422 citations · 4.4k across the 64 of their papers we have counts for
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The chemical evolution of Manganese in different stellar systems
G. Cescutti, F. Matteucci, G. A. Lanfranchi +1
Aims. To model the chemical evolution of manganese relative to iron in three different stellar systems: the solar neighbourhood, the Galactic bulge and the Sagittarius dwarf sphero…
A new abundance scale for the globular cluster 47 Tuc
Andreas Koch, Andrew McWilliam
We present chemical abundances for O, Na, Mg, Al, Si, Ca, Ti and Fe in eight red giants and one turnoff star in the metal rich globular cluster 47 Tuc, based on spectroscopy with t…
An Update on the 0Z Project
J. G. Cohen, N. Christlieb, A. McWilliam +2
We give an update on our 0Z Survey to find more extremely metal poor (EMP) stars with [Fe/H] < -3 dex through mining the database of the Hamburg/ESO Survey. We present the most ext…
Globular Cluster Abundances from High-Resolution Integrated Light Spectra, I: 47 Tuc
Andrew McWilliam, Rebecca A. Bernstein
We describe the detailed chemical abundance analysis of a high-resolution (R~35,000), integrated-light (IL), spectrum of the core of the Galactic globular cluster 47 Tuc, obtained…
New Extremely Metal-Poor Stars in the Galactic Halo
Judith G. Cohen, Norbert Christlieb, Andrew McWilliam +5
We present a detailed abundance analysis based on high resolution and high signal-to-noise spectra of eight extremely metal poor (EMP) stars with [Fe/H] < -3.5$ dex, four of which…
Calibration of the Relationship between Precipitable Water Vapor and 225 GHz Atmospheric Opacity via Optical Echelle Spectroscopy at Las Campanas Observatory
Joanna Thomas-Osip, Andrew McWilliam, M. M. Phillips +4
We report precipitable water vapor (PWV) measurements made at Las Campanas Observatory using optical spectra of H2O lines obtained with the Magellan echelle spectrograph, and calcu…