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Halo concentrations from extended Press-Schechter merger histories
Andrew J. Benson, Aaron Ludlow, Shaun Cole
We apply the model relating halo concentration to formation history proposed by Ludlow et al. to merger trees generated using an algorithm based on excursion set theory. We find th…
The distinct stellar metallicity populations of simulated Local Group dwarfs
Anna Genina, Carlos S. Frenk, Alejandro Benitez-Llambay +4
A number of Local Group dwarf galaxies are known to have two spatially segregated stellar metallicity populations, a centrally concentrated metal-rich population and a more extende…
The vertical motion history of disk stars throughout the Galaxy
Yuan-Sen Ting, Hans-Walter Rix
It has long been known that the vertical motions of Galactic disk stars increase with stellar age, commonly interpreted as vertical heating through orbit scattering. Here we map th…
Aurigaia: mock Gaia DR2 stellar catalogues from the Auriga cosmological simulations
Robert J. J. Grand, John Helly, Azadeh Fattahi +12
We present and analyse mock stellar catalogues that match the selection criteria and observables (including uncertainties) of the Gaia satellite data release 2 (DR2). The source ar…
What to expect from dynamical modelling of galactic haloes II: the spherical Jeans equation
Wenting Wang, Jiaxin Han, Shaun Cole +3
The spherical Jeans equation (SJE) is widely used in dynamical modelling of the Milky Way (MW) halo potential. We use haloes and galaxies from the cosmological Millennium-II simula…