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The GALAH Survey: Temporal Chemical Enrichment of the Galactic Disk
Jane Lin, Martin Asplund, Yuan-Sen Ting +22
We present isochrone ages and initial bulk metallicities (, by accounting for diffusion) of 163,722 stars from the GALAH Data Release 2, mainly composed of main…
Discovery of s-process enhanced stars in the LAMOST survey
Brodie J Norfolk, Andrew R Casey, Amanda I Karakas +7
Here we present the discovery of 895 s-process-rich candidates from 454,180 giant stars observed by the Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST) using a d…
A data-driven model of nucleosynthesis with chemical tagging in a lower-dimensional latent space
Andrew R. Casey, John C. Lattanzio, Aldeida Aleti +9
Chemical tagging seeks to identify unique star formation sites from present-day stellar abundances. Previous techniques have treated each abundance dimension as being statistically…
The SkyMapper DR1.1 Search for Extremely Metal-Poor Stars
G. S. Da Costa, M. S. Bessell, A. D. Mackey +10
We present and discuss the results of a search for extremely metal-poor stars based on photometry from data release DR1.1 of the SkyMapper imaging survey of the southern sky. In pa…
A hyper-runaway white dwarf in Gaia DR2 as a Type Iax supernova primary remnant candidate
Nicholas J. Ruffini, Andrew R. Casey
Observations of stellar remnants linked to Type Ia and Type Iax supernovae are necessary to fully understand their progenitors. Multiple progenitor scenarios predict a population o…
The Southern Stellar Stream Spectroscopic Survey (): Overview, Target Selection, Data Reduction, Validation, and Early Science
T. S. Li, S. E. Koposov, D. B. Zucker +29
We introduce the Southern Stellar Stream Spectroscopy Survey (), an on-going program to map the kinematics and chemistry of stellar streams in the Southern Hemisphere. The i…