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Related papers: The Gaia-ESO Survey: Separating disk chemical subs…

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We study the chemical evolution of Zr, La, Ce and Eu in the Milky Way discs and bulge by means of chemical evolution models compared with recent spectroscopic data. We consider detailed chemical evolution models for the Galactic thick disc,…

Astrophysics of Galaxies · Physics 2020-01-15 V. Grisoni , G. Cescutti , F. Matteucci , R. Forsberg , H. Jönsson , N. Ryde

The evolution history of the Milky Way disk is imprinted in the ages, positions, and chemical compositions of individual stars. In this study, we derive the intrinsic density distribution of different stellar populations using the final…

In the Milky Way, the distribution of stars in the $[\alpha/\mathrm{Fe}]$ vs. $[\mathrm{Fe/H}]$ and $[\mathrm{Fe/H}]$ vs. age planes holds essential information about the history of star formation, accretion, and dynamical evolution of the…

Astrophysics of Galaxies · Physics 2023-06-16 Aarya A. Patil , Jo Bovy , Sebastian Jaimungal , Neige Frankel , Henry W. Leung

Understanding the assembly of our Galaxy requires us to also characterize the systems that helped build it. In this work, we accomplish this by exploring the chemistry of accreted halo stars from the Gaia-Enceladus/Gaia-Sausage (GES)…

Solar and Stellar Astrophysics · Physics 2022-05-04 Andreia Carrillo , Keith Hawkins , Paula Jofré , Danielle de Brito Silva , Payel Das , Madeline Lucey

The Apache Point Observatory Galactic Evolution Experiment (APOGEE) provides spectroscopic information of regions of the inner Milky Way inaccessible to optical surveys. We present the first large study of the metallicity distribution of…

We determine detailed elemental abundances in stars belonging to the so-called Group 1 of the Geneva-Copenhagen survey (GCS) and compare the chemical composition with the Galactic thin- and thick-disc stars, with the GCS Group 2 and Group 3…

Solar and Stellar Astrophysics · Physics 2015-06-23 R. Ženovienė , G. Tautvaišienė , B. Nordström , E. Stonkutė , G. Barisevičius

Understanding the formation and evolution of the Milky Way's thin and thick discs is crucial to galaxy formation studies. We derive age and metallicity distributions of the kinematic thick and thin discs using the CMDft.Gaia pipeline and…

We adopt a scenario in which the Galactic thick disk was formed by minor merging between the first generation of the Galactic thin disk (FGTD) and a dwarf galaxy about 9 Gyr ago and thereby investigate chemical and dynamical properties of…

Astrophysics of Galaxies · Physics 2015-05-28 Kenji Bekki , Takuji Tsujimoto

The Gaia-ESO Survey (GES) is a large public spectroscopic survey that was carried out using the multi-object FLAMES spectrograph at the Very Large Telescope. The survey provides accurate radial velocities, stellar parameters, and elemental…

The analysis of large molecular line surveys of the Galactic plane is essential for our understanding of the gas kinematics on Galactic scales, in particular its link with the formation and evolution of dense structures in the interstellar…

Astrophysics of Galaxies · Physics 2019-12-25 M. Riener , J. Kainulainen , H. Beuther , J. D. Henshaw , J. H. Orkisz , Y. Wang

A suite of vast stellar surveys mapping the Milky Way, culminating in the Gaia mission, is revolutionizing the empirical information about the distribution and properties of stars in the Galactic stellar disk. We review and lay out what…

Astrophysics of Galaxies · Physics 2013-12-04 Hans-Walter Rix , Jo Bovy

We developed a new selection method of halo stars in the phase-space distribution defined by the three integrals of motion in an axisymmetric Galactic potential, ($E$, $L_z$, $I_3$), where $I_3$ is the third integral of motion. The method…

Astrophysics of Galaxies · Physics 2021-03-03 Daniela Carollo , Masashi Chiba

The local stellar halo of the Milky Way is known to contain the debris from accreted dwarf galaxies and globular clusters, in the form of stellar streams and over-densities in the space of orbital properties (e.g. integrals of motion).…

Models of chemical evolution of galaxies including the dust are nowadays required to decipher the high-z universe. In a series of three papers we have tackled the problem and set a modern chemical evolution model. In the first paper (Piovan…

Astrophysics of Galaxies · Physics 2011-07-25 L. Piovan , C. Chiosi , E. Merlin , T. Grassi , R. Tantalo , U. Buonomo , L. P. Cassarà

The Milky Way has distinct structural stellar components linked to its formation and subsequent evolution, but disentangling them is nontrivial. With the recent availability of high-quality data for a large numbers of stars in the Milky…

Astrophysics of Galaxies · Physics 2023-07-05 Amalie Stokholm , Víctor Aguirre Børsen-Koch , Dennis Stello , Marc Hon , Claudia Reyes

The formation of our Milky Way can be parsed qualitatively into different phases that resulted in its structurally different stellar populations: the halo and the disk components. Revealing a quantitative overall picture of the Galactic…

Astrophysics of Galaxies · Physics 2022-03-24 Maosheng Xiang , Hans-Walter Rix

Metal-poor stars play an import role in the understanding of Galaxy formation and evolution. Evidence of the early mergers that built up the Galaxy might remain in the distributions of abundances, kinematics, and orbital parameters of the…

Astrophysics of Galaxies · Physics 2020-12-09 André R. da Silva , Rodolfo Smiljanic , Riano E. Giribaldi

Models of the chemical evolution of our Galaxy are extended to include radial migration of stars and flow of gas through the disc. The models track the production of both iron and alpha elements. A model is chosen that provides an excellent…

Astrophysics · Physics 2015-05-13 Ralph Schoenrich , James Binney

With the help of Gaia data, it is noted that in addition to the core components, there are low-density outer halo components in the extended region of open clusters. To study the extended structure beyond the core radius of the cluster…

Astrophysics of Galaxies · Physics 2022-07-27 Jing Zhong , Li Chen , Yueyue Jiang , Songmei Qin , Jinliang Hou