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

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

2002-11-07

arxiv.org/abs/astro-ph/0211158v1

Astron.Astrophys.399:365-372,2003

Astronomy and Astrophysics

Astrophysics

9 pages, 3 figures, 2 tables. Accepted for publication in A&A

Scientific paper

10.1051/0004-6361:20021676

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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