7 papers
The Last Galactic Firework: Timing the last significant merger with stars, globular clusters and Centauri
Chervin F. P. Laporte, Matthew D. A. Orkney
We present a robust method to empirically infer the timing of the last significant merger in the Milky Way which is tested against fully cosmological models of galaxy formation. We…
Build-up and survival of the disc: From numerical models of galaxy formation to the Milky Way
Matthew D. A. Orkney, Chervin F. P. Laporte
We study the build-up and survival of angular momentum in the stellar disc using a statistical suite of cosmological simulations of Milky Way-mass galaxies. Our results show that s…
The dawn is quiet II: Gaia XP constraints on the Milky Way's proto-Galaxy from very metal-poor MDF tails
Boquan Chen, Matthew D. A. Orkney, Yuan-Sen Ting +1
The earliest phase of the Milky Way's evolution involved a transition from a dispersion-supported proto-galaxy to a rotationally supported disk. A key chemical signature of this tr…
Discovery of A Starburst in the Early Milky Way at [Fe/H]
Boquan Chen, Matthew Orkney, Yuan-Sen Ting +1
We present an analysis of very metal-poor (VMP) and metal-poor stars () in the Gaia BP/RP or XP catalog, which reveals two distinct metallicity distri…
The Milky Way in context: The formation of galactic discs and chemical sequences from a cosmological perspective
Matthew D. A. Orkney, Chervin F. P. Laporte, Robert J. J. Grand +1
We study the formation of chemical sequences in the stellar disc of Milky Way (MW)-mass galaxies in a full cosmological context with the auriga simulations. We focus on the conditi…
The emergence of globular clusters and globular-cluster-like dwarfs
Ethan D. Taylor, Justin I. Read, Matthew D. A. Orkney +7
Globular clusters (GCs) are among the oldest and densest stellar systems in the Universe, yet how they form remains a mystery. Here we present a suite of cosmological simulations i…