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The Gaia-ESO Survey :
The Gaia-ESO Survey : Churning through the Milky Way
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- Hayden, M. R. (author)
- Univ Nice Sophia Antipolis, Lab Lagrange UMR 7293, CNRS, Observ Cote Azur, BP 4229, F-06304 Nice 4, France.,Université Nice Sophia Antipolis,Côte d'Azur Observatory
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- Recio-Blanco, A. (author)
- Univ Nice Sophia Antipolis, Lab Lagrange UMR 7293, CNRS, Observ Cote Azur, BP 4229, F-06304 Nice 4, France.,Université Nice Sophia Antipolis,Côte d'Azur Observatory
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- de Laverny, P. (author)
- Univ Nice Sophia Antipolis, Lab Lagrange UMR 7293, CNRS, Observ Cote Azur, BP 4229, F-06304 Nice 4, France.,Université Nice Sophia Antipolis,Côte d'Azur Observatory
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- Mikolaitis, S. (author)
- Vilnius Univ, Inst Theoret Phys & Astron, Sauletekio Al 3, LT-10257 Vilnius, Lithuania.,Vilnius University
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- Guiglion, G. (author)
- Univ Nice Sophia Antipolis, Lab Lagrange UMR 7293, CNRS, Observ Cote Azur, BP 4229, F-06304 Nice 4, France.,Côte d'Azur Observatory,Université Nice Sophia Antipolis,University of Cambridge,Leibniz Institute for Astrophysics Potsdam (AIP),INAF - Osservatorio Astrofisico di Arcetri
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- Hill, V. (author)
- Univ Nice Sophia Antipolis, Lab Lagrange UMR 7293, CNRS, Observ Cote Azur, BP 4229, F-06304 Nice 4, France.,Côte d'Azur Observatory,Université Nice Sophia Antipolis
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- Gilmore, G. (author)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.
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- Randich, S. (author)
- INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.,INAF - Osservatorio Astrofisico di Arcetri
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- Bayo, A. (author)
- Univ Valparaso, Inst Fis & Astron, Fac Ciencias, Ave Gran Bretana 1111, Valparaiso 5030, Chile.;Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany.,University of Valparaíso,Max Planck Institute for Astronomy
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- Bensby, T. (author)
- Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science
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- Bergemann, M. (author)
- Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany.,Max Planck Institute for Astronomy
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- Bragaglia, A. (author)
- INAF Osservatorio Astron Bologna, Via Ranzani 1, I-40127 Bologna, Italy.,INAF Osservatorio Astronomico di Bologna
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- Casey, A. (author)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge
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- Costado, M. (author)
- CSIC, Inst Astrofis Andalucia, Apdo 3004, E-18080 Granada, Spain.,CSIC Instituto de Astrofísica de Andalucía (IAA)
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- Feltzing, S. (author)
- Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science
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- Franciosini, E. (author)
- INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.,INAF - Osservatorio Astrofisico di Arcetri
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- Hourihane, A. (author)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge
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- Jofre, P. (author)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge
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- Koposov, S. (author)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge
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- Kordopatis, G. (author)
- Leibniz Inst Astrophys Potsdam AIP, Sternwarte 16, D-14482 Potsdam, Germany.
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- Lanzafame, A. (author)
- Univ Catania, Dipartimento Fis & Astron, Sez Astrofis, Via S Sofia 78, I-95123 Catania, Italy.;INAF Osservatorio Astrofis Catania, Via S Sofia 78, I-95123 Catania, Italy.,Osservatorio Astrofisico di Catania,University of Catania
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- Lardo, C. (author)
- Liverpool John Moores Univ, Astrophys Res Inst, 146 Brownlow Hill, Liverpool L3 5RF, Merseyside, England.,Liverpool John Moores University
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- Lewis, J. (author)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge
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- Lind, Karin (author)
- Uppsala University,Uppsala universitet,Observationell astrofysik,INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy,INAF - Osservatorio Astrofisico di Arcetri
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- Magrini, L. (author)
- INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.,INAF - Osservatorio Astrofisico di Arcetri
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- Monaco, L. (author)
- Univ Andres Bello, Dept Ciencias Fis, Republ 220, Santiago, Chile.,Andrés Bello National University
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- Morbidelli, L. (author)
- INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.,INAF - Osservatorio Astrofisico di Arcetri
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- Pancino, E. (author)
- INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.,INAF - Osservatorio Astrofisico di Arcetri
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- Sacco, G. (author)
- INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.
