Results 31 to 40 of about 81,755 (239)
SLICING AND DICING THE MILKY WAY DISK IN THE SLOAN DIGITAL SKY SURVEY [PDF]
The Astrophysical Journal, 2011 We use the Stripe 82 proper-motion catalog of Bramich et al. to study the kinematics of Galactic disk stars in the solar neighborhood. We select samples of dwarf stars with reliable spectra and proper motions. They have cylindrical polar radii between 7 ⩽
Martin C. Smith +2 more
semanticscholar +5 more sources
The Astrophysical JournalThe Milky Way (MW) is a barred spiral galaxy shaped by tidal interactions with its satellites. The Large Magellanic Cloud (LMC) and the Sagittarius dwarf galaxy (Sgr) are the dominant influences at the present day. This paper presents a suite of four 10 ^
Ioana A. Stelea +2 more
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Unveiling a Young Thick Disk in the Milky Way
The Astrophysical Journal LettersThe thickness of a galaxy’s disk provides a valuable probe of its formation and evolution history. Observations of the Milky Way and local galaxies have revealed an ubiquitous disk structure with two distinctive components: an old thick disk and a ...
Jianhui Lian +7 more
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Unveiling the time evolution of chemical abundances across the Milky Way disk with APOGEE [PDF]
Monthly notices of the Royal Astronomical Society, 2023 Chemical abundances are an essential tool in untangling the Milky Way’s enrichment history. However, the evolution of the interstellar medium abundance gradient with cosmic time is lost as a result of radial mixing processes.
B. Ratcliffe +14 more
semanticscholar +1 more source
Exploring the Sgr–Milky Way–disk Interaction Using High-resolution N-body Simulations [PDF]
Astrophysical Journal, 2021 The ongoing merger of the Sagittarius (Sgr) dwarf galaxy with the Milky Way is believed to strongly affect the dynamics of the Milky Way’s disk. We present a suite of 13 N-body simulations, with 500 million–1 billion particles, modeling the interaction ...
Morgan Bennett +2 more
semanticscholar +1 more source
The Astronomical Journal, 2023 We investigate the kinematic-chemical distribution of red-giant branch stars from the LAMOST survey crossed matched with Gaia DR2 proper motions, and present time tagging for the well-known ridge structures (diagonal distributions for V _R in the R , V ...
Peng Yang +4 more
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The Astrophysical Journal, 2023 We present a Galactic disk vertical velocity analysis using OB type stars (OB stars), red clump (RC) stars, and main-sequence turnoff (MSTO) stars with different average age populations crossmatched with LAMOST DR5 and Gaia DR3. We show that the vertical
Xiang Li +5 more
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The Similarity of Abundance Ratio Trends and Nucleosynthetic Patterns in the Milky Way Disk and Bulge [PDF]
Astrophysical Journal, 2020 We compare abundance ratio trends in a sample of ∼11,000 Milky Way bulge stars (R GC < 3 kpc) from the Apache Point Observatory Galactic Evolution Experiment (APOGEE) to those of APOGEE stars in the Galactic disk (5 kpc < R GC < 11 kpc).
Emily J. Griffith +11 more
semanticscholar +1 more source
The Astrophysical Journal, 2023 We have for the first time identified the early stellar disk in the Milky Way by using a combination of elemental abundances and kinematics. Using data from APOGEE DR17 and Gaia we select stars in the Mg–Mn–Al–Fe plane with elemental abundances ...
Sofia Feltzing, Diane Feuillet
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Chemodynamical Analysis of Metal-rich High-eccentricity Stars in the Milky Way's Disk
The Astrophysical Journal, 2023 We present a chemodynamical analysis of 11,562 metal-rich, high-eccentricity halo-like main-sequence stars, which have been referred to as the Splash or Splashed Disk, selected from the Sloan Digital Sky Survey and Large Sky Area Multi-Object Fiber ...
Ayeon Lee +4 more
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