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A Search for Period Changes in Delta Scuti Stars with the Super-LOTIS Sky Patrol System

C. Blake·D. W. Fox·H. S. Park·G. G. Williams
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Abstract

We have observed a sample of Delta 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 that evolutionary period changes should be quite small, sources of non-evolutionary period changes due to the interactions of pulsations modes are discussed.

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C. Blake, D. W. Fox, H. S. Park, G. G. Williams. 2002-11-07. A Search for Period Changes in Delta Scuti Stars with the Super-LOTIS Sky Patrol System. https://doi.org/10.1051/0004-6361%3A20021676

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