Katharine J. Schlesinger

TL;DR: In this paper, a clean dynamical selection of GSE stars was performed using the GALAH+ survey data release 3 (DR3) to identify the early building block of the GSE.

TL;DR: In this article , the authors leverage a large sample of ∼600,000 high-resolution stellar spectra from the GALAH survey plus a machine learning algorithm to find 54 candidates with estimated [Fe/H] ≤−3.0, six of which have [Fe /H] ≥ 3.5, and find the magnitude-limited metallicity distribution function of their sample is consistent with previous work that used more complex selection criteria.

TL;DR: In this paper, a combination of elemental abundances and stellar parameters from the GALAH and Apache Point Observatory Galactic Evolution Experiment (APOGEE) surveys was used to find that the abundances of the highest likelihood Nyx members are entirely consistent with membership of the thick disk, and inconsistent with a dwarf galaxy origin.

TL;DR: In this paper, the authors used an automated method to determine the set of parameters of a model atmosphere that reproduces each observed spectrum best, based on an optimization algorithm and evaluate model fluxes by means of interpolation in a precomputed grid.

TL;DR: GALAH+ as mentioned in this paper provides reduced spectra with new derivations of stellar parameters and abundances of 30 chemical elements for 584,015 dwarfs and giants, 88% of them in the Gaia magnitude range 11 =3 visits spanning more than a year.