Conditional Entropy Methods for Period Detection in Variable Stars
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Authors
Debiase, Vincent
Issue Date
2015-04-10
Type
oral_presentation
Language
en_US
Keywords
Astrophysics , Variable Stars , Period Detection
Alternative Title
Abstract
We consider the use of conditional entropy methods to detect the periods of variable stars. We apply this method to the almost 20,000 Cepheids and RR Lyrae stars in the OGLE III database. Such pulsating stars are very important for establishing the size and age scales in the Universe and the accurate detection of the period is a crucial step.The Conditional Entropy method produces results in very good agreement with existing methods such as Lomb-Scargle, but there are some differences, particularly at short periods. We discuss these differences, mostly in multimodal stars and comment on avenues for future research.