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Despite the recent advancements in the field of galaxy formation and evolution, fully self-consistent simulations are still unable to make the detailed predictions necessary for the planned and ongoing large spectroscopic and photometry…

Astrophysics of Galaxies · Physics 2019-08-19 Ivan Minchev , Cristina Chiappini , Marie Martig

We study the role of radial migration of stars on the chemical evolution of the Milky Way disk. In particular, we are interested in the impact of that process on the local properties of the disk (age-metallicity relation and its dispersion,…

Astrophysics of Galaxies · Physics 2015-08-19 M. Kubryk , N. Prantzos , E. Athanassoula

[Abridge] In the first paper of this series (paper I) we presented a new approach for studying the chemo-odynamical evolution in disk galaxies, focusing on the Milky Way. Here we extend these results to different distances from the Galactic…

Astrophysics of Galaxies · Physics 2014-12-03 Ivan Minchev , Cristina Chiappini , Marie Martig

In this study we address whether the age--metallicity relation (AMR) deviates from the expected trend of metallicity increasing smoothly with age. We also show the presence (or absence) of two populations, as recently claimed using a…

Astrophysics of Galaxies · Physics 2024-11-06 Anastasiia Plotnikova , Lorenzo Spina , Bridget Ratcliffe , Giada Casali , Giovanni Carraro

We examine the chemical and dynamical structure in the solar neighbourhood of a model Galaxy that is the endpoint of a simulation of the chemical evolution of the Milky Way in the presence of radial mixing of stars and gas. Although the…

Astrophysics of Galaxies · Physics 2014-11-20 Ralph Schoenrich , James Binney

In the last years, stellar migration in galactic discs has been the subject of several investigations. However, its impact on the chemical evolution of the Milky Way still needs to be fully quantified. In this paper, we aim at imposing some…

Astrophysics of Galaxies · Physics 2015-06-22 E. Spitoni , D. Romano , F. Matteucci , L. Ciotti

We present a multi-zone galactic chemical evolution (GCE) model for the Milky Way that takes the most recently updated yields of major nucleosynthesis channels into account. It incorporates physical processes commonly found in previous GCE…

Astrophysics of Galaxies · Physics 2023-07-11 Boquan Chen , Michael R. Hayden , Sanjib Sharma , Joss Bland-Hawthorn , Chiaki Kobayashi , Amanda I. Karakas

We investigate thin and thick stellar disc formation in Milky-Way-mass galaxies using twelve FIRE-2 cosmological zoom-in simulations. All simulated galaxies experience an early period of bursty star formation that transitions to a late-time…

We present a scenario of the chemical enrichment of the solar neighborhood that solves the G-dwarf problem by taking into account constraints on a larger scale. We argue that the Milky Way disk within 10 kpc has been enriched to solar…

Astrophysics of Galaxies · Physics 2019-05-22 M. Haywood , O. N. Snaith , M. D. Lehnert , P. Di Matteo , S. Khoperskov

We analyse the chemical properties of a set of solar vicinity stars, and show that the small dispersion in abundances of \alpha-elements at all ages provides evidence that the SFH has been uniform throughout the thick disk. In the context…

Astrophysics of Galaxies · Physics 2015-04-13 M. Haywood , P. Di Matteo , O. Snaith , M. Lehnert

In this letter we examine the evolution of the radial metallicity gradient induced by secular processes, in the disk of an $N$-body Milky Way-like galaxy. We assign a [Fe/H] value to each particle of the simulation according to an initial,…

Astrophysics of Galaxies · Physics 2015-06-18 A. Curir , A. L. Serra , A. Spagna , M. G. Lattanzi , P. Re Fiorentin , A. Diaferio

A simple model for the evolution of disc galaxies is presented. We adopt three numbers from observations of the Milky Way disc, the local surface mass density, the stellar scale length (of the assumedly exponential disc) and the amplitude…

Astrophysics · Physics 2009-11-11 Thorsten Naab , Jeremiah P. Ostriker

The separation of the Milky Way disk into a thin and thick component is supported by differences in the spatial, kinematic and metallicity distributions of their stars. These differences have led to the view that the thick disk formed early…

Astrophysics of Galaxies · Physics 2015-05-20 Sarah R. Loebman , Rok Roskar , Victor P. Debattista , Zeljko Ivezic , Thomas R. Quinn , James Wadsley

The radial metallicity distribution of the Milky Way's disc is an important observational constraint for models of the formation and evolution of our Galaxy. It informs our understanding of the chemical enrichment of the Galactic disc and…

The $([\alpha/{\rm Fe}],[{\rm Fe/H}])$ distribution of Milky Way stars shows at least two distinct sequences, which have traditionally been associated with the thin and thick disc components. The abundance distribution varies systematically…

Astrophysics of Galaxies · Physics 2021-08-04 Sanjib Sharma , Michael R. Hayden , Joss Bland-Hawthorn

We study the evolution of Milky Way thick and thin discs in the light of the most recent observational data. In particular, we analyze abundance gradients of O, N, Fe and Mg along the thin disc as well as the [Mg/Fe] vs. [Fe/H] relations…

Astrophysics of Galaxies · Physics 2020-09-10 Marco Palla , Francesca Matteucci , Emanuele Spitoni , Fiorenzo Vincenzo , Valeria Grisoni

The Milky Way serves as a template for understanding the formation and evolution of late-type massive disk galaxies since we can obtain detailed chemical and kinematic information for large samples of individual stars. However, the early…

Both simulations and observations suggest that the disk assembly of galaxies is governed by the interplay between coplanar gas inflow, ex-planar gas outflow and in-situ star formation on the disk, known as the leaky accretion disk. This…

Astrophysics of Galaxies · Physics 2024-06-18 Enci Wang , Jianhui Lian , Yingjie Peng , Xin Wang

The thickness of a galaxy's disk provides a valuable probe of its formation and evolution history. Observations of the Milky Way and local galaxies have revealed an ubiquitous disk structure with two distinctive components: an old thick…

Astrophysics of Galaxies · Physics 2025-04-16 Jianhui Lian , Min Du , Shuai Lu , Bingqiu Chen , Gail Zasowski , Zhaoyu Li , Xiaojie Liao , Chao Liu

In this paper, we investigate some chemokinematical properties of the Milky Way disk, by using a sample composed by 424 late-type dwarfs. We show that the velocity dispersion of a stellar group correlates with the age of this group,…

Astrophysics · Physics 2009-11-10 H. J. Rocha-Pinto , C. Flynn , J. Scalo , J. Hanninen , W. J. Maciel , G. Hensler
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