249 citations · 3.4k across the 56 of their papers we have counts for
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The Initial Mass Function: Now and Then
Harvey B. Richer, Gregory G. Fahlman
We examine whether existing data in clusters, both old and young, and in the field of the Galactic disk and halo is consistent with a universal slope for the initial mass function…
Deep HST V- and I-Band Observations of the Halo of M31: Evidence for Multiple Stellar Populations
Stephen Holland, Gregory G. Fahlman, Harvey B. Richer
We present deep V & I WFPC2 photometry in two fields in the M31 halo 32' and 50' from the center of M31 along the SE minor axis at the locations of the M31 GCs G302 and G312 respec…
A Weak Gravitational Lensing and X-ray Analysis of Abell 2163
G. Squires, D. M. Neumann, N. Kaiser +5
We report on the detection of dark matter in the cluster of galaxies Abell~2163 using the weak gravitational distortion of background galaxies, and an analysis of the cluster X-ray…
A Weak Gravitational Lensing Analysis of Abell 2390
G. Squires, N. Kaiser, G. Fahlman +2
We report on the detection of dark matter in the cluster Abell 2390 using the weak gravitational distortion of background galaxies. We find that the cluster light and total mass di…