Results 21 to 30 of about 173,239 (326)
Reconstructing the Last Major Merger of the Milky Way with the H3 Survey [PDF]
Astrophysical Journal, 2021 Several lines of evidence suggest that the Milky Way underwent a major merger at z ∼ 2 with the Gaia-Sausage-Enceladus (GSE) galaxy. Here we use H3 Survey data to argue that GSE entered the Galaxy on a retrograde orbit based on a population of highly ...
R. Naidu +10 more
semanticscholar +1 more source
The Poor Old Heart of the Milky Way [PDF]
Astrophysical Journal, 2022 Our Milky Way should host an ancient, metal-poor, and centrally concentrated stellar population, which reflects the star formation and enrichment in the few most massive progenitors that coalesced at high redshift to form the proto-Galaxy.
H. Rix +11 more
semanticscholar +1 more source
Trigonometric Parallaxes of High-mass Star-forming Regions: Our View of the Milky Way [PDF]
Astrophysical Journal, 2019 We compile and analyze approximately 200 trigonometric parallaxes and proper motions of molecular masers associated with very young high-mass stars. Most of the measurements come from the BeSSeL Survey using the VLBA and the Japanese VERA project.
M. Reid +17 more
semanticscholar +1 more source
On the existence of a very metal-poor disc in the Milky Way [PDF]
Monthly notices of the Royal Astronomical Society, 2023 The question of whether the Milky Way’s disc extends to low metallicity has been the subject of debate for many years. We aim to address the question by employing a large sample of giant stars with radial velocities and homogeneous metallicities based ...
Hanyuan Zhang +2 more
semanticscholar +1 more source
A synthetic view on structure and evolution of the Milky Way [PDF]
, 2003 Since the Hipparcos mission and recent large scale surveys in the optical and the near-infrared, new constraints have been obtained on the structure and evolution history of the Milky Way.
A. Robin +3 more
semanticscholar +1 more source
The Milky Way in Molecular Clouds: A New Complete CO Survey [PDF]
, 2000 New large-scale CO surveys of the first and second Galactic quadrants and the nearby molecular cloud complexes in Orion and Taurus, obtained with the CfA 1.2 m telescope, have been combined with 31 other surveys obtained over the past two decades with ...
T. Dame, D. Hartmann, P. Thaddeus
semanticscholar +1 more source
Weakly-Supervised Anomaly Detection in the Milky Way [PDF]
Monthly notices of the Royal Astronomical Society, 2023 Large-scale astrophysics datasets present an opportunity for new machine learning techniques to identify regions of interest that might otherwise be overlooked by traditional searches.
Mariel Pettee +5 more
semanticscholar +1 more source
Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe [PDF]
, 2017 We describe the Sloan Digital Sky Survey IV (SDSS-IV), a project encompassing three major spectroscopic programs. The Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2) is observing hundreds of thousands of Milky Way stars at high ...
M. Blanton +352 more
semanticscholar +1 more source
A Gaia DR2 view of the open cluster population in the Milky Way [PDF]
Astronomy & Astrophysics, 2018 Context. Open clusters are convenient probes of the structure and history of the Galactic disk. They are also fundamental to stellar evolution studies.
T. Cantat-Gaudin +12 more
semanticscholar +1 more source
The merger that led to the formation of the Milky Way’s inner stellar halo and thick disk [PDF]
Nature, 2018 The assembly of our Galaxy can be reconstructed using the motions and chemistry of individual stars1,2. Chemo-dynamical studies of the stellar halo near the Sun have indicated the presence of multiple components3, such as streams4 and clumps5, as well as
A. Helmi +5 more
semanticscholar +1 more source