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 ...
J A de Freitas Pacheco
exaly +3 more sources
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 ...
Jason Hunt, Eugene Vasiliev
exaly +2 more sources
A Study of the Properties and Dynamics of the Disk of Satellites in a Milky-Way-like Galaxy System [PDF]
Galaxies, 2023 The dynamics of the satellite systems of Milky-Way-like galaxies offer a useful means by which to study the galaxy formation process in the cosmological context. It has been suggested that the currently observed anisotropic distribution of the satellites
Xinghai Zhao +3 more
semanticscholar +1 more source
Orbital dynamics and histories of satellite galaxies around Milky Way-mass galaxies in the FIRE simulations [PDF]
Monthly notices of the Royal Astronomical Society, 2022 The orbits of satellite galaxies encode rich information about their histories. We investigate the orbital dynamics and histories of satellite galaxies around Milky Way (MW)-mass host galaxies using the FIRE-2 cosmological simulations, which, as ...
I. Santistevan +4 more
semanticscholar +1 more source
Dynamics of Intermediate-Mass Black Holes Wandering in the Milky Way Galaxy Using the Illustris TNG50 Simulation [PDF]
, 2022 The detection of Intermediate-Mass Black Holes (IMBHs) in dwarf galaxies is crucial to closing the gap in the wide mass distribution of black holes (∼ 3M to ∼ 5 × 1010M ). IMBHs originally located at the center of dwarfs that later collide with the Milky
E. J. Weller +3 more
semanticscholar +1 more source
How do the dynamics of the Milky Way - Large Magellanic Cloud system affect gamma-ray constraints on particle dark matter? [PDF]
Monthly notices of the Royal Astronomical Society, 2022 Previous studies on astrophysical dark matter (DM) constraints have all assumed that the Milky Way’s (MW) DM halo can be modelled in isolation. However, recent work suggests that the MW’s largest dwarf satellite, the Large Magellanic Cloud (LMC), has a
C. Eckner +4 more
semanticscholar +1 more source
Chemodynamical Analysis of Metal-rich High-eccentricity Stars in the Milky Way's Disk
The Astrophysical Journal, 2023 We present a chemodynamical analysis of 11,562 metal-rich, high-eccentricity halo-like main-sequence stars, which have been referred to as the Splash or Splashed Disk, selected from the Sloan Digital Sky Survey and Large Sky Area Multi-Object Fiber ...
Ayeon Lee +4 more
doaj +1 more source
Simulations of the Milky Way’s central molecular zone – I. Gas dynamics [PDF]
Monthly notices of the Royal Astronomical Society, 2020 We use hydrodynamical simulations to study the Milky Way’s central molecular zone (CMZ). The simulations include a non-equilibrium chemical network, the gas self-gravity, star formation, and supernova feedback.
R. Tress +7 more
semanticscholar +1 more source
The Astrophysical Journal, 2023 Orbital characteristics based on Gaia Early Data Release 3 astrometric parameters are analyzed for ∼1700 r -process-enhanced (RPE; [Eu/Fe] > +0.3) metal-poor stars ([Fe/H] ≤ −0.8) compiled from the R -Process Alliance, the GALactic Archaeology with ...
Derek Shank +10 more
doaj +1 more source
Building an Acceleration Ladder with Tidal Streams and Pulsar Timing
The Astrophysical Journal Letters, 2023 We analyse stellar streams in action-angle coordinates combined with recent local direct acceleration measurements to provide joint constraints on the potential of our galaxy.
Peter Craig +3 more
doaj +1 more source