380 citations · 1.6k across the 13 of their papers we have counts for
13 papers
The stellar mass distribution of the Milky Way's bar: an analytic model
Mattia C. Sormani, Ortwin Gerhard, Matthieu Portail +2
We present an analytic model of the stellar mass distribution of the Milky Way bar. The model is obtained by fitting a multi-component parametric density distribution to a made-to-…
Sculpting Andromeda -- made-to-measure models for M31's bar and composite bulge: dynamics, stellar and dark matter mass
Matias Blaña, Ortwin Gerhard, Christopher Wegg +6
The Andromeda galaxy (M31) contains a box/peanut bulge (BPB) entangled with a classical bulge (CB) requiring a triaxial modelling to determine the dynamics, stellar and dark matter…
The Initial Mass Function of the Inner Galaxy Measured From OGLE-III Microlensing Timescales
Christopher Wegg, Ortwin Gerhard, Matthieu Portail
We use the timescale distribution of ~3000 microlensing events measured by the OGLE-III survey, together with accurate new made-to-measure dynamical models of the Galactic bulge/ba…
Chemodynamical Modelling of the Galactic Bulge and Bar
Matthieu Portail, Christopher Wegg, Ortwin Gerhard +1
We present the first self-consistent chemodynamical model fitted to reproduce data for the galactic bulge, bar and inner disk. We extend the Made-to-Measure method to an augmented…
Revisiting the Tale of Hercules: how stars orbiting the Lagrange points visit the Sun
Angeles Pérez-Villegas, Matthieu Portail, Christopher Wegg +1
We propose a novel explanation for the Hercules stream consistent with recent measurements of the extent and pattern speed of the Galactic bar. We have adapted a made-to-measure dy…
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…