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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/150482
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oai:ri.conicet.gov.ar:11336/150482 |
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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 Técnicas2025-09-29T10:18:06Zoai: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:34982025-09-29 10:18:07.046CONICET 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 |
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CONICET Digital (CONICET) |
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CONICET Digital (CONICET) |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
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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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13.070432 |