Yule-Simpson's paradox in galactic archaeology

Autores
Minchev, I.; Matijevic, G.; Hogg, D.W.; Guiglion, G.; Steinmetz, M.; Anders, F.; Chiappini, C.; Martig, M.; Queiroz, A.; Scannapieco, Cecilia
Año de publicación
2019
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Simpson's paradox, or Yule-Simpson effect, arises when a trend appears in different subsets of data but disappears or reverses when these subsets are combined. We describe here seven cases of this phenomenon for chemo-kinematical relations believed to constrain the MilkyWay disc formation and evolution. We show that interpreting trends in relations, such as the radial and vertical chemical abundance gradients, the age-metallicity relation, and the metallicity- rotational velocity relation (MVR), can lead to conflicting conclusions about the Galaxy past if analyses marginalize over stellar age and/or birth radius. It is demonstrated that the MVR in RAVE giants is consistent with being always strongly negative, when narrow bins of [Mg/Fe] are considered. This is directly related to the negative radial metallicity gradients of stars grouped by common age (mono-age populations) due to the inside-out disc formation. The effect of the asymmetric drift can then give rise to a positive MVR trend in high-[a/Fe] stars, with a slope dependent on a given survey's selection function and observational uncertainties. We also study the variation of lithium abundance, A(Li), with [Fe/H] of AMBRE:HARPS dwarfs. A strong reversal in the positive A(Li)-[Fe/H] trend of the total sample is found for mono-age populations, flattening for younger groups of stars. Dissecting by birth radius shows strengthening in the positive A(Li)-[Fe/H] trend, shifting to higher [Fe/H] with decreasing birth radius; these observational results suggest new constraints on chemical evolutionmodels. This work highlights the necessity for precise age estimates for large stellar samples covering wide spatial regions.
Fil: Minchev, I.. Leibniz Institut Fuer Astrophysik Potsdam; Alemania
Fil: Matijevic, G.. Leibniz Institut Fuer Astrophysik Potsdam; Alemania
Fil: Hogg, D.W.. No especifíca;
Fil: Guiglion, G.. Leibniz Institut Fuer Astrophysik Potsdam; Alemania
Fil: Steinmetz, M.. Leibniz Institut Fuer Astrophysik Potsdam; Alemania
Fil: Anders, F.. Leibniz Institut Fuer Astrophysik Potsdam; Alemania
Fil: Chiappini, C.. Leibniz Institut Fuer Astrophysik Potsdam; Alemania
Fil: Martig, M.. Liverpool John Moores University; Reino Unido
Fil: Queiroz, A.. Leibniz Institut Fuer Astrophysik Potsdam; Alemania
Fil: Scannapieco, Cecilia. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
GALAXY: ABUNDANCES
GALAXY: DISC
GALAXY: EVOLUTION
GALAXY: KINEMATICS AND DYNAMICS
GALAXY: STELLAR CONTENT
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:11336/150482
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/150482
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Yule-Simpson's paradox in galactic archaeologyMinchev, I.Matijevic, G.Hogg, D.W.Guiglion, G.Steinmetz, M.Anders, F.Chiappini, C.Martig, M.Queiroz, A.Scannapieco, CeciliaGALAXY: ABUNDANCESGALAXY: DISCGALAXY: EVOLUTIONGALAXY: KINEMATICS AND DYNAMICSGALAXY: STELLAR CONTENThttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Simpson's paradox, or Yule-Simpson effect, arises when a trend appears in different subsets of data but disappears or reverses when these subsets are combined. We describe here seven cases of this phenomenon for chemo-kinematical relations believed to constrain the MilkyWay disc formation and evolution. We show that interpreting trends in relations, such as the radial and vertical chemical abundance