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- Stonkute, E. (author)
- Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science,Vilnius University
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- Worley, C. C. (author)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge
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- Zwitter, T. (author)
- Univ Ljubljana, Fac Math & Phys, Jadranska 19, Ljubljana 1000, Slovenia.,University of Ljubljana
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Univ Nice Sophia Antipolis, Lab Lagrange UMR 7293, CNRS, Observ Cote Azur, BP 4229, F-06304 Nice 4, France Université Nice Sophia Antipolis (creator_code:org_t)
- 2018-01-12
- 2018
- English.
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In: Astronomy and Astrophysics. - : EDP SCIENCES S A. - 0004-6361 .- 1432-0746. ; 609
- Related links:
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http://dx.doi.org/10...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://lup.lub.lu.s...
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Abstract
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- Context: There have been conflicting results with respect to the extent that radial migration has played in the evolution of the Galaxy. Additionally, observations of the solar neighborhood have shown evidence of a merger in the past history of the Milky Way that drives enhanced radial migration.Aims: We attempt to determine the relative fraction of stars that have undergone significant radial migration by studying the orbital properties of metal-rich ([Fe/H] > 0.1) stars within 2 kpc of the Sun. We also aim to investigate the kinematic properties, such as velocity dispersion and orbital parameters, of stellar populations near the Sun as a function of [Mg/Fe] and [Fe/H], which could show evidence of a major merger in the past history of the Milky Way.Methods: We used a sample of more than 3000 stars selected from the fourth internal data release of the Gaia-ESO Survey. We used the stellar parameters from the Gaia-ESO Survey along with proper motions from PPMXL to determine distances, kinematics, and orbital properties for these stars to analyze the chemodynamic properties of stellar populations near the Sun.Results: Analyzing the kinematics of the most metal-rich stars ([Fe/H] > 0 : 1), we find that more than half have small eccentricities (e < 0 : 2) or are on nearly circular orbits. Slightly more than 20% of the metal-rich stars have perigalacticons R-p > 7 kpc. We find that the highest [Mg/ Fe], metal-poor populations have lower vertical and radial velocity dispersions compared to lower [Mg/Fe] populations of similar metallicity by similar to 10 km s(-1). The median eccentricity increases linearly with [Mg/Fe] across all metallicities, while the perigalacticon decreases with increasing [Mg/Fe] for all metallicities. Finally, the most [Mg/Fe]-rich stars are found to have significant asymmetric drift and rotate more than 40 km s(-1) slower than stars with lower [Mg/Fe] ratios.Conclusions: While our results cannot constrain how far stars have migrated, we propose that migration processes are likely to have played an important role in the evolution of the Milky Way, with metal-rich stars migrating from the inner disk toward to solar neighborhood and past mergers potentially driving enhanced migration of older stellar populations in the disk.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- Galaxy: kinematics and dynamics
- Galaxy: disk
- Galaxy: stellar content
- Galaxy: structure
- Galaxy: disk
- Galaxy: kinematics and dynamics
- Galaxy: stellar content
- Galaxy: structure
Publication and Content Type
- ref (subject category)
- art (subject category)
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To the university's database
- By the author/editor
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Hayden, M. R.
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Recio-Blanco, A.
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de Laverny, P.
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Mikolaitis, S.
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Guiglion, G.
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Hill, V.
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Gilmore, G.
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Randich, S.
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Bayo, A.
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Bensby, T.
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Bergemann, M.
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Bragaglia, A.
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Casey, A.
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Costado, M.
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Feltzing, S.
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Franciosini, E.
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Hourihane, A.
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Jofre, P.
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Koposov, S.
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Kordopatis, G.
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Lanzafame, A.
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Lardo, C.
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Lewis, J.
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Lind, Karin
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Magrini, L.
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Monaco, L.
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Morbidelli, L.
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Pancino, E.
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Sacco, G.
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Stonkute, E.
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Worley, C. C.
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Zwitter, T.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
- Articles in the publication
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Astronomy and As ...
- By the university
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Uppsala University
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Lund University