Results 31 to 40 of about 44,509 (325)
The Flattening Metallicity Gradient in the Milky Way’s Thin Disk [PDF]
The Astrophysical Journal, 2021 Abstract We calculate the ages, orbits and phase-space coordinates for a sample of ∼4 million LAMOST and Gaia stars. The ages are cross-matched and compared with values from two other popular age catalogs, which derive the ages using different methods.
John J. Vickers, Juntai Shen, Zhao-Yu Li
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Towards a fully consistent Milky Way disk model
Astronomy & Astrophysics, 2022 Context. The semi-analytic Just-Jahreiß (JJ) model of the Galactic disk is a flexible tool for stellar population synthesis with a fine age resolution of 25 Myr. The model has recently been calibrated in the solar neighbourhood against the Gaia DR2 stars.
K. Sysoliatina, A. Just
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Thin disk kinematics from RAVE and the solar motion [PDF]
, 2012 Aims. We study the Milky Way thin disk with the Radial Velocity Experiment (RAVE) survey. We consider the thin and thick disks as different Galactic components and present a technique to statistically disentangle the two populations.
Bertelli, G. +16 more
core +2 more sources
SUBSTRUCTURE IN BULK VELOCITIES OF MILKY WAY DISK STARS [PDF]
The Astrophysical Journal, 2013 12 pages, 3 figures, 2 tables; accepted to ApJ ...
Carlin, Jeffrey L. +13 more
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Milky Way versus Andromeda: a tale of two disks [PDF]
Astronomy & Astrophysics, 2009 13 Pages, 7 figures, 2 tables, accepted for publication in Astronomy and ...
Yin, J. +6 more
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THE DISTRIBUTION OF DARK MATTER IN THE MILKY WAY’S DISK [PDF]
The Astrophysical Journal, 2014 We present an analysis of the effects of dissipational baryonic physics on the local dark matter (DM) distribution at the location of the Sun, with an emphasis on the consequences for direct detection experiments. Our work is based on a comparative analysis of two cosmological simulations of a Milky Way halo: Eris, a full hydrodynamic simulation, and ...
Pillepich A. +3 more
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Disentangling Stellar Age Estimates from Galactic Chemodynamical Evolution
The Astrophysical Journal, 2023 Stellar ages are key for determining the formation history of the Milky Way, but are difficult to measure precisely. Furthermore, methods that use chemical abundances to infer ages may entangle the intrinsic evolution of stars with the chemodynamical ...
Jeff Shen +4 more
doaj +1 more source
, 2007 This thesis work has focused on the Galactic disk kinematics to put some constraints on the scenarios of the thin and thick disk formation. It takes part of the RAVE project which has the goal to spectrocpically measure the radial velocities and the stellar parameters of one million stars in the South celestial hemisphere.
Lionel Veltz +2 more
openalex +3 more sources
Stellar Abundance Maps of the Milky Way Disk
The Astrophysical Journal, 2022 Abstract To understand the formation of the Milky Way’s prominent bar it is important to know whether stars in the bar differ in the chemical element composition of their birth material as compared to disk stars. This requires stellar abundance measurements for large samples across the Milky Way’s body.
Anna-Christina Eilers +6 more
openaire +4 more sources
Galactic kinematics with modified Newtonian dynamics
, 2009 We look for observational signatures that could discriminate between Newtonian and modified Newtonian (MOND) dynamics in the Milky Way, in view of the advent of large astrometric and spectroscopic surveys.
Angus +56 more
core +2 more sources