Context. The Southern Photometric Local Universe Survey (S-PLUS) is a project to map~
9300 sq deg of the sky using twelve bands (seven narrow and five broadbands) …

Abstract The Gemini South telescope is now equipped with a new high-resolution
spectrograph called the Gemini High-resolution Optical SpecTrograph (GHOST). This …

We present a chemo-dynamical analysis for 27 near main-sequence turnoff metal-poor
stars, including 20 stars analysed for the first time. The sample spans a range in [Fe/H] from …

Context. This paper presents the first public data release of the S-PLUS Ultra-Short Survey
(USS), a photometric survey with short exposure times, covering approximately 9300 deg 2 …

Context. The oldest stars in the Milky Way are metal-poor with [Fe/H]<− 1.0, displaying
peculiar elemental abundances compared to solar values. The relative variations in the …

Abstract The Gemini High Resolution Optical Spectrograph (GHOST) is a fiber-fed
spectrograph system on the Gemini South telescope that provides simultaneous wavelength …

We report on the discovery of the first ultra-metal-poor (UMP) star 2MASS J20500194−
6613298 (J2050− 6613;[Fe/H]=− 4.05) selected from the Gaia BP/RP spectral catalogue that …

Kilonova spectra provide us with direct information about rapid neutron-capture
nucleosynthesis (r-process) in neutron star (NS) mergers. In this paper, we study the …

Context. The third r-process peak (Os, Ir, Pt) is poorly understood due to observational
challenges, with spectral lines located in the blue or near-ultraviolet region of stellar spectra …

Context. The APOGEE, GALAH, and LAMOST spectroscopic surveys have substantially
contributed to our understanding of the Milky Way by providing a wide range of stellar …