Results 1 to 10 of about 200,659 (240)
Milky Way dynamics in light of Gaia [PDF]
New Astronomy ReviewsThe Gaia mission has triggered major developments in the field of Galactic dynamics in recent years, which we discuss in this review. The structure and kinematics of all Galactic components - disc, bar/bulge and halo - are now mapped in great detail not only in the Solar neighbourhood, but across a large part of the Milky Way. The dramatic improvements
John Douglas Hunt, Eugene Vasiliev
semanticscholar +5 more sources
Testing two alternative theories to dark matter with the Milky Way dynamics [PDF]
General Relativity and Gravitation, 2015 Two alternative theories to dark matter are investigated by testing their ability to describe consistently the dynamics of the Milky Way. The first one refers to a modified gravity theory having a running gravitational constant and the second assumes ...
Paulo L. C. de Oliveira +2 more
semanticscholar +6 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 ...
Fabio Iocco +2 more
core +12 more sources
Dynamics of stellar and HI streams in the Milky Way halo [PDF]
EPJ Web of Conferences, 2012 4 pages, 2 figures, to appear in the proceedings of "Assembling the Puzzle of the Milky Way", Le Grand-Bornand (Apr 17-22, 2011)
Shoko Jin
core +8 more sources
Galactic Forces Rule the Dynamics of Milky Way Dwarf Galaxies [PDF]
The Astrophysical Journal, 2018 Dwarf galaxies populating the Galactic halo are assumed to host the largest fractions of dark matter, as calculated from their velocity dispersions. Their major axes are preferentially aligned with the Vast Polar Structure (VPOS) that is perpendicular to
F. Hammer +6 more
semanticscholar +9 more sources
Gas dynamics and large-scale morphology of the Milky Way galaxy [PDF]
Monthly Notices of the Royal Astronomical Society, 1999 We present a new model for the gas dynamics in the galactic disk inside the Sun's orbit. Quasi-equilibrium flow solutions are determined in the gravitational potential of the deprojected COBE NIR bar and disk, complemented by a central cusp and, in some models, an outer halo.
P. Englmaier, Ortwin Gerhard
core +8 more sources
The escape velocity curve of the Milky Way in modified Newtonian dynamics [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 We determine the escape velocity from the Milky Way (MW) at a range of Galactocentric radii in the context of Modified Newtonian Dynamics (MOND). Due to its non-linear nature, escape is possible if the MW is considered embedded in a constant external ...
Indranil Banik, Hongsheng Zhao
semanticscholar +9 more sources
Milky Way chemo‐dynamics in the era of Gaia [PDF]
Astronomische Nachrichten, 2016 The 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
Ivan Minchev, C. Chiappini, Marie Martig
semanticscholar +7 more sources
Dynamics and history of the Milky Way [PDF]
Proceedings of the International Astronomical Union, 2009 AbstractThe structure and dynamics of the Galaxy contain information about both its current workings and its assembly history. I review our understanding of the dynamics of the disk and stellar halo, and sketch how these may be used to unravel how our Galaxy formed.
A. Helmi
openalex +5 more sources
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 ...
Zhen Wan +19 more
openalex +3 more sources