AAS 197, January 2001
Session 46. Variable Stars
Display, Tuesday, January 9, 2001, 9:30am-7:00pm, Exhibit Hall

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[46.10] An Inquest of Non-Linear Pulsations in BQ Serpens and VX Puppis

T.M. Freismuth, S.B. Holmes, R.J. Dukes (Physics & Astronomy, College of Charleston)

We present analysis of two double mode Cepheid variable stars, BQ Serpens and VX Puppis. Observations were obtained using Johnson UVBRI photometry with the Four College Consortiumís (FCCAPT) Automatic Photometric Telescope. Performing Fourier exapansion, we have refined the fundamental frequency of pulsation for BQ Serpens to be 0.2341 c/d and the first overtone to 0.3320 c/d. For VX Puppis, the fundamental frequency and first overtone are 0.3320 c/d and 0.4674 c/d, respectively. Decomposing the variation to both the fundamental and first overtone exposes non-linear coupling terms. Here, we calculate the distribution of energy among these various modes of interaction based on Pardo and Porettiís analysis of the double mode Cepheid TU CAS.

This research is funded by NSF Grants #AST86-16362,\ #AST91-15114, #AST95-28906, and #AST-0071260 to the College of Charleston

The author(s) of this abstract have provided an email address for comments about the abstract: Tfreis@aol.com

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