http://hdl.handle.net/10486/676994
https://dx.doi.org/10.1051/0004-6361/201525789
Access Level:acceso abierto
Palabra clave:Galaxies:abundances
Galaxies: evolution
Galaxies: disc
Methods: numerical
Galaxies: formation
Física
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network_name_str España
repository_id_str
dc.title.none.fl_str_mv Origin of the metallicity distribution in the thick disc
title Origin of the metallicity distribution in the thick disc
spellingShingle Origin of the metallicity distribution in the thick disc
Miranda, M. S.
Galaxies:abundances
Galaxies: evolution
Galaxies: disc
Methods: numerical
Galaxies: formation
Física
title_short Origin of the metallicity distribution in the thick disc
title_full Origin of the metallicity distribution in the thick disc
title_fullStr Origin of the metallicity distribution in the thick disc
title_full_unstemmed Origin of the metallicity distribution in the thick disc
title_sort Origin of the metallicity distribution in the thick disc
dc.creator.none.fl_str_mv Miranda, M. S.
Pilkington, K
Gibson, B.K.
Brook, C.B.
Sánchez-Blázquez, Patricia
Minchev, P.
Few, C.G.
Smith, R.
Domínguez Tenreiro, Rosa María
Obreja, Aura Catalina
Bailin, J.
Stinson, G.S.
author Miranda, M. S.
author_facet Miranda, M. S.
Pilkington, K
Gibson, B.K.
Brook, C.B.
Sánchez-Blázquez, Patricia
Minchev, P.
Few, C.G.
Smith, R.
Domínguez Tenreiro, Rosa María
Obreja, Aura Catalina
Bailin, J.
Stinson, G.S.
author_role author
author2 Pilkington, K
Gibson, B.K.
Brook, C.B.
Sánchez-Blázquez, Patricia
Minchev, P.
Few, C.G.
Smith, R.
Domínguez Tenreiro, Rosa María
Obreja, Aura Catalina
Bailin, J.
Stinson, G.S.
author2_role author
author
author
author
author
author
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:abundances
Galaxies: evolution
Galaxies: disc
Methods: numerical
Galaxies: formation
Física
topic Galaxies:abundances
Galaxies: evolution
Galaxies: disc
Methods: numerical
Galaxies: formation
Física
description Astronomy & Astrophysics 587 (2016): A10 reproduced with permission from Astronomy & Astrophysics
publishDate 2015
dc.date.none.fl_str_mv 2015
2015-12-13
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/10486/676994
https://dx.doi.org/10.1051/0004-6361/201525789
url http://hdl.handle.net/10486/676994
https://dx.doi.org/10.1051/0004-6361/201525789
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv European Commission http://dx.doi.org/10.13039/501100000780 Framework Programme Seven 257720
European Commission http://dx.doi.org/10.13039/501100000780 Framework Programme Seven 222919
European Commission http://dx.doi.org/10.13039/501100000780 Framework Programme Seven 283493
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 EDP Sciences
publisher.none.fl_str_mv EDP Sciences
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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spelling Origin of the metallicity distribution in the thick discMiranda, M. S.Pilkington, KGibson, B.K.Brook, C.B.Sánchez-Blázquez, PatriciaMinchev, P.Few, C.G.Smith, R.Domínguez Tenreiro, Rosa MaríaObreja, Aura CatalinaBailin, J.Stinson, G.S.Galaxies:abundancesGalaxies: evolutionGalaxies: discMethods: numericalGalaxies: formationFísicaAstronomy & Astrophysics 587 (2016): A10 reproduced with permission from Astronomy & AstrophysicsAims. Using a suite of cosmological chemodynamical disc galaxy simulations, we assess how (a) radial metallicity gradients evolve with scaleheight; (b) the vertical metallicity gradients change through the thick disc; and (c) the vertical gradient of the stellar rotation velocity varies through the disc. We compare with the Milky Way to search for analogous trends. Methods. We analyse five simulated spiral galaxies with masses comparable to the Milky Way. The simulations span a range of star formation and energy feedback strengths and prescriptions, particle-and grid-based hydrodynamical implementations, as well as initial conditions/assembly history. Disc stars are identified initially via kinematic decomposition, with a posteriori spatial cuts providing the final sample from which radial and vertical gradients are inferred. Results. Consistently, we find that the steeper, negative, radial metallicity gradients seen in the mid-plane flatten with increasing height away from the plane. In simulations with stronger (and/or more spatially-extended) feedback, the negative radial gradients invert, becoming positive for heights in excess of ∼1 kpc. Such behaviour is consistent with that inferred from recent observations. Our measurements of the vertical metallicity gradients show no clear correlation with galactocentric radius, and are in good agreement with those observed in the Milky Way's thick disc (locally). Each of the simulations presents a decline in rotational velocity with increasing height from the mid-plane, although the majority have shallower kinematic gradients than that of the Milky Way. Conclusions. Simulations employing stronger/more extended feedback prescriptions possess radial and vertical metallicity and kinematic gradients more in line with recent observations. The inverted, positive, radial metallicity gradients seen in the simulated thick stellar discs originate in a population of younger, more metal-rich, stars formed in situ, superimposed upon a background population of older migrators from the inner disc; the contrast provided by the former increases radially, due to the inside-out growth of the disc. A similar behaviour may be responsible for the same flattening as seen in the radial gradients with scaleheight in the Milky WayAcknowledges the support of the UK’s Science & Technology Facilities Council (ST/J001341/1). K.P. The generous allocation of resources from STFC’s DiRAC Facility (COSMOS: Galactic Archaeology), the DEISA consortium, co-funded through EU FP6 project RI-031513 and the FP7 project RI-222919 (through the DEISA Extreme Computing Initiative), the PRACE-2IP Project (FP7 RI- 283493), and CINES under the allocation 2010-c2011046642 made by GENCI (Grand Equipment National de Calcul Intensif). R.S. was supported by the Brain Korea 21 Plus Program (21A20131500002) and a Doyak Grant (2014003730). R.S. also acknowledges support from the EC through an ERC grant (StG- 257720) and Fondecyt (3120135). J.B. acknowledges support for program HSTAR-12837 was provided by NASA through a grant from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555EDP SciencesDepartamento de Física TeóricaFacultad de Ciencias20152015-12-13research articlehttp://purl.org/coar/resource_type/c_2df8fbb1VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10486/676994https://dx.doi.org/10.1051/0004-6361/201525789reponame:Biblos-e Archivo. Repositorio Institucional de la UAMinstname:Universidad Autónoma de MadridInglésengEuropean Commission http://dx.doi.org/10.13039/501100000780 Framework Programme Seven 257720European Commission http://dx.doi.org/10.13039/501100000780 Framework Programme Seven 222919European Commission http://dx.doi.org/10.13039/501100000780 Framework Programme Seven 283493open accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.uam.es:10486/6769942026-06-23T12:46:27Z
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