On the relevance of chaos for halo stars in the solar neighbourhood

Autores
Maffione, Nicolás Pablo; Gómez, F.; Cincotta, Pablo Miguel; Giordano, Claudia Marcela; Cooper, Andrew P.; O'Shea, B.
Año de publicación
2015
Idioma
español castellano
Tipo de recurso
artículo
Estado
versión aceptada
Descripción
Fil: Maffione, Nicolas P. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Maffione, Nicolás P. Instituto de Astrofísica de La Plata; Argentina.
Fil: Maffione, Nicolás P. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata; Argentina
Fil: Gómez, F. Max-Planck-Institut fur Astrophysik; Alemania
Fil: Cincotta, Pablo M. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata; Argentina
Fil: Cincotta, Pablo M. Instituto de Astrofísica de La Plata; Argentina
Fil: Cincotta, Pablo M. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Giordano, Claudia M. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata; Argentina
Fil: Giordano, Claudia M. Instituto de Astrofísica de La Plata; Argentina.
Fil: Giordano, Claudia M. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Cooper, A. University Of Durham; Reino Unido
Fil: O'Shea, B. Michigan State University; Estados Unidos
We show that diffusion due to chaotic mixing in the neighbourhood of the Sun may not be as relevant as previously suggested in erasing phase space signatures of past Galactic accretion events. For this purpose, we analyse solar neighbourhood-like volumes extracted from cosmological simulations that naturally account for chaotic orbital behaviour induced by the strongly triaxial and cuspy shape of the resulting dark matter haloes, among other factors. In the approximation of an analytical static triaxial model, our results show that a large fraction of stellar halo particles in such local volumes have chaos onset times (i.e. the timescale at which stars commonly associated with chaotic orbits will exhibit their chaotic behaviour) significantly larger than a Hubble time. Furthermore, particles that do present a chaotic behaviour within a Hubble time do not exhibit significant diffusion in phase space.
Materia
Astronomía
Chaos
Diffusion
Methods
Numerical
Galaxy
Evolution
Astronomía
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
RID-UNRN (UNRN)
Institución
Universidad Nacional de Río Negro
OAI Identificador
oai:rid.unrn.edu.ar:20.500.12049/2871
Acceder
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network_acronym_str RIDUNRN
repository_id_str 4369
network_name_str RID-UNRN (UNRN)
spelling On the relevance of chaos for halo stars in the solar neighbourhoodMaffione, Nicolás PabloGómez, F.Cincotta, Pablo MiguelGiordano, Claudia MarcelaCooper, Andrew P.O'Shea, B.AstronomíaChaosDiffusionMethodsNumericalGalaxyEvolutionAstronomíaFil: Maffione, Nicolas P. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Maffione, Nicolás P. Instituto de Astrofísica de La Plata; Argentina.Fil: Maffione, Nicolás P. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata; ArgentinaFil: Gómez, F. Max-Planck-Institut fur Astrophysik; AlemaniaFil: Cincotta, Pablo M. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata; ArgentinaFil: Cincotta, Pablo M. Instituto de Astrofísica de La Plata; ArgentinaFil: Cincotta, Pablo M. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Giordano, Claudia M. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata; ArgentinaFil: Giordano, Claudia M. Instituto de Astrofísica de La Plata; Argentina.Fil: Giordano, Claudia M. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Cooper, A. University Of Durham; Reino UnidoFil: O'Shea, B. Michigan State University; Estados UnidosWe show that diffusion due to chaotic mixing in the neighbourhood of the Sun may not be as relevant as previously suggested in erasing phase space signatures of past Galactic accretion events. For this purpose, we analyse solar neighbourhood-like volumes extracted from cosmological simulations that naturally account for chaotic orbital behaviour induced by the strongly triaxial and cuspy shape of the resulting dark matter haloes, among other factors. In the approximation of an analytical static triaxial model, our results show that a large fraction of stellar halo particles in such local volumes have chaos onset times (i.e. the timescale at which stars commonly associated with chaotic orbits will exhibit their chaotic behaviour) significantly larger than a Hubble time. Furthermore, particles that do present a chaotic behaviour within a Hubble time do not exhibit significant diffusion in phase space.2015-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfMaffione, Nicolas P., Gomez, F., Cincotta, Pablo M., Giordano, Claudia M., Cooper, A. & et al. (2015). On the relevance of chaos for halo stars in the solar neighbourhood. Oxford University Press; Monthly Notices Of The Royal Astronomical Society; 453; 3; 2830-28470035-8711https://academic.oup.com/mnras/article-lookup/doi/10.1093/mnras/stv1778 http://arxiv.org/abs/1508.00579 http://hdl.handle.net/11336/13886https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2871http://dx.doi.org/10.1093/mnras/stv1778spa453Monthly Notices of the Royal Astronomical Societyinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/4.0/reponame:RID-UNRN (UNRN)instname:Universidad Nacional de Río Negro2025-09-29T14:29:32Zoai:rid.unrn.edu.ar:20.500.12049/2871instacron:UNRNInstitucionalhttps://rid.unrn.edu.ar/jspui/Universidad públicaNo correspondehttps://rid.unrn.edu.ar/oai/snrdrid@unrn.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:43692025-09-29 14:29:32.503RID-UNRN (UNRN) - Universidad Nacional de Río Negrofalse
dc.title.none.fl_str_mv On the relevance of chaos for halo stars in the solar neighbourhood
title On the relevance of chaos for halo stars in the solar neighbourhood
spellingShingle On the relevance of chaos for halo stars in the solar neighbourhood
Maffione, Nicolás Pablo
Astronomía
Chaos
Diffusion
Methods
Numerical
Galaxy
Evolution
Astronomía
title_short On the relevance of chaos for halo stars in the solar neighbourhood
title_full On the relevance of chaos for halo stars in the solar neighbourhood
title_fullStr On the relevance of chaos for halo stars in the solar neighbourhood
title_full_unstemmed On the relevance of chaos for halo stars in the solar neighbourhood
title_sort On the relevance of chaos for halo stars in the solar neighbourhood
dc.creator.none.fl_str_mv Maffione, Nicolás Pablo
Gómez, F.
