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Galactic archaeology: Understanding the metallicity gradients with chemo-dynamical models

Published online by Cambridge University Press:  03 March 2020

I. Minchev ,
F. Anders  and
C. Chiappini
I. Minchev
Affiliation:
Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, 14482Potsdam, Germany email: [email protected]
F. Anders
Affiliation:
Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, 14482Potsdam, Germany email: [email protected]
C. Chiappini
Affiliation:
Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, 14482Potsdam, Germany email: [email protected]
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Abstract

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Radial metallicity gradients measured today in the interstellar medium (ISM) and stellar components of disk galaxies are the result of chemo-dynamical evolution since the beginning of disk formation. This makes it difficult to infer the disk past without knowledge of the ISM metallicity gradient evolution with cosmic time. We show that abundance gradients are meaningful only if stellar age information is available. The observed gradient inversion with distance from the disk mid-plane seen in the Milky Way can be explained as the effect of inside-out disk formation and disk flaring of mono-age populations. A novel recent method is presented for constraining the evolution of the Galactic ISM metallicity with radius and time directly from the observations, while at the same time recovering the birth radii of any stellar sample with precise metallicity and age measurements.

Keywords

stars: abundancesISM: abundancesGalaxy: abundancesGalaxy: evolutionGalaxy: disk(Galaxy:) solar neighbourhoodGalaxy: kinematics and dynamics
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium A30: Astronomy in Focus XXX , August 2018 , pp. 253 - 254
Copyright
© International Astronomical Union 2020

References

Adibekyan, V. Z., Santos, N. C., Sousa, S. G., & Israelian, G. 2011, A&A, 535, L11 Google Scholar
Anders, F., Chiappini, C., Minchev, I., et al. 2017, A&A, 600, A70 Google Scholar
Frankel, N., Rix, H.-W., Ting, Y.-S., Ness, M. K., & Hogg, D. W. 2018, arXiv:1805.09198Google Scholar
Collaboration, Gaia, Brown, A. G. A., Vallenari, A., et al. 2018, A&A, 616, A1 Google Scholar
Minchev, I., Chiappini, C., & Martig, M. 2014, A&A, 572, A92 Google Scholar
Minchev, I., Anders, F., Recio-Blanco, A., et al. 2018, MNRAS, 481, 1645 CrossRefGoogle Scholar