380 citations · 1.6k across the 13 of their papers we have counts for
5 papers · 1 filter
Andromeda chained to the Box -- Dynamical Models for M31: Bulge & Bar
Matias Blana, Christopher Wegg, Ortwin Gerhard +5
Andromeda is our nearest neighbouring disk galaxy and a prime target for detailed modelling of the evolutionary processes that shape galaxies. We analyse the nature of M31's triaxi…
The Stellar Halo in the Inner Milky Way: Predicted Shape and Kinematics
Angeles Pérez-Villegas, Matthieu Portail, Ortwin Gerhard
We have used N-body simulations for the Milky Way to investigate the kinematic and structural properties of the old metal-poor stellar halo in the barred inner region of the Galaxy…
Dynamical modelling of the Galactic bulge and bar: the Milky Way's bar pattern speed, stellar, and dark matter mass distribution
Matthieu Portail, Ortwin Gerhard, Christopher Wegg +1
We construct a large set of dynamical models of the galactic bulge, bar and inner disk using the Made-to-Measure method. Our models are constrained to match the red clump giant den…
MOA-II Galactic Microlensing Constraints: The Inner Milky Way has a Low Dark Matter Fraction and a Near Maximal Disk
Christopher Wegg, Ortwin Gerhard, Matthieu Portail
Microlensing provides a unique tool to break the stellar to dark matter degeneracy in the inner Milky Way. We combine N-body dynamical models fitted to the Milky Way's Boxy/Peanut…
Gas dynamics in the Milky Way: a low pattern speed model
Zhi Li, Ortwin Gerhard, Juntai Shen +2
We present gas flow models for the Milky Way based on high-resolution grid-based hydrodynamical simulations. The basic galactic potential we use is from a N-body model constrained…