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Understanding the Cool DA White Dwarf, G29-38
S. J. Kleinman, R. E. Nather, D. E. Winget +37
The white dwarfs are promising laboratories for the study of cosmochronology and stellar evolution. Through observations of the pulsating white dwarfs, we can measure their interna…
Discovery of Extended Blue Horizontal Branches in Two Metal-Rich Globular Clusters
R. Michael Rich, Craig Sosin, S. George Djorgovski +7
We have used WFPC2 to construct B, V color-magnitude diagrams of four metal-rich globular clusters, NGC 104 (47 Tuc), NGC 5927, NGC 6388, and NGC 6441. All four clusters have well…
Peculiar Multimodality on the Horizontal Branch of the Globular Cluster NGC 2808
Craig Sosin, Ben Dorman, S. George Djorgovski +6
We present distributions of colors of stars along the horizontal branch of the globular cluster NGC 2808, from Hubble Space Telescope WFPC2 imaging in B, V, and an ultraviolet filt…
HST Observations of High-Density Globular Clusters
G. Piotto, C. Sosin, I. R. King +6
In this paper we present preliminary results from our HST project aimed at exploring the connection between the stellar dynamics and stellar evolution in the cores of high-density…
Globular Clusters Color-Magnitude Diagrams with HST
C. Sosin, G. Piotto, S. G. Djorgovski +6
In this paper we present the 13 B and V color-magnitude diagrams discussed by Piotto et al. in the same Procedings. The data have been collected with the WFPC2 camera on HST. We em…