2 papers
astro-ph.SR2016
Pulsating hot O subdwarfs in Omega Cen: mapping a unique instability strip on the Extreme Horizontal Branch
S. K. Randall, A. Calamida, G. Fontaine +10
We present an extensive survey for rapid pulsators among Extreme Horizontal Branch (EHB) stars in omega Cen. The observations performed consist of nearly 100 hours of time-series p…
astro-ph.SR2013
The soundtrack of RR Lyrae in Omega Cen at high-frequency
A. Calamida, S. K. Randall, M. Monelli +8
We present preliminary Sloan u',g'-band light curves for a sample of known RR Lyrae variables in the Galactic globular cluster Omega Cen. Results are based on the partial reduction…