Publications (50)
Mass estimators in the Gaia era
J. An, N. W. Evans, A. J. Deason
Forthcoming astrometric missions such as the Gaia satellite will bring to the fore the problem of estimating the enclosed mass from a set of positions, radial velocities and proper…
Accurate Masses for Navarro-Frenk-White Dark Matter Haloes
N. W. Evans, J. An, A. Deason
We consider the problem of estimating the virial mass of a dark halo from the positions and velocities of a tracer population. Although a number of general tools are available, mor…
The Doubloon Models of Dark Haloes
N. W. Evans, J. An, A. Bowden +1
A family of spherical halo models with flat circular velocity curves is presented. This includes models in which the rotation curve has a finite central value but declines outwards…
Self-consistent potential-density pairs of thick disks and flattened galaxies
J. An, N. W. Evans
We analyze the Miyamoto--Nagai substitution, which was introduced over forty years ago to build models of thick disks and flattened elliptical galaxies. Through it, any spherical p…
Reflection symmetries of Isolated Self-consistent Stellar Systems
J. An, N. W. Evans, J. L. Sanders
Isolated, steady-state galaxies correspond to equilibrium solutions of the Poisson--Vlasov system. We show that (i) all galaxies with a distribution function depending on energy al…
JWST reveals a supernova following a gamma-ray burst at z 7.3
A. J. Levan, B. Schneider, E. Le Floc'h +50
The majority of energetic long-duration gamma-ray bursts (GRBs) are thought to arise from the collapse of massive stars, making them powerful tracers of star formation across cosmi…