GHOST commissioning science results–II: a very metal-poor star witnessing the early galactic assembly
This study focuses on Pristine− 294759.8 (hereafter P180956,[Fe/H]=− 1.95±0.02), a star
selected from the Pristine Inner Galaxy Survey (PIGS), and followed-up with the recently …
selected from the Pristine Inner Galaxy Survey (PIGS), and followed-up with the recently …
Gemini High-resolution Optical Spectrograph (GHOST) at Gemini South: Instrument Performance and Integration, First Science, and Next Steps
VM Kalari, RJ Diaz, G Robertson… - The Astronomical …, 2024 - iopscience.iop.org
Abstract The Gemini South telescope is now equipped with a new high-resolution
spectrograph called the Gemini High-resolution Optical SpecTrograph (GHOST). This …
spectrograph called the Gemini High-resolution Optical SpecTrograph (GHOST). This …
The metal-poor edge of the Milky Way's “thin disc”
E Fernández-Alvar, G Kordopatis, V Hill… - Astronomy & …, 2024 - aanda.org
Context. The emergence of the disc in our Galaxy and the relation between thick and thin
disc formation and evolution is still a matter of debate. The chemo-dynamical …
disc formation and evolution is still a matter of debate. The chemo-dynamical …
Metal-poor stars with disc-like orbits-Possible traces of the Galactic disc at very early epochs
M Bellazzini, D Massari, E Ceccarelli… - Astronomy & …, 2024 - aanda.org
We used photometric metallicity estimates for about 700 000 stars in the surroundings of the
Sun, with very accurate distances and 3D motions measures from Gaia DR3, to explore the …
Sun, with very accurate distances and 3D motions measures from Gaia DR3, to explore the …
SDSS J102915. 14+ 172927.9: Revisiting the chemical pattern
E Caffau, P Bonifacio, L Monaco, M Steffen… - Astronomy & …, 2024 - aanda.org
Context. The small-to intermediate-mass (M< 0.8 M⊙), most metal-poor stars that formed in
the infancy of the Universe are still shining today in the sky. They are very rare, but their …
the infancy of the Universe are still shining today in the sky. They are very rare, but their …
The Science Performance of the Gemini High Resolution Optical Spectrograph
AW McConnachie, CR Hayes… - Publications of the …, 2024 - iopscience.iop.org
Abstract The Gemini High Resolution Optical Spectrograph (GHOST) is a fiber-fed
spectrograph system on the Gemini South telescope that provides simultaneous wavelength …
spectrograph system on the Gemini South telescope that provides simultaneous wavelength …
Could very low-metallicity stars with rotation-dominated orbits have been driven by the bar?
Z Yuan, C Li, NF Martin, G Monari, B Famaey… - Astronomy & …, 2024 - aanda.org
The most metal-poor stars (eg,[Fe/H]≤–2.5) are the ancient fossils from the early assembly
epoch of our Galaxy. They very likely formed before the the thick disk. Recent studies have …
epoch of our Galaxy. They very likely formed before the the thick disk. Recent studies have …
Icarus Revisited: An Ancient, Metal-poor Accreted Stellar Stream in the Disk of the Milky Way
PR Fiorentin, A Spagna, MG Lattanzi… - The Astrophysical …, 2024 - iopscience.iop.org
The search for accreted satellites in the Galactic disk is a challenging task, to which Gaia
plays a crucial role in synergy with ground-based spectroscopic surveys. In 2021, P. Re …
plays a crucial role in synergy with ground-based spectroscopic surveys. In 2021, P. Re …
GHOST commissioning science results–III. Characterizing an iron-poor damped Lyman α system
TAM Berg, CR Hayes, S Cristiani… - Monthly Notices of …, 2024 - academic.oup.com
ABSTRACT The Gemini High-resolution Optical SpecTrograph (GHOST) is a new Echelle
spectrograph available on the Gemini-South telescope as of Semester 2024A. We present …
spectrograph available on the Gemini-South telescope as of Semester 2024A. We present …
Four-hundred Very Metal-poor Stars Studied with LAMOST and Subaru. III. Dynamically Tagged Groups and Chemodynamical Properties
R Zhang, T Matsuno, H Li, W Aoki, XX Xue… - The Astrophysical …, 2024 - iopscience.iop.org
Very metal-poor (VMP) stars record the signatures of early accreted galaxies, making them
essential tools for unraveling the early stages of Galaxy formation. Understanding the origin …
essential tools for unraveling the early stages of Galaxy formation. Understanding the origin …