67 citations · 233 across the 7 of their papers we have counts for
7 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-…
The Milky Way's middle-aged inner ring
Shola M. Wylie, Jonathan P. Clarke, Ortwin E. Gerhard
We investigate the metallicity, age, and orbital anatomy of the inner Milky Way, specifically focussing on the outer bar region. We integrated a sample of APOGEE DR16 inner Galaxy…
The Pattern Speed of the Milky Way Bar/Bulge from VIRAC & Gaia
Jonathan Clarke, Ortwin Gerhard
We compare distance resolved, absolute proper motions in the Milky Way bar/bulge region to a grid of made-to-measure dynamical models with well defined pattern speeds. The data are…
A2A: 21,000 bulge stars from the ARGOS survey with stellar parameters on the APOGEE scale
S. M. Wylie, O. E. Gerhard, M. K. Ness +3
We use the data-driven method, The Cannon, to bring 21,000 stars from the ARGOS bulge survey, including 10,000 red clump stars, onto the parameter and abundance scales of the cross…
Gas Dynamics in the Galaxy: Total Mass Distribution and the Bar Pattern Speed
Zhi Li, Juntai Shen, Ortwin Gerhard +1
Gas morphology and kinematics in the Milky Way contain key information for understanding the formation and evolution of our Galaxy. We present a high resolution hydrodynamical simu…
The Milky Way bar/bulge in proper motions: a 3D view from VIRAC & Gaia
Jonathan P. Clarke, Christopher Wegg, Ortwin Gerhard +3
We have derived absolute proper motions of the entire Galactic bulge region from VIRAC and Gaia. We present these as both integrated on-sky maps and, after isolating standard candl…