gradients, the age-metallicity relation, and the metallicity- rotational velocity relation (MVR), can lead to conflicting conclusions about the Galaxy past if analyses marginalize over stellar age and/or birth radius. It is demonstrated that the MVR in RAVE giants is consistent with being always strongly negative, when narrow bins of [Mg/Fe] are considered. This is directly related to the negative radial metallicity gradients of stars grouped by common age (mono-age populations) due to the inside-out disc formation. The effect of the asymmetric drift can then give rise to a positive MVR trend in high-[a/Fe] stars, with a slope dependent on a given survey's selection function and observational uncertainties. We also study the variation of lithium abundance, A(Li), with [Fe/H] of AMBRE:HARPS dwarfs. A strong reversal in the positive A(Li)-[Fe/H] trend of the total sample is found for mono-age populations, flattening for younger groups of stars. Dissecting by birth radius shows strengthening in the positive A(Li)-[Fe/H] trend, shifting to higher [Fe/H] with decreasing birth radius; these observational results suggest new constraints on chemical evolutionmodels. This work highlights the necessity for precise age estimates for large stellar samples covering wide spatial regions.Fil: Minchev, I.. Leibniz Institut Fuer Astrophysik Potsdam; AlemaniaFil: Matijevic, G.. Leibniz Institut Fuer Astrophysik Potsdam; AlemaniaFil: Hogg, D.W.. No especifíca;Fil: Guiglion, G.. Leibniz Institut Fuer Astrophysik Potsdam; AlemaniaFil: Steinmetz, M.. Leibniz Institut Fuer Astrophysik Potsdam; AlemaniaFil: Anders, F.. Leibniz Institut Fuer Astrophysik Potsdam; AlemaniaFil: Chiappini, C.. Leibniz Institut Fuer Astrophysik Potsdam; AlemaniaFil: Martig, M.. Liverpool John Moores University; Reino UnidoFil: Queiroz, A.. Leibniz Institut Fuer Astrophysik Potsdam; AlemaniaFil: Scannapieco, Cecilia. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaWiley Blackwell Publishing, Inc2019-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/150482Minchev, I.; Matijevic, G.; Hogg, D.W.; Guiglion, G.; Steinmetz, M.; et al.; Yule-Simpson's paradox in galactic archaeology; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 487; 3; 5-2019; 3946-39570035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/stz1239/5486117info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stz1239info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:15:18Zoai:ri.conicet.gov.ar:11336/150482instacron: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:34982025-10-15 15:15:18.992CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Yule-Simpson's paradox in galactic archaeology
title Yule-Simpson's paradox in galactic archaeology
spellingShingle Yule-Simpson's paradox in galactic archaeology
Minchev, I.
GALAXY: ABUNDANCES
GALAXY: DISC
GALAXY: EVOLUTION
GALAXY: KINEMATICS AND DYNAMICS
GALAXY: STELLAR CONTENT
title_short Yule-Simpson's paradox in galactic archaeology
title_full Yule-Simpson's paradox in galactic archaeology
title_fullStr Yule-Simpson's paradox in galactic archaeology
title_full_unstemmed Yule-Simpson's paradox in galactic archaeology
title_sort Yule-Simpson's paradox in galactic archaeology
dc.creator.none.fl_str_mv Minchev, I.
Matijevic, G.
Hogg, D.W.
Guiglion, G.
Steinmetz, M.
Anders, F.
Chiappini, C.
Martig, M.
Queiroz, A.
Scannapieco, Cecilia
author Minchev, I.
author_facet Minchev, I.
Matijevic, G.
Hogg, D.W.
Guiglion, G.
Steinmetz, M.
Anders, F.
Chiappini, C.
Martig, M.
Queiroz, A.
Scannapieco, Cecilia
author_role author
author2 Matijevic, G.
Hogg, D.W.
Guiglion, G.
Steinmetz, M.
Anders, F.
Chiappini, C.
Martig, M.
Queiroz, A.
