Results 21 to 30 of about 41,389 (308)
Chemical enrichment and star formation in the Milky Way disk - III. Chemodynamical constraints [PDF]
, 2004 In this paper, we investigate some chemokinematical properties of the Milky Way disk, by using a sample composed by 424 late-type dwarfs. We show that the velocity dispersion of a stellar group correlates with the age of this group, according to a law ...
H. J. Rocha–Pinto +5 more
openalex +3 more sources
SUBSTRUCTURE IN BULK VELOCITIES OF MILKY WAY DISK STARS [PDF]
The Astrophysical Journal, 2013 We find that Galactic disk stars near the anticenter exhibit velocity asymmetries in both the Galactocentric radial and vertical components across the midplane as well as azimuthally.
J. Carlin +13 more
semanticscholar +5 more sources
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
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
Reliability and limitations of inferring birth radii in the Milky Way disk [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2022 Recovering the birth radii of observed stars in the Milky Way is one of the ultimate goals of Galactic Archaeology. One method to infer the birth radius and the evolution of the ISM metallicity assumes a linear relation between the ISM metallicity with
Y. Lu, T. Buck, I. Minchev, M. Ness
semanticscholar +1 more source
Structure in the Magnetic Field of the Milky Way Disk and Halo Traced by Faraday Rotation [PDF]
Astrophysical Journal, 2022 Magnetic fields in the ionized medium of the disk and halo of the Milky Way impose Faraday rotation on linearly polarized radio emission. We compare two surveys mapping the Galactic Faraday rotation, one showing the rotation measures of extragalactic ...
J. Dickey +16 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
doaj +1 more source
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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