DECam Community Science Workshop 2018: Science Highlights, Coming Opportunities, LSST Synergies
May 21-22, 2018 • Tucson, Arizona
Wide-field instruments such as DECam allow efficient surveys of large galaxies such as Sextans. We have conducted a variability survey in this galaxy in the g and r bands covering for the first time the full extension of this satellite of the Milky Way, which is located at 80 kpc from the Sun. Although the survey was designed to detect the short period SX Phoenicis population, we also recovered other types of variables. In total we identified 200 RR Lyrae stars, 7 anomalous cepheids, and 14 SX Phoenicis stars. In this talk I will discuss the properties of the variable stars in Sextans and the implications for our understanding of its stellar populations.
Authors: K. Vivas, J. Alonso-Garcia, M. Mateo, A. Walker, D. Nidever, B. Howard