Scannapieco, Cecilia
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv GALAXY: ABUNDANCES
GALAXY: DISC
GALAXY: EVOLUTION
GALAXY: KINEMATICS AND DYNAMICS
GALAXY: STELLAR CONTENT
topic GALAXY: ABUNDANCES
GALAXY: DISC
GALAXY: EVOLUTION
GALAXY: KINEMATICS AND DYNAMICS
GALAXY: STELLAR CONTENT
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Simpson's paradox, or Yule-Simpson effect, arises when a trend appears in different subsets of data but disappears or reverses when these subsets are combined. We describe here seven cases of this phenomenon for chemo-kinematical relations believed to constrain the MilkyWay disc formation and evolution. We show that interpreting trends in relations, such as the radial and vertical chemical abundance gradients, the age-metallicity relation, and the metallicity- rotational velocity relation (MVR), can lead to conflicting conclusions about the Galaxy past if analyses marginalize over stellar age and/or birth radius. It is demonstrated that the MVR in RAVE giants is consistent with being always strongly negative, when narrow bins of [Mg/Fe] are considered. This is directly related to the negative radial metallicity gradients of stars grouped by common age (mono-age populations) due to the inside-out disc formation. The effect of the asymmetric drift can then give rise to a positive MVR trend in high-[a/Fe] stars, with a slope dependent on a given survey's selection function and observational uncertainties. We also study the variation of lithium abundance, A(Li), with [Fe/H] of AMBRE:HARPS dwarfs. A strong reversal in the positive A(Li)-[Fe/H] trend of the total sample is found for mono-age populations, flattening for younger groups of stars. Dissecting by birth radius shows strengthening in the positive A(Li)-[Fe/H] trend, shifting to higher [Fe/H] with decreasing birth radius; these observational results suggest new constraints on chemical evolutionmodels. This work highlights the necessity for precise age estimates for large stellar samples covering wide spatial regions.
Fil: Minchev, I.. Leibniz Institut Fuer Astrophysik Potsdam; Alemania
Fil: Matijevic, G.. Leibniz Institut Fuer Astrophysik Potsdam; Alemania
Fil: Hogg, D.W.. No especifíca;
Fil: Guiglion, G.. Leibniz Institut Fuer Astrophysik Potsdam; Alemania
Fil: Steinmetz, M.. Leibniz Institut Fuer Astrophysik Potsdam; Alemania
Fil: Anders, F.. Leibniz Institut Fuer Astrophysik Potsdam; Alemania
Fil: Chiappini, C.. Leibniz Institut Fuer Astrophysik Potsdam; Alemania
Fil: Martig, M.. Liverpool John Moores University; Reino Unido
Fil: Queiroz, A.. Leibniz Institut Fuer Astrophysik Potsdam; Alemania
Fil: Scannapieco, Cecilia. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description Simpson's paradox, or Yule-Simpson effect, arises when a trend appears in different subsets of data but disappears or reverses when these subsets are combined. We describe here seven cases of this phenomenon for chemo-kinematical relations believed to constrain the MilkyWay disc formation and evolution. We show that interpreting trends in relations, such as the radial and vertical chemical abundance gradients, the age-metallicity relation, and the metallicity- rotational velocity relation (MVR), can lead to conflicting conclusions about the Galaxy past if analyses marginalize over stellar age and/or birth radius. It is demonstrated that the MVR in RAVE giants is consistent with being always strongly negative, when narrow bins of [Mg/Fe] are considered. This is directly related to the negative radial metallicity gradients of stars grouped by common age (mono-age populations) due to the inside-out disc formation. The effect of the asymmetric drift can then give rise to a positive MVR trend in high-[a/Fe] stars, with a slope dependent on a given survey's selection function and observational uncertainties. We also study the variation of lithium abundance, A(Li), with [Fe/H] of AMBRE:HARPS dwarfs. A strong reversal in the positive A(Li)-[Fe/H] trend of the total sample is found for mono-age populations, flattening for younger groups of stars. Dissecting by birth radius shows strengthening in the positive A(Li)-[Fe/H] trend, shifting to higher [Fe/H] with decreasing birth radius; these observational results suggest new constraints on chemical evolutionmodels. This work highlights the necessity for precise age estimates for large stellar samples covering wide spatial regions.
publishDate 2019
dc.date.none.fl_str_mv 2019-05
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/11336/150482
Minchev, I.; Matijevic, G.; Hogg, D.W.; Guiglion, G.; Steinmetz, M.; et al.; Yule-Simpson's paradox in galactic archaeology; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 487; 3; 5-2019; 3946-3957
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/150482
identifier_str_mv Minchev, I.; Matijevic, G.; Hogg, D.W.; Guiglion, G.; Steinmetz, M.; et al.; Yule-Simpson's paradox in galactic archaeology; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 487; 3; 5-2019; 3946-3957
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/url/https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/stz1239/5486117
info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stz1239
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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score 13.22299

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