Results 11 to 20 of about 179,998 (300)
The mass of the Milky Way from satellite dynamics [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 We present and apply a method to infer the mass of the Milky Way (MW) by comparing the dynamics of MW satellites to those of model satellites in the eagle cosmological hydrodynamics simulations.
T. Callingham +8 more
semanticscholar +6 more sources
Modified Newtonian dynamics in the Milky Way [PDF]
Monthly Notices of the Royal Astronomical Society, 2005 Both microlensing surveys and radio-frequency observations of gas flow imply that the inner Milky Way is completely dominated by baryons, contrary to the predictions of standard cold dark matter (CDM) cosmology. We investigate the predictions of the Modified Newtonian Dynamics (MOND) formula for the Galaxy given the measured baryon distribution ...
Famaey, Benoît, Binney, James
openaire +4 more sources
ACTION-BASED DYNAMICAL MODELING FOR THE MILKY WAY DISK [PDF]
The Astrophysical Journal, 2016 ABSTRACT We present RoadMapping, a full-likelihood dynamical modeling machinery that aims to recover the Milky Way’s (MW) gravitational potential from large samples of stars in the Galactic disk. RoadMapping models the observed positions and velocities of stars with a parameterized, three-integral distribution function (DF) in a ...
Wilma H. Trick, Jo Bovy, Hans-Walter Rix
openaire +5 more sources
Dynamically constraining the length of the Milky way bar
Monthly Notices of the Royal Astronomical Society, 2023 ABSTRACT We present a novel method for constraining the length of the Galactic bar using 6D phase-space information to directly integrate orbits. We define a pseudo-length for the Galactic bar, named RFreq, based on the maximal extent of trapped bar orbits.
Madeline Lucey +7 more
openaire +2 more sources
Testing modified Newtonian dynamics in the Milky Way [PDF]
Physical Review D, 2015 Modified Newtonian dynamics (MOND) is an empirical theory originally proposed to explain the rotation curves of spiral galaxies by modifying the gravitational acceleration, rather than by invoking dark matter. Here,we set constraints on MOND using an up-to-date compilation of kinematic tracers of the Milky Way and a comprehensive collection of ...
Iocco F., Pato M., Bertone G.
openaire +6 more sources
Milky Way chemo‐dynamics in the era of Gaia [PDF]
Astronomische Nachrichten, 2016 AbstractThe main goal of Galactic Archaeology is understanding the formation and evolution of the basic Galactic components. This requires sophisticated chemo‐dynamical modeling, where disc asymmetries (e.g., perturbations from the central bar, spirals arms, and infalling satellites) and non‐equilibrium processes are taken into account self ...
Minchev, I, Chiappini, C, Martig, M
openaire +2 more sources
A dynamically young and perturbed Milky Way disk [PDF]
Nature, 2018 The evolution of the Milky Way disk, which contains most of the stars in the Galaxy, is affected by several phenomena. For example, the bar and the spiral arms of the Milky Way induce radial migration of stars and can trap or scatter stars close to orbital resonances.
Antoja, T. +12 more
openaire +9 more sources
The Astrophysical Journal, 2023 We continue our series of papers on phase-space distributions of stars in the Milky Way based on photometrically derived metallicities and Gaia astrometry, with a focus on the halo−disk interface in the local volume.
Deokkeun An +3 more
doaj +1 more source
Dynamics in the outskirts of four Milky Way globular clusters: it’s the tides that dominate [PDF]
Monthly notices of the Royal Astronomical Society, 2022 We present the results of a spectroscopic survey of the outskirts of four globular – 1261, NGC 4590, NGC 1904, and NGC 1851 – covering targets within 1° from the cluster centres, with 2dF/AAOmega on the Anglo-Australian Telescope (AAT) and FLAMES on ...
Z. Wan +19 more
semanticscholar +1 more source
Life in the fast lane: a direct view of the dynamics, formation, and evolution of the Milky Way’s bar [PDF]
Monthly notices of the Royal Astronomical Society, 2019 Studies of the ages, abundances, and motions of individual stars in the Milky Way provide one of the best ways to study the evolution of disc galaxies over cosmic time.
J. Bovy +5 more
semanticscholar +1 more source