Publications (15)
The local high velocity tail and the Galactic escape speed
Alis J. Deason, Azadeh Fattahi, Vasily Belokurov +4
We model the fastest moving (v_tot > 300 km/s) local (D < 3 kpc) halo stars using cosmological simulations and 6-dimensional Gaia data. Our approach is to use our knowledge of the…
Reducing noise in moving-grid codes with strongly-centroidal Lloyd mesh regularization
Philip Mocz, Mark Vogelsberger, Rudiger Pakmor +3
A method for improving the accuracy of hydrodynamical codes that use a moving Voronoi mesh is described. Our scheme is based on a new regularization scheme that constrains the mesh…
The slight spin of the old stellar halo
Alis J. Deason, Vasily Belokurov, Sergey E. Koposov +4
We combine Gaia data release 1 astrometry with Sloan Digital Sky Survey (SDSS) images taken some ~10-15 years earlier, to measure proper motions of stars in the halo of our Galaxy.…
The origin of galactic metal-rich stellar halo components with highly eccentric orbits
Azadeh Fattahi, Vasily Belokurov, Alis J. Deason +6
Using the astrometry from the ESA's Gaia mission, previous works have shown that the Milky Way stellar halo is dominated by metal-rich stars on highly eccentric orbits. To shed lig…
The SEEDZ Simulations: Methodology and First Results on Massive Black Hole Seeding and Early Galaxy Growth
Lewis R. Prole, John A. Regan, Daxal Mehta +13
Here we introduce the SEEDZ simulations, a suite of cosmological hydrodynamic simulations exploring the formation and growth of the first massive black holes in the Universe. SEEDZ…
Satellites of Satellites: The Case for Carina and Fornax
Stephen A. Pardy, Elena D'Onghia, Julio Navarro +6
We use the Auriga cosmological simulations of Milky Way (MW)-mass galaxies and their surroundings to study the satellite populations of dwarf galaxies in CDM. As expected from…