Detection of periodicity based on independence tests - II. improved serial independence measure

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Abstract

We introduce an improvement to a periodicity metric we have introduced in a previous paper. We improve on the Hoeffding-test periodicity metric, using the Blum-Kiefer-Rosenblatt (BKR) test. Besides a consistent improvement over the Hoeffding-test approach, the BKR approach turns out to perform superbly when applied to very short time series of sawtooth-like shapes. The expected astronomical implications are much more detections of RR-Lyrae stars and Cepheids in sparse photometric data bases, and of eccentric Keplerian radial-velocity (RV) curves, such as those of exoplanets in RV surveys.

Original languageEnglish
Pages (from-to)L118-L121
JournalMonthly Notices of the Royal Astronomical Society: Letters
Volume457
Issue number1
DOIs
StatePublished - 7 Jan 2016

Keywords

  • Binaries: spectroscopic
  • Methods: data analysis
  • Methods: statistical
  • Stars: individual: HIP 101453
  • Stars: variables: RR lyrae
  • Stars: variables: cepheids

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