Galactic Archaeology with Gaia

AJ Deason, V Belokurov - New Astronomy Reviews, 2024 - Elsevier
The Gaia mission has revolutionized our view of the Milky Way and its satellite citizens. The
field of Galactic Archaeology has been piecing together the formation and evolution of the …

Beyond Gaia DR3: Tracing the [α/M]–[M/H] bimodality from the inner to the outer Milky Way disc with Gaia-RVS and convolutional neural networks

G Guiglion, S Nepal, C Chiappini… - Astronomy & …, 2024 - aanda.org
Context. In June 2022, Gaia DR3 provided the astronomy community with about one million
spectra from the Radial Velocity Spectrometer (RVS) covering the CaII triplet region. In the …

Gaia's brightest very metal-poor (VMP) stars-Metallicity catalogue of a thousand VMP stars from Gaia's radial velocity spectrometer spectra

A Viswanathan, E Starkenburg, T Matsuno… - Astronomy & …, 2024 - aanda.org
Context. Gaia DR3 has offered the scientific community a remarkable dataset of
approximately one million spectra acquired with the radial velocity spectrometer (RVS) in the …

AspGap: Augmented Stellar Parameters and Abundances for 37 Million Red Giant Branch Stars from Gaia XP Low-resolution Spectra

J Li, KWK Wong, DW Hogg, HW Rix… - The Astrophysical …, 2024 - iopscience.iop.org
We present AspGap, a new approach to inferring stellar labels from the low-resolution Gaia
XP spectra, including precise [α/M] estimates—the first time these are obtained by such an …

Chemical Cartography of the Sagittarius Stream with Gaia

EC Cunningham, JAS Hunt… - The Astrophysical …, 2024 - iopscience.iop.org
The stellar stream connected to the Sagittarius (Sgr) dwarf galaxy is the most massive tidal
stream that has been mapped in the Galaxy, and is the dominant contributor to the outer …

Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost

A Khalatyan, F Anders, C Chiappini… - Astronomy & …, 2024 - aanda.org
With Gaia Data Release 3 (DR3), new and improved astrometric, photometric, and
spectroscopic measurements for 1.8 billion stars have become available. Alongside this …

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 …

The S-PLUS Ultra-Short Survey: first data release

HD Perottoni, VM Placco, F Almeida-Fernandes… - Astronomy & …, 2024 - aanda.org
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 deg2 …

The Ones That Got Away: Chemical Tagging of Globular Cluster-Origin Stars with Gaia BP/RP Spectra

SG Kane, V Belokurov, M Cranmer, S Monty… - arXiv preprint arXiv …, 2024 - arxiv.org
Globular clusters (GCs) are sites of extremely efficient star formation, and recent studies
suggest they significantly contributed to the early Milky Way's stellar mass build-up. Although …

The GALAH Survey: Stellar parameters and abundances for 800,000 Gaia RVS spectra using GALAH DR4 and The Cannon

PB Das, DB Zucker, GM De Silva, NW Borsato… - arXiv preprint arXiv …, 2024 - arxiv.org
Analysing stellar parameters and abundances from nearly one million Gaia DR3 Radial
Velocity Spectrometer (RVS) spectra poses challenges due to the limited spectral coverage …