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Paper: On the Binary Nature of the SX Phoenicis Star CY Aqr
Volume: 318, Spectroscopically and Spatially Resolving the Components of Close Binary Stars
Page: 346
Authors: Fu, J.N.; Sterken, C.; Barrera, L.
Abstract: Observations of a new time of maximum light of CY Aqr, an extensively-observed SX Phoenicis star, have been investigated in combination with the data presented in the literature for almost 7 decades. The O C diagram reveals that the long-term period change of CY Aqr can be represented by a linear period change combined with the light-time effect in a highly-eccentric orbit with a period of half a century. The binary nature of CY Aqr is therefore discussed with emphasis on the light-time effect procedure.
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