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Spectroscopic search for binaries among EHB stars in globular clusters
C. Moni Bidin, R. A. Mendez, S. Moehler +3
We performed a spectroscopic search for binaries among hot Horizontal Branch stars in globular clusters. We present final results for a sample of 51 stars in NGC6752, and prelimina…
Spectroscopy of QUEST RR Lyrae Variables: the new Virgo Stellar Stream
Sonia Duffau, Robert Zinn, A. Katherina Vivas +4
Eighteen RR Lyrae variables (RRLs) that lie in the "$12\fh 4$ clump" identified by the QUEST survey have been observed spectroscopically to measure their radial velocities and meta…
SMC: Stellar Populations through deep CMDs
Noelia E. D. Noel, Carme Gallart, Edgardo Costa +1
We present deep color-magnitud diagrams (CMDs) reaching the oldest main-sequence turnoffs for 12 fields in the SMC. The {\it B}-band and {\it R}-band observations were performed us…
The open cluster NGC 6520 and the nearby dark molecular cloud Barnard 86
Giovanni Carraro, Rene Mendez, Jorge May +1
Wide field BVI photometry and CO(10) observations are presen ted in the region of the open cluster NGC 6520 and the dark molecular cloud Barnard~86. From the analysis o…