237 citations · 1.7k across the 21 of their papers we have counts for
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The mass content of the Sculptor dwarf spheroidal galaxy
G. Battaglia, A. Helmi, E. Tolstoy +1
We present a new determination of the mass content of the Sculptor dwarf spheroidal galaxy, based on a novel approach which takes into account the two distinct stellar populations…
A new view of the dwarf spheroidal satellites of the Milky Way from VLT/FLAMES: Where are the very metal poor stars?
Amina Helmi, M. J. Irwin, E. Tolstoy +13
As part of the Dwarf galaxies Abundances and Radial-velocities Team (DART) program, we have measured the metallicities of a large sample of stars in four nearby dwarf spheroidal ga…
An Optical Velocity for the Phoenix Dwarf Galaxy
Mike Irwin, Eline Tolstoy
We present the results of a VLT observing program carried out in service mode using FORS1 on ANTU in Long Slit mode to determine the optical velocities of nearby low surface bright…
Using the Ca II Triplet to Trace Abundance Variations in Individual Red Giant Branch stars in Three Nearby Galaxies
Eline Tolstoy, Michael J. Irwin, Andrew A. Cole +3
Spectroscopic abundance determinations for stars spanning a Hubble time in age are necessary in order to unambiguously determine the evolutionary histories of galaxies. Using FORS1…
The evolution of Omega(HI) and the epoch of formation of damped Lyman-alpha absorbers
Celine Peroux, Richard G. McMahon, Lisa J. Storrie-Lombardi +1
We present a study of the evolution of the column density distribution, f(N,z), and total neutral hydrogen mass in high-column density quasar absorbers using candidates from a rece…
The Optical Velocity of the Antlia Dwarf Galaxy
Eline Tolstoy, Michael Irwin
We present the results of a VLT observing program carried out in service mode using FORS1 on ANTU in Long Slit mode to determine the optical velocities of nearby low surface bright…
APM z>4 QSO Survey: Spectra and Intervening Absorption Systems
L. J. Storrie-Lombardi, R. G. McMahon, M. J. Irwin +1
The APM multicolor survey for bright z > 4 objects, covering 2500 deg^2 of sky to m(R)~19, resulted in the discovery of thirty-one quasars with z > 4. High signal-to-noise optical…