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Detailed Abundances in the Ultra-faint Magellanic Satellites Carina II and III
Alexander P. Ji, Ting S. Li, Joshua D. Simon +15
We present the first detailed elemental abundances in the ultra-faint Magellanic satellite galaxies Carina II (Car II) and Carina III (Car III). With high-resolution Magellan/MIKE…
Catalogues of Active Galactic Nuclei From Gaia and unWISE Data
Yiping Shu, Sergey E. Koposov, N. Wyn Evans +4
We present two catalogues of active galactic nucleus (AGN) candidates selected from the latest data of two all-sky surveys -- Data Release 2 (DR2) of the \emph{Gaia} mission and th…
Chemo-dynamical properties of the Anticenter Stream: a surviving disc fossil from a past satellite interaction
Chervin F. P. Laporte, Vasily Belokurov, Sergey E. Koposov +2
Using Gaia DR2, we trace the Anticenter Stream (ACS) in various stellar populations across the sky and find that it is kinematically and spatially decoupled from the Monoceros Ring…
Proper Motions of Stellar Streams Discovered in the Dark Energy Survey
N. Shipp, T. S. Li, A. B. Pace +12
We cross-match high-precision astrometric data from Gaia DR2 with accurate multi-band photometry from the Dark Energy Survey (DES) DR1 to confidently measure proper motions for nin…
The Gaia-ESO survey: Calibrating a relationship between Age and the [C/N] abundance ratio with open clusters
G. Casali, L. Magrini, E. Tognelli +51
In the era of large high-resolution spectroscopic surveys, high-quality spectra can contribute to our understanding of the Galactic chemical evolution, providing chemical abundance…
The Great Escape: Discovery of a nearby 1700 km/s star ejected from the Milky Way by Sgr A*
Sergey E. Koposov, Douglas Boubert, Ting S. Li +17
We present the serendipitous discovery of the fastest Main Sequence hyper-velocity star (HVS) by the Southern Stellar Stream Spectroscopic Survey (S5). The star S5-HVS1 is a $\sim…