Cincotta, Pablo Miguel
Giordano, Claudia Marcela
Cooper, Andrew P.
O'Shea, B.
author Maffione, Nicolás Pablo
author_facet Maffione, Nicolás Pablo
Gómez, F.
Cincotta, Pablo Miguel
Giordano, Claudia Marcela
Cooper, Andrew P.
O'Shea, B.
author_role author
author2 Gómez, F.
Cincotta, Pablo Miguel
Giordano, Claudia Marcela
Cooper, Andrew P.
O'Shea, B.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Astronomía
Chaos
Diffusion
Methods
Numerical
Galaxy
Evolution
Astronomía
topic Astronomía
Chaos
Diffusion
Methods
Numerical
Galaxy
Evolution
Astronomía
dc.description.none.fl_txt_mv Fil: Maffione, Nicolas P. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Maffione, Nicolás P. Instituto de Astrofísica de La Plata; Argentina.
Fil: Maffione, Nicolás P. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata; Argentina
Fil: Gómez, F. Max-Planck-Institut fur Astrophysik; Alemania
Fil: Cincotta, Pablo M. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata; Argentina
Fil: Cincotta, Pablo M. Instituto de Astrofísica de La Plata; Argentina
Fil: Cincotta, Pablo M. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Giordano, Claudia M. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata; Argentina
Fil: Giordano, Claudia M. Instituto de Astrofísica de La Plata; Argentina.
Fil: Giordano, Claudia M. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Cooper, A. University Of Durham; Reino Unido
Fil: O'Shea, B. Michigan State University; Estados Unidos
We show that diffusion due to chaotic mixing in the neighbourhood of the Sun may not be as relevant as previously suggested in erasing phase space signatures of past Galactic accretion events. For this purpose, we analyse solar neighbourhood-like volumes extracted from cosmological simulations that naturally account for chaotic orbital behaviour induced by the strongly triaxial and cuspy shape of the resulting dark matter haloes, among other factors. In the approximation of an analytical static triaxial model, our results show that a large fraction of stellar halo particles in such local volumes have chaos onset times (i.e. the timescale at which stars commonly associated with chaotic orbits will exhibit their chaotic behaviour) significantly larger than a Hubble time. Furthermore, particles that do present a chaotic behaviour within a Hubble time do not exhibit significant diffusion in phase space.
description Fil: Maffione, Nicolas P. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
publishDate 2015
dc.date.none.fl_str_mv 2015-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv Maffione, Nicolas P., Gomez, F., Cincotta, Pablo M., Giordano, Claudia M., Cooper, A. & et al. (2015). On the relevance of chaos for halo stars in the solar neighbourhood. Oxford University Press; Monthly Notices Of The Royal Astronomical Society; 453; 3; 2830-2847
0035-8711
https://academic.oup.com/mnras/article-lookup/doi/10.1093/mnras/stv1778 http://arxiv.org/abs/1508.00579 http://hdl.handle.net/11336/13886
https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2871
http://dx.doi.org/10.1093/mnras/stv1778
identifier_str_mv Maffione, Nicolas P., Gomez, F., Cincotta, Pablo M., Giordano, Claudia M., Cooper, A. & et al. (2015). On the relevance of chaos for halo stars in the solar neighbourhood. Oxford University Press; Monthly Notices Of The Royal Astronomical Society; 453; 3; 2830-2847
0035-8711
url https://academic.oup.com/mnras/article-lookup/doi/10.1093/mnras/stv1778 http://arxiv.org/abs/1508.00579 http://hdl.handle.net/11336/13886
https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2871
http://dx.doi.org/10.1093/mnras/stv1778
dc.language.none.fl_str_mv spa
language spa
dc.relation.none.fl_str_mv 453
Monthly Notices of the Royal Astronomical Society
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/4.0/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/4.0/
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:RID-UNRN (UNRN)
instname:Universidad Nacional de Río Negro
reponame_str RID-UNRN (UNRN)
collection RID-UNRN (UNRN)
instname_str Universidad Nacional de Río Negro
repository.name.fl_str_mv RID-UNRN (UNRN) - Universidad Nacional de Río Negro
repository.mail.fl_str_mv rid@unrn.edu.ar
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score 12.559606

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