In the Galactic disk, stellar [Fe/H] and age predict orbits and precise [X/Fe]
We explore the structure of the element abundance–age–orbit distribution of the stars in the Milky Way’s low-α disk, by (re-)deriving…
arXiv:1907.10606Dynamics
The Dynamics Group explores how collective dynamics driven by gravitational interactions shape structures — planets, stars and galaxies — in the universe. This topic sits at the crossroads between large observed and simulated datasets that describe these structures in the real and model universe.
We anticipate group interests evolving dynamically with our membership. A common theme among current members is mining massive modern stellar surveys such as Gaia, GALAH, APOGEE and SDSS-V to learn about our home galaxy, the Milky Way. These rich datasets are bringing into sharp focus the complex interplay between stars, gas and dark matter in the Milky Way, adding fine detail to the cosmological context of galaxy formation and allowing unique tests of the nature of dark matter.
Research Highlights
Detecting Thin Stellar Streams in External Galaxies: Resolved Stars & Integrated Light
S. Pearson, T. Starkenburg, K. Johnston, BF Williams, RA Ibata
The morphology of thin stellar streams can be used to test the nature of dark matter. It is therefore crucial…
arXiv.:1906.03264The Galactic Midplane Is Not a Plane: Implications for Dynamical Analysis with Gaia Data and Beyond
A Beane, R. Sanderson, M. Ness, K. Johnston, DG Filho, M. Mac Low, D. Angles-Alcazar, D. Hogg, C. Laporte
Orbital properties of stars, computed from their six-dimensional phase space measurements and an assumed Galactic potential, are used to understand…
arXiv:1905.08803
