408 citations · 3.3k across the 57 of their papers we have counts for
6 papers · 2 filters
A new population of extended, luminous star clusters in the halo of M31
A. P. Huxor, N. R. Tanvir, M. J. Irwin +5
We present three new clusters discovered in the halo of M31 which, although having globular-like colours and luminosities,have an unusually large half-light radii, ~30 pc. They lie…
Distances and Metallicities for 17 Local Group Galaxies
A. W. McConnachie, M. J Irwin, A. M. N. Ferguson +3
We have obtained Johnson V and Gunn i photometry for a large number of Local Group galaxies using the Isaac Newton Telescope Wide Field Camera (INT WFC). The majority of these gala…
A Keck/Deimos Survey of Red Giant Branch Stars in the Outskirts of M31
Annette Ferguson, Scott Chapman, Rodrigo Ibata +3
We are using the DEIMOS multi-object spectrograph on the Keck II 10m telescope to conduct a spectroscopic survey of red giant branch stars in the outskirts of M31. To date, velocit…
The tidal trail of NGC205?
A. McConnachie, M. Irwin, G. Lewis +4
Using data taken as part of the Isaac Newton Telescope Wide Field Camera (INT WFC) survey of M31, we have identified an arc-like overdensity of blue, presumably metal-poor, red gia…
Determining the Location of the Tip of the Red Giant Branch in Old Stellar Populations: M33, Andromeda I & II
A. W. McConnachie, M. J. Irwin, A. M. N. Ferguson +3
The absolute bolometric luminosity of the point of core Helium ignition in old, metal poor, red-giant stars is of roughly constant magnitude, varying only very slightly with mass o…
The Andromeda Stream
G. F. Lewis, R. A. Ibata, S. C. Chapman +4
The existence of a stream of tidally stripped stars from the Sagittarius Dwarf galaxy demonstrates that the Milky Way is still in the process of accreting mass. More recently, an e…