448 citations · 2.5k across the 34 of their papers we have counts for
9 papers · 2 filters
Is Ursa Major II the Progenitor of the Orphan Stream?
M. Fellhauer, N. W. Evans, V. Belokurov +9
Prominent in the `Field of Streams' -- the Sloan Digital Sky Survey map of substructure in the Galactic halo -- is an `Orphan Stream' without obvious progenitor. In this numerical…
The Milky Way Galaxy as a Strong Gravitational Lens
E. M. Shin, N. W. Evans
We study the gravitational lensing effects of spiral galaxies by taking a model of the Milky Way and computing its lensing properties. The model is composed of a spherical Hernquis…
The Origin of the Bifurcation in the Sagittarius Stream
M. Fellhauer, V. Belokurov, N. W. Evans +9
The latest Sloan Digital Sky Survey data reveal a prominent bifurcation in the distribution of debris of the Sagittarius dwarf spheroidal (Sgr) beginning at a right ascension of ro…
An Orphan in the "Field of Streams"
V. Belokurov, N. W. Evans, M. J. Irwin +19
We use Sloan Digital Sky Survey Data Release 5 photometry and spectroscopy to study a tidal stream that extends over 50 degrees in the North Galactic Cap. From the analysis of the…
Planetary Nebula Velocities in the Disk and Bulge of M31
C. Halliday, D. Carter, T. J. Bridges +10
We present radial velocities for a sample of 723 planetary nebulae (PNe) in the disk and bulge of M31, measured using the WYFFOS fibre spectrograph on the William Herschel telescop…
A Simple Model for Lensing by Black Holes in Galactic Nuclei
M. C. Werner, N. W. Evans
The lensing properties of the Plummer model with a central point mass and external shear are derived, including the image multiplicities, critical curves and caustics. This provide…