134 citations · 255 across the 4 of their papers we have counts for
4 papers
Hunting for Brown Dwarfs in the Globular Cluster M4: 2nd epoch HST NIR observations
Andrea Dieball, L. R. Bedin, Christian Knigge +5
We present an analysis of the second epoch HST WFC3 F110W near-Infrared (NIR) imaging data of the globular cluster M4. The new dataset suggests that one of the previously suggested…
The Dynamical Effects of White Dwarf Birth Kicks in Globular Star Clusters
John M. Fregeau, Harvey B. Richer, Frederic A. Rasio +1
Recent observations of the white dwarf (WD) populations in the Galactic globular cluster NGC 6397 suggest that WDs receive a kick of a few km/s shortly before they are born. Using…
HST Observations of the White Dwarf Cooling Sequence of M4
Brad Hansen, Harvey Richer, Greg Fahlman +7
We investigate in detail the white dwarf cooling sequence of the globular cluster Messier 4. In particular we study the influence of various systematic uncertainties, both observat…
Isochrones and Luminosity Functions for Old White Dwarfs
Harvey B. Richer, Brad Hansen, Marco Limongi +3
Using a new grid of models of cooling white dwarfs, we calculate isochrones and luminosity functions in the Johnson-Kron/Cousins and HST filter sets for systems containing old whit…