**AAS 197, January 2001**

*Session 46. Variable Stars*

Display, Tuesday, January 9, 2001, 9:30am-7:00pm, Exhibit Hall
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## [46.12] Fourier inter- and intrarelations for Cepheid light curves using OGLE and Galactic data

*N. F. Bouche, S. Nikolaev, S. M. Kanbur (Department of Astronomy, University of Massachusetts, Amherst MA 01003)*

We use Fourier decomposition of V- and I-band light curves
of OGLE Cepheids in the Magellanic Clouds to obtain
relations linking the structure of Cepheid light curves at
different wavelengths. Such relations are useful to test
models and to reconstruct sparsely sampled light curves.
Based on the OGLE sample of 1284 LMC Cepheids and 2147 SMC
Cepheids we derive linear relations between corresponding
Fourier amplitudes and phases in the two bands
(`interrelations'), and relations among different-order
coefficients within the same band ('intrarelations'). The
results are compared to similar relations from a set of
Galactic Cepheids.

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