A search for period changes in δ Scuti stars with the super-LOTIS sky patrol system

C. Blake, D. W. Fox, H. S. Park, G. G. Williams

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

We have observed a sample of δ Scuti stars discovered by the ROTSE collaboration in 1999 with Super-LOTIS in order to characterize changes in their pulsation periods over a time baseline of roughly three years. Achieving these goals required the creation of an automated astrometric and photometric data reduction pipeline for the Super-LOTIS camera. Applying this pipeline to data from a June 2002 observing campaign, we detect pulsations in 18 objects, and find that in two cases the periods have changed significantly over the three years between the ROTSE and Super-LOTIS observations. Since theory predicts the evolutionary period changes should be quite small, sources of non-evolutionary period changes due to the interactions of pulsations modes are discussed.

Original languageEnglish (US)
Pages (from-to)365-372
Number of pages8
JournalAstronomy and astrophysics
Volume399
Issue number1
DOIs
StatePublished - Jan 1 2003

Keywords

  • Stars: oscillations
  • Stars: variables: δ Scuti
  • Techniques: photometric

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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