The GALAH Survey: Chemical tagging and chrono-chemodynamics of accreted halo stars with GALAH+ DR3 and $Gaia$ eDR3

  title={The GALAH Survey: Chemical tagging and chrono-chemodynamics of accreted halo stars with GALAH+ DR3 and \$Gaia\$ eDR3},
  author={Sven Buder and Karin Lind and Melissa K. Ness and Diane K. Feuillet and Danny Horta and Stephanie Monty and Tobias Buck and Thomas Nordlander and Joss Bland-Hawthorn and Andrew R. Casey and Gayandhi M. De Silva and Valentina D’Orazi and Kenneth C. Freeman and Michael R. Hayden and Janez Kos and Sarah L. Martell and Geraint F. Lewis and Jane Lin and Katharine J. Schlesinger and Sanjib Sharma and Jeffrey D. Simpson and Dennis Stello and Daniel B. Zucker and Toma{\vz} Zwitter and Ioana Ciucă and Jonathan Horner and Chiaki Kobayashi and Yuan-Sen Ting and Rosemary F. G. Wyse and The Galah Collaboration},
Since the advent of Gaia astrometry, it is possible to identify massive accreted systems within the Galaxy through their unique dynamical signatures. One such system, Gaia-Sausage-Enceladus (GSE), appears to be an early “building block” given its virial mass > 1010M at infall (z ∼ 1− 3). In order to separate the progenitor population from the background stars, we investigate its chemical properties with up to 30 element abundances from the GALAH+ Survey Data Release 3 (DR3). To inform our… 

Reconstructing the Disrupted Dwarf Galaxy Gaia-Sausage/Enceladus Using Its Stars and Globular Clusters

We combine spectroscopic, photometric, and astrometric information from APOGEE data release 17 and Gaia early data release 3 to perform a self-consistent characterization of Gaia-Sausage/Enceladus

Milky Way's Eccentric Constituents with Gaia, APOGEE, and GALAH

We report the results of an unsupervised decomposition of the local stellar halo in the chemodynamical space spanned by the abundance measurements from APOGEE DR17 and GALAH DR3. In our Gaussian

The Galactic Distribution of Phosphorus: A Survey of 163 Disk and Halo Stars

Phosphorus (P) is a critical element for life on Earth, yet the cosmic production sites of P are relatively uncertain. To understand how P has evolved in the solar neighborhood, we measured

Gastro Library. I. The Simulated Chemodynamical Properties of Several Gaia–Sausage–Enceladus-like Stellar Halos

The Milky Way (MW) stellar halo contains relics of ancient mergers that tell the story of our galaxy’s formation. Some of them are identified due to their similarity in energy, actions, and

The Local Stellar Halo is Not Dominated by a Single Radial Merger Event

We use halo dwarf stars with photometrically determined metallicities that are located within 2 kpc of the Sun to identify local halo substructure. The kinematic properties of these stars do not

Influence of the Gaia–Sausage–Enceladus on the Density Shape of the Galactic Stellar Halo Revealed by Halo K Giants from the LAMOST Survey

We present a study of the influence of the Gaia–Sausage–Enceladus (GSE) on the density shape of the Galactic stellar halo using 11,624 K giants from the LAMOST survey. Every star is assigned a



Python Data Science Handbook: Essential Tools for Working with Data

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Vtot, the correlation

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2018) APPENDIX A: SELECTION AND VISUALISATION TECHNIQUES OF HALO/ACCRETED STARS Many selections of major substructures in the halo via spatial, photometric, kinematic

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Vφ and [Fe/H

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Galactocentric spherical Vρ, Vφ , Vθ and [Fe/H] via GMM

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two-point velocity correlation function

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