623 citations · 3k across the 51 of their papers we have counts for
11 papers · 1 filter
On the origin of the asymmetric dwarf galaxy distribution around Andromeda
Zhen Wan, William H. Oliver, Geraint F. Lewis +2
The dwarf galaxy distribution surrounding M31 is significantly anisotropic in nature. Of the 30 dwarf galaxies in this distribution, 15 form a disc-like structure and 23 are contai…
Uncovering the Orbit of the Hercules Dwarf Galaxy
Alexandra L. Gregory, Michelle L. M. Collins, Denis Erkal +6
We present new chemo--kinematics of the Hercules dwarf galaxy based on Keck II-- DEIMOS spectroscopy. Our 21 confirmed members have a systemic velocity of $v_{\mathrm{Herc}}=46.4\p…
A detailed study of Andromeda XIX, an extreme local analogue of ultra diffuse galaxies
Michelle L. M. Collins, Erik J. Tollerud, R. Michael Rich +5
With a central surface brightness of mag. per sq. arcsec, and half-light radius of ~kpc, Andromeda XIX (And XIX) is an extremely diffuse…
Two major accretion epochs in M31 from two distinct populations of globular clusters
Dougal Mackey, Geraint F. Lewis, Brendon J. Brewer +12
Large galaxies grow through the accumulation of dwarf galaxies. In principle it is possible to trace this growth history using the properties of a galaxy's stellar halo. Previous i…
Comparing the Quenching Times of Faint M31 and Milky Way Satellite Galaxies
Daniel R. Weisz, Nicolas F. Martin, Andrew E. Dolphin +8
We present the star formation histories (SFHs) of 20 faint M31 satellites () that were measured by modeling sub-horizontal branch (HB) depth color-mag…
A Dwarf Disrupting -- Andromeda XXVII and the North West Stream
Janet Preston, Michelle L. M. Collins, Rodrigo A. Ibata +10
We present a kinematic and spectroscopic analysis of 38 red giant branch stars, in 7 fields, spanning the dwarf spheroidal galaxy Andromeda XXVII and the upper segment of the North…