Results 11 to 20 of about 45,061 (325)
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
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On the dynamics of tidal streams in the Milky Way galaxy [PDF]
, 2010 We present a brief history of Galactic astrophysics, and explain the origin of halo substructure in the Galaxy. We motivate our study of tidal streams by highlighting the tight constraints that analysis of the trajectories of tidal streams can place on the form of the Galactic potential.
Andrew McEwan Eyre
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Celestial Mechanics and Dynamical Astronomy, 2006 The Milky Way is made up of a central bar, a disk with embedded spiral arms, and a dark matter halo. Observational and theoretical constraints for the characteristic parameters of these components will be presented, with emphasis on the constraints from the dynamics of the Milky Way gas.
P. Englmaier, Ortwin Gerhard
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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 ...
Ivan Minchev, C. Chiappini, Marie Martig
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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 ...
Benoît Famaey, James Binney
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Galactic Forces Rule the Dynamics of Milky Way Dwarf Galaxies [PDF]
The Astrophysical Journal, 2018 Abstract 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 the Galactic disk, and we find their velocity gradients aligned as well ...
Francois Hammer +6 more
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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 gravitational field (EF) from distant objects.
Indranil Banik, Hongsheng Zhao
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The mass of the Milky Way from satellite dynamics [PDF]
Monthly Notices of the Royal Astronomical Society, 2019 Abstract 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. A distribution function (DF) for galactic satellites is constructed from eagle using specific angular momentum and specific energy ...
Thomas M. Callingham +8 more
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Large-scale Gas Dynamics in the Milky Way [PDF]
, 2003 We present new gas flow models for the Milky Way inside the solar circle. Using a mass model derived from the COBE/DIRBE maps and clump giant star counts, and using a parametric model for the spiral arm pattern in the disk, we calculate the gas flow and compare with 12CO observations.
P. Englmaier +2 more
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Structure and Dynamics of the Milky Way: The Evolving Picture [PDF]
, 2010 From the inception of radio astronomy, the study of the Interstellar Medium has been both aided and frustrated by one fact: we are right within it! Our embedded perspective is favourable to observing kinematic and structural details that are likely to remain inaccessible in external galaxies for some time, but not so to gaining a birdseye view of our ...
T. Foster, Brendan Cooper
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