Discovery of the spectroscopic binary nature of the Cepheids X Puppis and XX Sagittarii
We present the analysis of photometric and spectroscopic data of two bright Galactic Cepheids, X Puppis and XX Sagittarii. Based on the available data in the literature as well as our own observations spanning 75 years, we conclude that both Cepheids belong to spectroscopic binary systems. However, the data are not sufficient to determine the
Szabados, László et al.
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2012