127 citations · 203 across the 5 of their papers we have counts for
6 papers
Exploring the nature and synchronicity of early cluster formation in the Large Magellanic Cloud: III. Horizontal Branch Morphology
R. Wagner-Kaiser, Dougal Mackey, Ata Sarajedini +5
We leverage new high-quality data from Hubble Space Telescope program GO-14164 to explore the variation in horizontal branch morphology among globular clusters in the Large Magella…
Uncovering Multiple Populations in NGC 7099 (M 30) using Washington Photometry
Heinz Frelijj, Douglas Geisler, Jeffrey Cummings +5
Over the last decade, the classical definition of Globular Clusters (GCs) as simple stellar populations was revolutionized due to the discovery of "Multiple Populations" (MPs). How…
Exploring the nature and synchronicity of early cluster formation in the Large Magellanic Cloud: II. Relative ages and distances for six ancient globular clusters
R. Wagner-Kaiser, Dougal Mackey, Ata Sarajedini +6
We analyze Hubble Space Telescope observations of six globular clusters in the Large Magellanic Cloud from program GO-14164 in Cycle 23. These are the deepest available observation…
WIYN Open Cluster Study. LXXV. Testing the Metallicity Dependence of Stellar Lithium Depletion Using Hyades-Aged Clusters. 1. Hyades & Praesepe
Jeffrey D. Cummings, Constantine P. Deliyannis, Ryan M. Maderak +1
WIYN/Hydra spectroscopy (at R~15,000) of the moderately metal-rich Praesepe and Hyades open clusters was used to study their main sequence (MS) iron ([Fe/H]) and lithium (A(Li)) ab…
An Ultramassive 1.28 M White Dwarf in NGC 2099
Jeffrey D. Cummings, Jason S. Kalirai, P. -E. Tremblay +2
With the Keck I Low-Resolution Imaging Spectrometer we have observed nine white dwarf candidates in the very rich open cluster NGC 2099 (M37). The spectroscopy shows seven to be DA…
Initial-Final Mass Relation for 3 to 4 M Progenitors of White Dwarfs from the Single Cluster NGC 2099
Jeffrey D. Cummings, Jason S. Kalirai, P. -E. Tremblay +1
We have expanded the sample of observed white dwarfs in the rich open cluster NGC 2099 (M37) with the Keck Low-Resolution Imaging Spectrometer. Of 20 white dwarf candidates, the sp…