RR Lyrae Stars and Anomalous Cepheids in the Draco Dwarf Spheroidal Galaxy

/ Authors

K. Kinemuchi, H. Smith, A. Lacluyze, C. Clark, H. Harris, N. Silbermann, L. University, U. S. N. Observatory, Sirtf Science Center, D. University

/ Abstract

We present new results on RR Lyrae stars and anomalous Cepheids in the Draco dwarf spheroidal galaxy. We have increased the number of double-mode RR Lyrae stars and found three new anomalous Cepheids. With period-magnitude and period-amplitude diagrams, we discuss the Oosterhoff classification of Draco. Contradictory results were found in that Draco appears to contain both Oosterhoff I and II type RR Lyrae populations.

DOI: 10.1017/S0252921100015761